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<title cf:type="text"><![CDATA[Editorial department of the Journal of National University of Defense Technology -->Mechanical Engineering]]></title>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Monitoring Cutting Tool Wear with Correlation of Random Variables]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199103008]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[At present. monitoring cutting tool wear becomes one of the most important problems to be solved urgently in automatic manufacturing. For this a new monitoring method is proposed using correlation of N dimensional Random Variables and cumulative power sum，namely comprehensively monitoring cutting tool wear and leakage by acquiring the correlation coefficient of vibration accelerations in three mutually perpendicular directions，and the cumulative power sum about torque of spindle or about any vibration acceleration. This method makes greater progress than the ones proposed before in the aspects of reliability and simplicity. So it has a bright future in application area. The theoretical basis of the method is strictly proved and some experimental results are given in this paper.]]></description>
<pubDate>2015/7/4 9:19:22</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Wen Xisen, Tang Bingyang, Hu Niaoqing and Li Shaomin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Wen Xisen, Tang Bingyang, Hu Niaoqing and Li Shaomin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199103008]]></guid><cfi:id>405</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Acoustic Emission Analysis for Research of Bearing Condition Detection]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199103009]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[For automatic detection and diagnosis of localized defects in bearings，a new way by means of acoustic emission (AE) analysis is investigated in this paper. Feature of defects is extracted by short-time signal processing techniques，analysed by pattern  recognition and evaluated by scattering matrices. The experimental and analysis results show that this new way is better than the vibration analysis method.]]></description>
<pubDate>2015/7/4 9:19:23</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Li Shengyi<sup>1</sup> and c.James Li<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Li Shengyi<sup>1</sup> and c.James Li<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199103009]]></guid><cfi:id>404</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Dynamic Graph Simulation for Robot Tasking]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199103010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper introduces a basic theory and implementation method of computer graphic simulation for robot tasking. The contents are 3-D geometric modelling for robot body and its environment objects，technology of graphic teaching programming for robot tasking，and making technique for animated cartoon. It is pointed out that some important problem should be taken into account, in designing a robot kinematic simulation system. As an example，graphic simulation demonstration of Adapt Ⅱ robot in transporting is given in the end of the paper.]]></description>
<pubDate>2015/7/4 9:19:23</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Pan Cunyun and Gao Liji]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Pan Cunyun and Gao Liji</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199103010]]></guid><cfi:id>403</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[An Equipment for On-Line Measurement of the Bore Size of a Workpiece]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199103011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The equipment for on-line measurement of the bore size of a workpiece，is described in this paper. The probe is set up by three  inductance sensors，assembled with certain angles. The result of analysis and experiment show that the error of assembling angles  between the rods of sensors is the main Cause of the measuring error. The measuring precision is better than ±2μm in the certain case. This equipment is availabe to the monitoring system of machine centres for bore size measuring. In addition，it can also be used for the measuring of eccentricity between the centres of measuring tool and workpiece bore. Especially，it is available in the batch  process for the purpose of on-line quality inspection]]></description>
<pubDate>2015/7/4 9:19:23</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Wu Jun and Li Jun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Wu Jun and Li Jun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199103011]]></guid><cfi:id>402</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Theoretical Research of Grinding-in Parameter Measurement of Slide Valves]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199101014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In this paper，the problems in measuring the parameters of grinding-in of the slide valve are theoretically analysed. The mathematical model   of flow-displacement curve is deduced. A new way of fitting the theoretical formula to eliminate the errors in data processing is put forword.  To estimate the radius of fillets and the radial clearance is especially important to the control of the machining quality of slide valve.]]></description>
<pubDate>2015/7/4 9:19:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Chen Jihong, Ning Dechu and Liang Jiancheng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Chen Jihong, Ning Dechu and Liang Jiancheng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199101014]]></guid><cfi:id>401</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Research of Microcomputer Control Measurement System for Grinding-in Parameters of Slide Valves]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199101015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper describes the measurement principle of grinding-in parameters of slide valves. The measurement system for the grinding-in parameters  of slide valves controlled by a microcomputer is established. Hardware and softwave design for the system is introduced，the experimental results of measurement system are presented，the measuring errors of the system are analysed. Final1y，several conclusions are obtained.]]></description>
<pubDate>2015/7/4 9:19:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Wang Shimin, Chen Jihong, Liang Jiancheng and Ning Dechu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Wang Shimin, Chen Jihong, Liang Jiancheng and Ning Dechu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199101015]]></guid><cfi:id>400</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A New Method for Analyzing Kinematics of the Planar Complicated Mechanism]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199101016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on the invariability principle of relative motion between two objects，a new method of analyzing kinematics of the planar complicated machanism has been presented in this paper. This new method can be used in drawing machanism chart and deriving the analytic expression among kinematic parameters. The method has been proved to be correct and effective by computer simulation.]]></description>
<pubDate>2015/7/4 9:19:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Pan Cunyun and Yang Angyue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Pan Cunyun and Yang Angyue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199101016]]></guid><cfi:id>399</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Identification and Digital Compensation of Flow-Sensor]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199101017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Theoretical and experimental research for improving the response of flow-sensor is presented in this paper. First the shortages of analogous compensation are pointed out. Then the identification and experimental method of f1ow-sensor are described. Final1y the digital compensation way for improving response of floW-sensor is established. The experiments are very effective.]]></description>
<pubDate>2015/7/4 9:19:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Liang Jiancheng, Chen Jihong and Wang Shimin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Liang Jiancheng, Chen Jihong and Wang Shimin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199101017]]></guid><cfi:id>398</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Dynamic Analysis of Field Robot's Step-legs]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199101018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[By dividing some kinematic pair from links，this paper has made a comprehensive dynamic analysis of a planar closed multiple mechanism，which  may be used as a field robot's step-leg mechanism，and We have obtained a11 the input moment of the master crank and the constrained force in every kinematic pair in a period. All of these make it possible to control，drive and modify the robot's step-leg mechanism in future.]]></description>
<pubDate>2015/7/4 9:19:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Li Dongcheng and Yang Angyue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Li Dongcheng and Yang Angyue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199101018]]></guid><cfi:id>397</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Method of Weighted Residue for the Steady State Response of Elastic Mechanisms]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199101019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Many methods of the steady state response of elastic mechanisms have been developed in recent years. As a trial，this paper proposed to adopt the method of weighted residue for the periodic response. And two basic algorithms and two examples are given. Between the two examples，the spatial four-bar RS'SR mechanism is new.]]></description>
<pubDate>2015/7/4 9:19:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Li Dongcheng<sup>1</sup>, Jin Zhiying<sup>2</sup> and Zhang Qixian<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Li Dongcheng<sup>1</sup>, Jin Zhiying<sup>2</sup> and Zhang Qixian<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199101019]]></guid><cfi:id>396</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A General Mathematic Model of Computer Aided Evaluating Profile Error of Complex Surfaces]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199204016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In this paper，a general mathematic model of profile error of complex surfaces is proposed with the least squares evaluation. The  profile errors of all kinds of surfaces can be evaluated on the basis of this model. This model is very convenient for computer processing，it can be directly applied in the productive procession. Finally，we deal with error separation and control strategies for  quality assurance.]]></description>
<pubDate>2015/7/4 9:20:31</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Quan Rong and Yang Tailai]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Quan Rong and Yang Tailai</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199204016]]></guid><cfi:id>395</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Overall Design and Research for FMC Condition Monitoring and Fault Disgnosis System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199204017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The present situation and trends of monitoring technology development are summarized in the paper. The FMS/FMC condition monitoring and fault diagnosis system. CMFDS，is designed and developed. The system composition，function，equipment，hardware/software structure，general strategies and technical features are given. The experiments in the machining-center and FMS indicates that the  system is of good generality and succinctlness. The system designed represents the integrated and intelligence trend of monitoring and  diagnosis technology development.]]></description>
<pubDate>2015/7/4 9:20:31</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Qiu Jing, Wen Xisen and Tang Bingyang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Qiu Jing, Wen Xisen and Tang Bingyang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199204017]]></guid><cfi:id>394</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analytical Design Method for the Cylindrical Cam with Oscillating Roller Follower]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199204018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In this paper，a contour surface equation has been developed for the cylindrical cam with oscillatig roller follower by utillizing enveloping theorm of differential geometry. Based on it，some essential problems，such as the condition of cylindrical cam's  undercutting，the contact zone and actual contact curves between the roller and cam，etc.，have been discussed in detail，and the formula of perssure angle as well as the minimum contact height of rollers has been derived too. All of these make the analytical design method for the cam more perfect.]]></description>
<pubDate>2015/7/4 9:20:31</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Li Dongcheng and Yang Angyue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Li Dongcheng and Yang Angyue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199204018]]></guid><cfi:id>393</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Learning Control for Piezoelectric Cutting Tool Location in Ultra-precision Manufacturing]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199203011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper presents two kinds of learning control methods-P-Integrator learning control and self-tuning control with learning parameters. Their application of piezoelectric cutting tool to ultra-precision manufacturing is also introduced. By means of using  advanced control methods，the non-linear and hysteresis characteristics of piezo-element can be overcome and high precision locating and zero-error tracking control can be achieved easily.]]></description>
<pubDate>2015/7/4 9:20:19</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Li Shengyi and Liang Jiancheng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Li Shengyi and Liang Jiancheng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199203011]]></guid><cfi:id>392</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Process State Detection Based on Auto-Regressive Model and Sequential Probabllities Ratio Test]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199202001]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The machining system process monitonig model is built on basis of the kalman filter theory and Auto-Regressive model in this paper. The system process condition can be determined by the parameters variation of the AR-model and the hypothesis testing method of sequential probability ratio test on parameter derivation covariance matrix.]]></description>
<pubDate>2015/7/4 9:20:06</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Wen Xisen, Tang Bingyang and Yan Bin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Wen Xisen, Tang Bingyang and Yan Bin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199202001]]></guid><cfi:id>391</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research of NLDDS and Neural Network for Modeling，Forecasting and Control of a Piezo-actuator]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199202002]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The nonlinear dynamic data system (NLDDS) and nonlinear recursive least square (NLRLS)methods are used for modeling，forecasting and control of a piezoelectric actuator with nonlinear hysteresis characteristics in this paper. Neural network is also used for simulation for this  purpose.  Results of above research show that these methods are feasible and effective.]]></description>
<pubDate>2015/7/4 9:20:07</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Li Shengyi, Zou Xiangyang and Wu Zhenfeng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Li Shengyi, Zou Xiangyang and Wu Zhenfeng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199202002]]></guid><cfi:id>390</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Symbolic Representation and Sural Pattern Parsing for Fuel Pressure Waveform of Diesel]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199202003]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[An approach to feature extraction and symbolic representation of the fuel injection pressure waveform of diesel is proposed based on peak  dominance relation between peak and trough in this paper. A waveform parsing system with application to structural pattern recognition of the  pressure waveform based on the representation is described. The experiments have shown it is effective to the waveform recognition.]]></description>
<pubDate>2015/7/4 9:20:07</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Wu Bo, Yang Shuzi and Li Baicheng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Wu Bo, Yang Shuzi and Li Baicheng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199202003]]></guid><cfi:id>389</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Using Gluing Assembly to Constructe 3-D Geometric Model of Robots]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199202004]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A software package of industrial robot kinematic simulation system (called IRKSS)has been implemented by authors. This paper introduces some  problems about constructing the geometric model of robots and its tasking environment on microcomputer by using gluing assembly. It includes the  data structure of geometric model, generation of elementary geometric bodies and assembling link model of robots.]]></description>
<pubDate>2015/7/4 9:20:07</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Pan Cunyun and Gao Liji]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Pan Cunyun and Gao Liji</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199202004]]></guid><cfi:id>388</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Digital Capacitive Instrument for Measuring Micro-Displacement]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199202005]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A new type of precision digital capactive，we instrmnent is developed for measuring micro displacement and vibration. In this paper，its measuring principle，specifications and features are described in detail. The effect of the angle between two electrode planes of capacitive sensor on the measuring result is also analysed in it. This instrument may have the advantage of small size, low cost and high accuracy，as well  as wide future.]]></description>
<pubDate>2015/7/4 9:20:07</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Li Hongyan and Li Jun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Li Hongyan and Li Jun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199202005]]></guid><cfi:id>387</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Automatic Compensation System of High Tension Reactive Power with Microcomputer Measuring and Controlling]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199202006]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper presents a new automatic compensation system of high tension reactive power，which consists of single-chip microcomputer，high  tension capacitor and control device. The power factor measurment is solved by using discrete Fourier transform under the condition of a great  deal of harmonics，and using nonlinear control technique，the automatic compensation of reactive power is performed. The measurment and  compensation is accurate，and the life of high tension vacuum switch is long. It has been proved in practice that the performance of this  system is stable and reliable，and its economical effect is remarkable.]]></description>
<pubDate>2015/7/4 9:20:06</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Ren Yongyi and Xu Jun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Ren Yongyi and Xu Jun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199202006]]></guid><cfi:id>386</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Researches on Compensation Technology of Spindle Rotation Error Motion in Precision Grinding]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199202007]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In this paper，characteristics of spindle rotation error motion is analysed. A new error compensation scheme based on Time Series Theory is  presented. Digital Signal processor TMS32010 is used in compensation system so that complicated control algorithm can be realized on line. The workpiece roundness，after compensation may，reach around 0.4μm，about 35～50% improvement.]]></description>
<pubDate>2015/7/4 9:20:07</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Wang Shimin, Liu Bingyun and Fan Dapeng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Wang Shimin, Liu Bingyun and Fan Dapeng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199202007]]></guid><cfi:id>385</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Study on the Method of Resonant Sound Wave for Measuring Micro-Displacement]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199202008]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[There are many methods for measuring microdisplacement accurately，but they can not be satisfied in engineering. In this paper，the principle of  the resonant method for measuring displacement has been discussed. An experimental method has been put forward. It is shown that this method is wide in measurement range，high in accuracy and strong in anti-disturbance capability.]]></description>
<pubDate>2015/7/4 9:20:07</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Wang Shimin and Zhu Xinjian]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Wang Shimin and Zhu Xinjian</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199202008]]></guid><cfi:id>384</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[FSTRP-a New Method for On-line Measurement of the Straightness of Precision Lathe]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199303016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[FSTRP (Fine Sequentia1-Three-Points)-a new method for on-line measurement of the straightness of precision machine tools and machined workpiece is proposed in this paper. FSTRP uses three sensors and chooses suitab1e distances between every two adjacent sensors，we can obtain smaller samp1ing interva1 than before. The improved a1gorithm of FSTRP is derived and its flow diagram is a1so presented in it. The results of computer simu1ation and on-line measurement experiment on precision 1athe are a1so given. It can be shown that this method is feasib1e and perfect.]]></description>
<pubDate>2015/1/23 11:00:21</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Li Shengyi,Tan Jie and Pan Peiyuan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Li Shengyi,Tan Jie and Pan Peiyuan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199303016]]></guid><cfi:id>383</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Process Condition Vibration Monitoring Based on Flexible Manufacturing Environment]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199303017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In this paper，based on the general condition monitoring model and strategies，taking vibration signals monitoring for example，two kinds of feature parameters have been extracted to monitor devices and processes of the flexible manufacturing system, the one is the variance of vibration signals，the other is the change rate of coefficients estimation of AR model of vibration signals. The monitoring system has been developed and its operating experiment results indicate the monitoring system is succinct，rapid and reliable. It can satisfy the requirements of the flexible manufacturing environments.]]></description>
<pubDate>2015/1/23 11:00:21</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Qiu Jing,Wen Xisen,Tang Bingyang and Tao Limin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Qiu Jing,Wen Xisen,Tang Bingyang and Tao Limin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199303017]]></guid><cfi:id>382</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Processing Method of Interference Signal with Computer Software]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199303018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[An interference signal directly affects the measuring accuracy. In this paper，three methods of software processing for systematic error，random  error and excessive error which result from the interference signal are disscussed，furthermore the algorithm and processing program are given.]]></description>
<pubDate>2015/1/23 11:00:21</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Liu Wenyan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Liu Wenyan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199303018]]></guid><cfi:id>381</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Dynamic Simulation for Photodetection of an Optical Pattern]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199404005]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Since the detecting area of any photodetector can't be zero，in reality the photodetection for an optical pattern is always an area-detection. If the intensity distribution to the left and the right of the characteristic point of the edge in the detected optical pattern is unsymmetrical then a mistake wil1 arise from this kind area-detection for the point position lead in detormining the position of the edge, and thus will produce the edge checkout error. But by means of the dynamic simulation for the photodetection of the optical pattern，the edge checkuout error may be previously calculated. The results of the simulation may be immediately used for the correction of the error. In this paper we take the photodetection of the Fraunhoffer diffraction pattern from a circular aperture for example，introduce the method of the dynamic simulation for  the photodetection of the optical pattern.]]></description>
<pubDate>2015/1/23 10:59:16</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Lü Haibao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Lü Haibao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199404005]]></guid><cfi:id>380</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Study on CNC System for Milling Machine]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199404006]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper describes a general CNC system，which uses AST386 as the controller，with a D C servo-drive system and software and hardware interface，the main components in this system are analyzied，and a classical PID control method is used to design the controller for this  system，finally，the system output response and the controller performance are investigated based upon the experimental data of this milling  machine system.]]></description>
<pubDate>2015/1/23 10:59:16</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Wu Xuezhong,Wen Xisen,Liang Jiancheng,Yang Lin and Tang Bingyang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Wu Xuezhong,Wen Xisen,Liang Jiancheng,Yang Lin and Tang Bingyang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199404006]]></guid><cfi:id>379</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Improved FSTRP-Studying the Method for On-line Measurement of the Straightness Again]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199404007]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In this paper，we change the method of inserting sampling points based on the old FSTRP，and adopt corresponding methods of data processing for   the random error. These improvements make the separation results more exact，and get rid of the random error efficiently，aquir the curved line  which has mors sampling points. This paper gives the algorithm and flow diagram of improved FSTRP. In accordance with the results of computer simulation and experiment，this method is feasible and reliable.]]></description>
<pubDate>2015/1/23 10:59:16</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Lin Xue,Liang Jiancheng and Li Shengyi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Lin Xue,Liang Jiancheng and Li Shengyi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199404007]]></guid><cfi:id>378</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Integral Realization and Application on Standard Error]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199403022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper，from the viewpoint of the measurement of physical quantity，synthesizes the standard error in the use of direct & indirect measurement，error analysis and result processing，and gives an explanation and illustration of it. It also makes a comprehensive survey of different textbooks and formulations，and redresses the incorrect expressions of error and confused ideas about the concept，consequently reaches an integral realization and correct usage about standard error.]]></description>
<pubDate>2015/1/23 10:59:30</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Ning Mindong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Ning Mindong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199403022]]></guid><cfi:id>377</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Optimum EST-A New Method for On-line Measurement of the Straightness of Precision Machine Tools and Machined Workpiece]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199402001]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[There are some of multiple-sensor methods used for on-line measurement of the straightness of precision machine tool and machined workpiece， But，all of these methods are only used for long workpiece measurement. The OEST method proposed in this paper is a new one that can be used   for short workpiece measurement. 1t is based on the analysis of frequency domain and optimum search in time domain. It can overcome the  mismatch problem in boundary area caused by shift in frequency domain. And，computer simulation and experiment results prove that this method is easy and efficient.]]></description>
<pubDate>2015/1/23 10:59:41</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Li Shengyi,Liang Jiancheng and Fan Dapeng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Li Shengyi,Liang Jiancheng and Fan Dapeng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199402001]]></guid><cfi:id>376</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Theory and Methods of On-line Measurement and Error Compensation of Ultraprecision Machining]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199402002]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Some theory and methods in ultraprecision machining are presented. Error separation and error compensatory control of roundness，straightness  and cylindricity are included. And nonlinear modeling of micro-driven equipment and micro-displacement measurement are also comprised. Finally some main achievements in scientific research are briefly introduced.]]></description>
<pubDate>2015/1/23 10:59:41</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Wang Shimin and Liang Jiancheng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Wang Shimin and Liang Jiancheng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199402002]]></guid><cfi:id>375</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Survey on the Limiting Transmission Ratio of 2K-H Planetary Gear Trains]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199402003]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[On the synthesis of planetary gear trains，it is very important to know the relation between the number of planets and the limiting ratio  considering the three geometric constraints: the same central, assembly and abjacent conditions，this paper has derived the expression of the  number of planets and the limiting ratio via uniform symbols which is suitable for all the six type of planetary gear trains，and obtained the  formula to evaluate the limiting ratio.]]></description>
<pubDate>2015/1/23 10:59:41</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Yang Angyue and Li Dongcheng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Yang Angyue and Li Dongcheng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199402003]]></guid><cfi:id>374</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Intelligent Machining System Structure of Machine Tool]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199402004]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In this paper the basic concepts and basic research contents of the machine tool intelligent machining are approached. The basic structure of  the machine tool intelligent machining system is proposed and the basic functions and effects of different model are also discussed in the paper.]]></description>
<pubDate>2015/1/23 10:59:41</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Liang Jiancheng<sup>1</sup>,Li Shengyi<sup>1</sup>,Wen Xisen<sup>1</sup> and Yang Shuzi<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Liang Jiancheng<sup>1</sup>,Li Shengyi<sup>1</sup>,Wen Xisen<sup>1</sup> and Yang Shuzi<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199402004]]></guid><cfi:id>373</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Distinctive Minicomputer Control Technology on Sine Frequency-sweep Vibration]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199402005]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The dinstinction of sine frequency-sweep vibration controlled by current minicomputer is almost all control fuaction, such as producing and  modifing of driving signal, sampling and analysing of responsing signal, transfer function calculation etc., being worked by computer software. This paper mainly deals with software design principle of the functions discribed above, and shows relevant experiment results.]]></description>
<pubDate>2015/1/23 10:59:41</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Chen Xun,Tang Bingyang,Wen Xisen and Lu Tiankuang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Chen Xun,Tang Bingyang,Wen Xisen and Lu Tiankuang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199402005]]></guid><cfi:id>372</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Real-time Detection of Pose and Control of Laser Guiding Vehicle (LGV)]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199402006]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A method of controlling LGV through real time pose detection is proposed in this paper. That is to deduce first LGV's instant pose (indicated  by angle deviation α and distance deviation D) from the information from the laser receiver，then control the two driving wheels' speed. The experiment results in new prototype indicate that the above method improves LGV's travel precision obviously，and is expected to be used in  real LGV.]]></description>
<pubDate>2015/1/23 10:59:41</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Pan Mengchun,Ren Yongyi and Mao Shengyong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Pan Mengchun,Ren Yongyi and Mao Shengyong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199402006]]></guid><cfi:id>371</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Research on Increasing Precision of the Step-angle of a Step-Motor]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199402007]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The problem of increasing the precision of the step-angle of a step-motor by the fine dividing for the step-motor is studied theoretically in  this paper. And by means of transfer function，the dynamic response of the system is studied.Finally，the experiment data of evenness of the  step-angle of different numbers of the fine dividing are given.]]></description>
<pubDate>2015/1/23 10:59:42</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Yan Guijun,Lü Haibao and Qi Xinmin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Yan Guijun,Lü Haibao and Qi Xinmin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199402007]]></guid><cfi:id>370</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research for Precision Technology on Measurement Displacement]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199402008]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper analyses a new photoelectrical method to measure displacement by using hologrophic grating as sensor in theory. The measuring optical system is presented from the practical view and the error is discussed in detail. The method has advantages of simple structure and high precision.]]></description>
<pubDate>2015/1/23 10:59:42</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Zhu Jigui,Lü Haibao and Qi Xinmin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Zhu Jigui,Lü Haibao and Qi Xinmin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199402008]]></guid><cfi:id>369</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on the Relation between Cutting Parameters and Surface Roughness with Fuzzy Processing Technique]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199504014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Upon metal cutting theory, theorectical surface roughness may be determined by cutting parameters. But owing to the complexity of cutting process, there is difference between practical and theoretical surface roughness. In this paper，a Fuzzy pattern recognition technique is  presented to analyse the relation between the cutting parameters and surface roughness. The principle，method and experiment results are   illustrated respectively.]]></description>
<pubDate>2015/1/23 16:03:29</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Fan Dapeng<sup>1</sup> and Chen Riyao<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Fan Dapeng<sup>1</sup> and Chen Riyao<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199504014]]></guid><cfi:id>368</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Reserch on the Laboratory Model of Magnetic Suspension Flywheels]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199504015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Magnetic suspension flywheels are executing mechanism for spacecraft attitude control，which are supported by magnetic bearing. Based on the  summary of the characteristics of magnetic bearing. this paper introduces the working principles of the laboratory model of magnetic suspension flywheel. and it also infers the dynamic equation of magnetic bearing. Besides，this paper introduces the calculating method the crucial parameters in designing magnetic bearing: axial unbalance stiffness，radial stiffness，angular stiffness. Lastly，the passive suspension characteristics of magnetic bearing are analyzed，active suspension control system is designed，and the results of the experiment are given.  Some contents involved in this paper are of referential value for other devices supported by magnetic force.]]></description>
<pubDate>2015/1/23 0:00:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Long Zhiqiang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Long Zhiqiang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199504015]]></guid><cfi:id>367</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[CYLINDRICITY ERROR COMPENSATION IN DIAMOND TURNING VIA P-INTEGRATOR REPETITIVE CONTROL]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199503001]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper describes the reduction of the cylindricity error in a diamond turning process using an in-situ metrology system，an error separating  technique，a piezo-electric micro-positioning system，and a P-integrator repetitive controller. The scheme was realized with a diamond turning lathe and proven to be effective in reducing the cylindricity error by an order of magnitude.]]></description>
<pubDate>2015/1/23 16:03:15</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Li Shengyi<sup>1</sup> and C.James Li<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Li Shengyi<sup>1</sup> and C.James Li<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199503001]]></guid><cfi:id>366</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[VISION-BASED MEASUREMENT OF FREE-FORM SURFACES]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199503002]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The accurate and fast measurement of complex free-form surfaces is of great value. But this problem has not been perfectly solved yet. When implementing this measurement, the major difficulty of stereo vision technology lies in the locating and matching of image features rapidly and accurately. This paper presents a stereo vision method for measurement of free-form surfaces with the features of laser scan targets, an optimum matching algorithm and triangular element interpolation for surface representation, which makes the measurement fast, accurate and flexible.]]></description>
<pubDate>2015/1/23 16:03:15</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Luo Feilu,Zhou Jiwei,Ni Guoqi,Tao Zemin and Yang Qiaoling]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Luo Feilu,Zhou Jiwei,Ni Guoqi,Tao Zemin and Yang Qiaoling</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199503002]]></guid><cfi:id>365</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[RESEARCH ON TECHNOLOGY AND SYSTEM FOR ON-LINE MEASUREMENT OF SURFACE ROUGHNESS IN ULTRA-PRECISION MACHINING]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199503003]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In this paper，a high-precision on-line system with laser and fiber optic sensor for measuring the surface roughness in ultra-precision  machining is reported，some technology or methods，which are indispensable for realizing high-precision of measuring are introduced，and the partial results of experiment study are given.]]></description>
<pubDate>2015/1/23 16:03:15</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Lv Haibao,Wang Yaoke,Zhu Jigui,Zhou Weihong,Huang Rui and Yan Shuhua]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Lv Haibao,Wang Yaoke,Zhu Jigui,Zhou Weihong,Huang Rui and Yan Shuhua</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199503003]]></guid><cfi:id>364</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[STUDY ON REAL1STIC TECHNOLOGY OF CONDITION MONITORING AND FAULT DIAGNOSTIC SYSTEM FOR SHIPPING POWER DEVICES]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199503004]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Condition monitoring and fault diagnosis is currently a very important problem in large-scale complicate power devices. Both scheme and realistic technology for monitoring system hardware and software have been present to solve the problem in this paper. The fault diagnostic  model based on artificial neural network and state identification method based on fuzzy analysis are studied.]]></description>
<pubDate>2015/1/23 16:03:15</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[wen Xisen,Li Yue and Tang Bingyang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>wen Xisen,Li Yue and Tang Bingyang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199503004]]></guid><cfi:id>363</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Intelligent Manufacturing Technology and Intelligent Manufacturing System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199502001]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Intelligent Manufactusing Technology (IMT) and Intelligent Manufacturing System (IMS) is one of high technology area on which highly industrialized countries pay more attention to develop and explore. In this paper，The basic concepts and principles of IMT and IMS are discussed. The core technology about manufacturing processing modeling and signal analysis,the strategy and methods of control are also discribed from the viewpoints of the intelligent control. Finally an existing example for describing the construction of IMS shows the research trands of this field.]]></description>
<pubDate>2015/1/23 16:03:02</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Li Shengyi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Li Shengyi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199502001]]></guid><cfi:id>362</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Study of the Integration of Stereo Vision Measurement and Machining of Free Surfaces]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199502002]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The technology of measurement and machining of free surfaces is extensively applied to some industries，e. g. automotive industry and aircraft industry. The integration of measurement and machining is effective in automatization，and it is usually based on 3-D CMM. Stereo vision  measurement has the advantage of low cost，high flexibility and having no touch  with the measured objects. It has great potential for  development. This paper makes analysis of some problems in the integration of stereo vision measurement and machining of free surfaces such as  image matching，surface modeling and interface design，and presents the solution as well.]]></description>
<pubDate>2015/1/23 0:00:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Luo Feilu,Chen Dixiang,Zhang Qi and Zhou Jiwei]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Luo Feilu,Chen Dixiang,Zhang Qi and Zhou Jiwei</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199502002]]></guid><cfi:id>361</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Comprehensive Model and Strategies of Condition Monitoring and Fault Diagnosis for the Flexible Manufacturing Cells]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199502003]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In this paper，a common global model and system of condition monitoring and decision has been presented for the flexible manufacturing system on  the basis of the characteristics of FMS devices and processes and the requirements for monitoring and diagnosis. This system is composed of  several subsystems of distributed multi-sensor，feature extraction, condition expression and classification，global comprehensive decision on fault. Its aims are to try to solve the question of the real-time and in-time monitoring. The practical systems bui1t on the flexible machining systems indicate this model and system is efficient.]]></description>
<pubDate>2015/1/23 16:03:02</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Qiu Jing,Wen Xisen,Tang Bingyang,Yang Yongmin and Zhang Jing]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Qiu Jing,Wen Xisen,Tang Bingyang,Yang Yongmin and Zhang Jing</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199502003]]></guid><cfi:id>360</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Implementation of Hardware for the Operational Condition Monitoring System of Large Power Devices]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199502005]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper presents a practical scheme for hardware implementation in accordance with the characteristics of wide distribution，numerous operational parameters and complex structrue in large power devices. The system is designed according to principal-sec-ondary structure. The advanced technology including amplification, filter,isolation and so on，is used to refine signal and restrain effectively various noise and disturbance so as to provide original data reliable for condition monitoring and fault diagnosis in follow-up state.]]></description>
<pubDate>2015/1/23 16:03:03</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Tao Limin,Wen Xisen and Li Yue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Tao Limin,Wen Xisen and Li Yue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199502005]]></guid><cfi:id>359</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Multisensor Fusion Via Neural Networks for On-line Estimating Surface Roughness]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199502007]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[An on-line surface roughness estimating method based on multisensor fusion via neural networks is presented for the requirement of machine tool  intelligent machining. The better estimation of surface roughness can be obtained by the method. The feature selection、dimension compression、normalization and neural networks construction of the method are discussed in this paper. The simulation results show that the proposed method is feasible and effective.]]></description>
<pubDate>2015/1/23 16:03:03</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Liang Jiancheng,Li Shengyi,Wen Xisen,Yang Lin and Wu Xuezhong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Liang Jiancheng,Li Shengyi,Wen Xisen,Yang Lin and Wu Xuezhong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199502007]]></guid><cfi:id>358</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Solution to the Inverse Kinematic Problem in Robotics by Neural Networks]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199502008]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Neural Networks have been paid more and more attention in robotics owing toits excellent abilities of parallel distributed processing，self-organizing and self-learning. This paper inquire into and analyzes the potential application of BP networks to solve robot manipulator inverse kinematic problem with multi-solutions. The illustrative example shows that the neural network can be trained to generate a fairly accurate solution without costly derivations and programming of the inverse kinematic algorithm.]]></description>
<pubDate>2015/1/23 16:03:03</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Chen Guofeng<sup>1</sup>,Yang Angyue<sup>1</sup>,Fu Xiangzhi<sup>2</sup> and Liao Daoxun<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Chen Guofeng<sup>1</sup>,Yang Angyue<sup>1</sup>,Fu Xiangzhi<sup>2</sup> and Liao Daoxun<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199502008]]></guid><cfi:id>357</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Modelling Methods of FMS Mission Reliability Block Diagram Model]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199502016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In this paper，in accordance with FMS characteristic of process flexibilty and path flexibility，the two modelling methods are presented. They are modelling method in parallel and modelling method in standby (cold-standby and warm-standby). The model simplifying rules are also  introduced. The main aim of this paper is to provide theoretical evidence for analyzing and evaluating FMS mission reliability.]]></description>
<pubDate>2015/1/23 0:00:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Hu Huaping and Wang Hao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Hu Huaping and Wang Hao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199502016]]></guid><cfi:id>356</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Order Ratio Spectrum Analysis and the Realtime Fault Diagnosis of the Car-Starters]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199604010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper mainly treats the order ratio spectrum analysis（ORSA) and its application to the realtime fault diagnosis of the car-starters.  First，it elaborates the principle of the ORSA and the way of generating and the method of being restrained to the aliasing and leakage in the  process of order ratio sampling. Then the paper discusses how to acquire the interested noise signals in the short working process of the car-starters with the rapid acceleration，and how to extract the information of their fault features from the signals in accordance with the  ORSA. Finally it diagnoses realtimely the faults of the car-starters by means of threshold judgement.]]></description>
<pubDate>2014/6/11 15:43:35</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Chen Xun,Tian Jianghong,Wen Xisen and Tang Bingyang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Chen Xun,Tian Jianghong,Wen Xisen and Tang Bingyang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199604010]]></guid><cfi:id>355</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Tool Wear Monitoring Method Based on Feature Fusion]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199604011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper presents a tool wear monitoring method based on feature fusion via neural networks. The basic principle of this method，feature  association，feature extraction，data normalization and neural networks construction of the method are discussed. The experimintal results show  that the proposed method for tool wear monitoring is reliable and effective.]]></description>
<pubDate>2014/6/11 15:43:35</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Yang Lin,Li Shengyi,Liang Jiancheng and Wu Xuezhong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Yang Lin,Li Shengyi,Liang Jiancheng and Wu Xuezhong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199604011]]></guid><cfi:id>354</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Study of Modelling and Analysis of FMS Muti-mission Reliability]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199604031]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper first summarizes FMS reliability modelling and analysis. Then aimed at the main problem in the study of FMS reliability in China,  the research direction for FMS multi-mission reliability modelling and analysis is pointed out.]]></description>
<pubDate>2014/6/11 0:00:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Hu Huaping]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Hu Huaping</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199604031]]></guid><cfi:id>353</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Synthetical Quality Control for Complicated Shape Parts Processing under High-load in aircraft engine]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199603013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The paper analyses the relation of the heat field on the parts, surface processing parameter and allowance field, then constructs the  mathematical model for parts complicated shape with digital scanning and filter. Based on this，the synthetical control of the geometric and  the surface quality of parts is established in the processing course, This is the new effective method of improving the reliability and service  life of the thin-wall parts of complicated shap under high-load in aircraft engine.]]></description>
<pubDate>2014/6/11 15:43:22</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Dai Yifan<sup>1</sup> and Serebrennikof G.Z<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Dai Yifan<sup>1</sup> and Serebrennikof G.Z<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199603013]]></guid><cfi:id>352</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A New Type Drive Mechanism on Wrist Actuator and Its Kinematic Analysis]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199602006]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on the research of the wrist actuator transmitted by spherical gear，this paper presents a new wrist drive mechanism. First its  kinematic problem is analyzed and the kinematic model is developed. Then its solution of kinematic equation is presented. Finally，the resul   of the analysis verifies the definition and accuracy of the drive mechanism.]]></description>
<pubDate>2014/6/11 15:43:03</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Liu Xianfeng,Yang Angyue,Pan Cunyun,Luo Kun and Chen Guofeng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Liu Xianfeng,Yang Angyue,Pan Cunyun,Luo Kun and Chen Guofeng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199602006]]></guid><cfi:id>351</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Effect of Geometrial Deviations of Cone Centres and Centre Holes on Roundness of Workpiece in Precision Machining and Its Mechanism]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199602007]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In precision and ultraprecision cylindrcal turning or grinding it is customary to support the workpiece with dead centres. In this paper，the effect of abnormal supporting conditions on roundness of workpiece in precision machining is discussed. Through an analysis of the relationship between the locus of the central point of the centre hole profile and frequency spectra of the out-of-roundness of centre and centre hole，the effect of geometrical deviations of centres and centre holes on roundness of workpiece the mechanism is described. An available avenue to improve the accuracy in precision and ultraprecision cylindrcal turning or grinding by centres is presented in this paper.]]></description>
<pubDate>2014/6/11 15:43:04</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[He Hanhui and Wang Shimin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>He Hanhui and Wang Shimin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199602007]]></guid><cfi:id>350</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Fuzzy Petri Nets Model for FMC Fault Diagnosis]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199602008]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In view of the Fuzziness and the uncertainty of the expert knowledge of the fault diagnosis expert system，this paper presents a method of Fuzzy production rule (FPR)knowledge representation by using Fuzzy Petri nets(FPN)model，knowledge store and Fuzzy reasoning mechanism，and  gives the algorithm implementation. Furthermore，taking the fault diagnosis expert system for the JCS-020 (FANUC) manufacturing center as an  example，We have proved in this paper the feasibility and validity of the method.]]></description>
<pubDate>2014/6/11 15:43:04</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Qiu Jing,Peng Zhihua,Wen Xisen and Tang Bingyang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Qiu Jing,Peng Zhihua,Wen Xisen and Tang Bingyang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199602008]]></guid><cfi:id>349</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Computer Aided Design of the Configuration of High Speed Train]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199602009]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In this paper，a computer aided geometry modelling software developed by the authors is described. It can be used to streamline both ends of  the high speed train. An example designed with this software is presented.]]></description>
<pubDate>2014/6/11 15:43:04</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Liang Xifeng<sup>1</sup> and Wu Xuezhong<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Liang Xifeng<sup>1</sup> and Wu Xuezhong<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199602009]]></guid><cfi:id>348</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Adaptive Active Noise Control Based on the Micro-computer Control]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199602010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[An adaptive active noise control system based on micro-computer is presented in this paper. This system can supply an agile experimental platform for the research of different system construction and control algorithm. This paper adopts LMS algorithm as an adaptive filter controller，which can automatically compensate for the effect on noise control caused by the changes of the background noise，environment factors and electrical or acoustical parameters. It can accomplish notable broad-band noise attention. The results of experiments show that   under the condition of two secondary sound resources arranged within free space，the maximum attention level obtained by the system is more  than 40dB to the single frequency and barrow-band random noise from 50 to 400Hz.]]></description>
<pubDate>2014/6/11 15:43:03</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Xu Yongcheng,Chen Xun,Wen Xisen,Tang Bingyang and Tao Limin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Xu Yongcheng,Chen Xun,Wen Xisen,Tang Bingyang and Tao Limin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199602010]]></guid><cfi:id>347</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Strategic Research on the Monitoring and Diagnosis of the Multi-object and Multi-level Equipment Condition]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199602011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[By analyzing the characteristics of the large-scale complicated equipment system，we present the systematical structure and the diagnostic strategy of the multi-object and multi-level condition monitoring and diagnosis. The realization technology of the system is also discussed.]]></description>
<pubDate>2014/6/11 15:43:04</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Li Yue,Wen Xisen,Tao Limin and Qin Guojun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Li Yue,Wen Xisen,Tao Limin and Qin Guojun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199602011]]></guid><cfi:id>346</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Condition Monitoring Method for Gear-reducer of Shipboard Steam-turbine]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199706007]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper describes the study of monitoring methods suitable for condition monitoring of gear-reducer of shipboard steam-turbine. At first  monitoring methods and feature extracting techniques are analyzed. A generic monitoring flaw is presented. Then，some relevant issues such as evaluation of monitoring methods，criterion of monitoring feature selection and strategy of decision-making，are discusscd. Finally，a brief application is demonstrated.]]></description>
<pubDate>2014/5/28 9:49:24</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Hu Niaoqing and Wen Xisen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Hu Niaoqing and Wen Xisen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199706007]]></guid><cfi:id>345</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Mathematical Modeling of Control System of AGV and Its Application]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199706008]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper presents a mathematical model of the control system of AGV. First the article studies the kinematical characteristic，analyses the  relationship between the deviation and the velocity of the wheel. Then the dynamic configuration is derived，which is a multi-input and multi-output nonlinear system. Finally it is simplified into a single-input linear model by the small deviation linearized method. This model has  been applied to a laser guided vehicle. Higher accuracy have been shown by test results.]]></description>
<pubDate>2014/5/28 9:49:24</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Ren Yongyi,Rao Dan and Pan Mengchun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Ren Yongyi,Rao Dan and Pan Mengchun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199706008]]></guid><cfi:id>344</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on Virtual Developing Technique of Complex parts]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199706010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In view of the characteristics of high accuracy，poor manufacturability，high residue or waster rate and long production period of complex part  manufacturing，based on discussing virtual product developing technique and modeling system，a new mode is presented in this paper for complex  part development. This new mode involves the work-out, design，analysis, simulation, assembly, test，evaluation of performance and economy, rapid modeling and product data management of the product under virtual status.]]></description>
<pubDate>2014/5/28 9:49:24</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Tang Luosheng,Li Shengyi,Liu Yang and Liu Zhuozhi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Tang Luosheng,Li Shengyi,Liu Yang and Liu Zhuozhi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199706010]]></guid><cfi:id>343</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Design of Non-Round Piston Ring NC Machining System and Its Servomechanism]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199705012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper summarises the developing situation of theoretic research and the technique of piston ring，and introduces a new method and  technique for non-round piston ring contour NC machining and the construction and operating principle of this system. In this paper，the design  of system's servomechanism is described. Finally，the results of the turning experiment are presented.]]></description>
<pubDate>2014/5/28 9:49:13</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[He Hanhui,Wang Shimin,Pan Zhongming and Qie Chen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>He Hanhui,Wang Shimin,Pan Zhongming and Qie Chen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199705012]]></guid><cfi:id>342</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Modal Analysis and Identification for Flexible Manipulator]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199705014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The paper presented a simple but efficient method of mode shapes identification for flexible manipulator. The method is demonstrated to be correct and feasible according to Hamilton principle and filter theory.]]></description>
<pubDate>2014/5/28 9:49:13</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Liu XinJian,Li Xun and Zhang Peng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Liu XinJian,Li Xun and Zhang Peng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199705014]]></guid><cfi:id>341</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The NC System for Copying Machining Piston Ring Based on Affine Principle]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199704018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A new NC copying machining technique for non-circular piston ring is introduced, which makes it possible to work piston rings with different pressure distribution curve using a kind of cam, and realize error compensation while cam or cutting tool wears away. It improves the flexiblility and precision of machine. Moreover, the problem of disturbance resistance is resolved by an intelligent method of making policy combine with fuzzy control technology. It improves the system robustness, as well.]]></description>
<pubDate>2014/5/28 9:47:43</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Dai Yifan,Pan Zhongming and Wang Shimin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Dai Yifan,Pan Zhongming and Wang Shimin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199704018]]></guid><cfi:id>340</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Assembly-Oriented Computer Aided Design]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199703014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper introduces the development and the related work of the assembly-oriented computer aided design, presents a representation scheme of a compound-body to the computer and focuses on the research of computer aided graphic assembly technology for 3-D objects.]]></description>
<pubDate>2014/5/28 9:47:30</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Shang Jianzhong and Pan Cunyun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Shang Jianzhong and Pan Cunyun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199703014]]></guid><cfi:id>339</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Non-linear Model Identification By Neural Network for Servo-feed System of the Ultra-precision Machine Tools]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199703015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A new forword NN structural and weight learning algorithm is adopted to build the non-linear dynamical NN models for the servo-feed systems of a“T”type ultra-precision machine tools. Based on these NN models, an adaptive MRAC can be devoloped to control and compensate its non-linearities.]]></description>
<pubDate>2014/5/28 9:47:30</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Xie Xuhui<sup>1</sup>,Li shengyi<sup>1</sup> and C. JimesLi<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Xie Xuhui<sup>1</sup>,Li shengyi<sup>1</sup> and C. JimesLi<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199703015]]></guid><cfi:id>338</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A New Type of Starter for Racing Boats]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199703016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A new type device for fixing and starting racing boats is described in this paper. The device mainly consists of float platform, back fixing units and side supporting ones. It is unnecessary to operate under water and the system can be moved easily for changing racing range because the whole system floats on water. Application in the 1st World Dragon-boat Championship proves that it is simple to produce, easy to use and reliable. The PRC patent number of the device is 95236969. 9.]]></description>
<pubDate>2014/5/28 9:47:30</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Shen Huairong and Xie Liangpu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Shen Huairong and Xie Liangpu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199703016]]></guid><cfi:id>337</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Study on Fault Detection System for Motor's Engine via the Intelligent Diagnostic Method]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199703017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming directly at the problem of detecting the motor's engine fault effectively, a hybird expert system method which combines the artificial neural network with the traditional expert system is presented, taking into consideration the characteristrics of the engine's structure. The structure, the composing and working procedure of the intelligent diagnostic system used for fault detection of motor's engine are studied and discussed. An example for application is also given in this paper.]]></description>
<pubDate>2014/5/28 9:47:30</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Li Yue,Wen Xisen and Chu Weihua]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Li Yue,Wen Xisen and Chu Weihua</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199703017]]></guid><cfi:id>336</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Parameter Selecting and Precision Controling for the Belt Grinding of Rotary thin-Wall Parts]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199702007]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper analyses the relation between the cutting force and cutting depth in the course of belt grinding, builds the mathematics model of optimum cutting parameter to improve efficiency and intensity, and proposes the processing method for controlling griding precision of rotary thin-wall parts.]]></description>
<pubDate>2014/5/28 9:47:10</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Dai Yifan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Dai Yifan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199702007]]></guid><cfi:id>335</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Variational Method of Ultra-precision Machine Tool Accuracy Analysis and Its Application]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199702008]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper is concerned with accuracy analysis of ultra-precision machine tools. Accuracy analysis is very important in ultra-precision manufacturing in metal cutting as well as machine tools design. A workable method based on variational analysis is presented in this paper. Using this method, we deduce a mathematical model of our ultra-precision aerostatic marble machine tool. Its output accuracy is analyzed here. We also point out the source and explain the physical meaning of machine errors. Finally we discuss its potential application in the design of ultra-precision machine tool.]]></description>
<pubDate>2014/5/28 9:47:10</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Zhu Jianzhong,Li Shengyi and Huang Kai]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Zhu Jianzhong,Li Shengyi and Huang Kai</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199702008]]></guid><cfi:id>334</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Shape-Preserving Curve Fitting in CAD]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199702019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper presents shape-preserving algorithm, the cubic parametrical curve is constructed between two cosecute data points, the resulted interpolating spline curve is local, shape-preserving and G<sup>2</sup>-continuous.]]></description>
<pubDate>2014/5/28 9:47:11</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Tang Yu,Huang Guoli and Wang Xingbo]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Tang Yu,Huang Guoli and Wang Xingbo</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199702019]]></guid><cfi:id>333</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on the Key Machining Technology of Prceision Non-circular Bearings of the Aero Gas Turbine Engine]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199701003]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[For high speed roller bearings used in aircraft engine, the roller's slipping is one of the main causes which result in bearing damage. A kind of new roller bearings having non circular inner race is proved to be a valid method to solve the slipping problem. In this paper, a strategy to grinding the trilobed inner race by using linear motor control technique is presented and illustrated. Practical machining experiment has been made and machining results are satisfactory.]]></description>
<pubDate>2014/5/28 9:46:38</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Fan Dapeng<sup>1</sup>,Yin Ziqiang<sup>1</sup> and Yang Yi<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Fan Dapeng<sup>1</sup>,Yin Ziqiang<sup>1</sup> and Yang Yi<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199701003]]></guid><cfi:id>332</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Research on the Mathmatical Model of Servo Feed System Ultra-precision Diamond Lathe]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199701004]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In this paper, the transfer function of the servo feed system is analysized. Based on this, the frequency domain modeling and time domain modeling methods are adopted to build the servo feed system frequency domain and time domain models.]]></description>
<pubDate>2014/5/28 9:46:38</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Xie Xuhui,Liao Dezhi and Li Shenyi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Xie Xuhui,Liao Dezhi and Li Shenyi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199701004]]></guid><cfi:id>331</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Situation Summarization of Environment Experiment Technology and Integration Environment Stress Experiment&Analysis System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199806018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on elaborating the basic intension of Environment Reliability Experiment Technology (ERET), this paper analyses the general development of ERET in our country, as well as the main existing problems. Moreover, from the angle function integration and information integration, the paper proposes a future mode of ERET and describes its main functions as well.]]></description>
<pubDate>2014/1/3 16:01:53</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Chen Xun and Wen Xisen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Chen Xun and Wen Xisen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199806018]]></guid><cfi:id>330</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on Model of PAI-CAD/CAM and Developing Technique]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199806019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Due to the appearance of the Agile & Virtual manufacturing and global manufacturing system, the old CAD/CAM system can't be applied to product development of virtual enterprises and a new CAD/CAM system must be developed. According to our national conditions, this paper discusses a new CAD/CAM system-Pseudo-Agile Intelligent CAD/CAM(PAI-CAD/CAM) system.]]></description>
<pubDate>2014/1/3 16:01:53</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Tang Luosheng,Li Shengyi,LiuYang and Liu Zhuozhi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Tang Luosheng,Li Shengyi,LiuYang and Liu Zhuozhi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199806019]]></guid><cfi:id>329</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Identification for Instant False Alarm in Complex Equipment Based on the Measures of Grey Correlation and Fuzzy Nearness]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199805010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In the paper the creative causes and protective measures to the instant false alarm, which is one of the types of false alarms taking place in the BIT(Built In Test) system of electronics or weapon equipments, are analyzed. The basic theories of grey correlation and fuzzy neamess are offered in order to identify the instant false alarm. The environment al samples group(which are parameters of the temperature, humidity, power or vibration)and instant false alarm sample(which is due to the suddenly varying of vibration or power parameter) are got by both computer and physical simulation. Those samples are analyzed according to the measures of grey correlation and fuzzy neamess, the relationship between the sudden varying of vibration or power parameter and the instant false alarm are identifed. The results testify that the measures offered in the paper are practical in the recognization the instant false alarm.]]></description>
<pubDate>2014/1/3 0:00:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Zhang Yu and Wen Xisen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Zhang Yu and Wen Xisen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199805010]]></guid><cfi:id>328</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Rapid Iterative Method Iterating the Recess Pressure and Its Partial Derivatives of Hybrid Bearings]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199805011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on the continuity equation and its partial derivative equation, tieratie criterions and formula iterating the recess pressure and its partial derivatives of capillary compensated hybrid journal bearings have been established in this paper. The results show that this iterative method needs only a few iterations, it is suitable for various situations and clear in physical meaning, it can save a lot of computing time by applying it in a finite element method software which calculates the static and dynamic performances of capillary compensated hybrid journal bearings.]]></description>
<pubDate>2014/1/3 16:01:38</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Deng Guiling<sup>1</sup>,Jiang Bingyan<sup>1</sup> and Zhu Jun<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Deng Guiling<sup>1</sup>,Jiang Bingyan<sup>1</sup> and Zhu Jun<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199805011]]></guid><cfi:id>327</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Principle and Device of Measuring the Pitch Diameter of a large Diameter Sawtooth Thread with Single Ball]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199805012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper describes the priciple and method of measuring the pitch diameter of a large diameter sawtooth thread with a single ball, and introduces in detail the measuring device to realize the method. Tests and calibration are also given, which show that this device is easy to operate, and has high accuracy and good practicbility.]]></description>
<pubDate>2014/1/3 16:01:38</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Wu Yulie,Xu Rongbao,Zhang Yaohui and Wang Xiumei]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Wu Yulie,Xu Rongbao,Zhang Yaohui and Wang Xiumei</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199805012]]></guid><cfi:id>326</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Modelling and Simulation of Virtual Machining Process]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199804008]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In this paper, a virtual machining process which can simulate the real process is advanced and established, so the problems in the machining process can be predicted, evaluated and solved before cutting pars. Its structure, modelling technology and simulation process are also described.]]></description>
<pubDate>2014/1/3 16:01:26</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Liu Zhuozhi<sup>1</sup>,Li Shengyi<sup>1</sup>,Wang Luo<sup>1</sup>,Tang Luosheng<sup>1</sup>,Wei Guilin<sup>2</sup> and Liu Xijie<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Liu Zhuozhi<sup>1</sup>,Li Shengyi<sup>1</sup>,Wang Luo<sup>1</sup>,Tang Luosheng<sup>1</sup>,Wei Guilin<sup>2</sup> and Liu Xijie<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199804008]]></guid><cfi:id>325</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Condition Monitoring and Fault Prediction of Mechanical-Electronic Systems of Flexible Machining Devices Based on Dynamics Model]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199803018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on the dynamics models and their identification of mechanical-electronic systems of flexible machining devices, we have built up a real condition monitoring model which includes BAYES fault detection, abrupt fault detection and fault analysis&location. Utilizing the Kullback information distance and the multilevel hierarchical AR model, we have realized the prediction and alarming of faults of flexible machining devices. The experiments on the JCS-020 Machine Center have indicated the models are feasible and valid. They can properly eliminate the influence of the changeful machining mode and process, the factors of time-varying and random disturbances on the condition monitoring, fault diagnosis and prediction, and greatly improve robustness and adaptability of monitoring and diagnosis in the FMS environments.]]></description>
<pubDate>2014/1/3 0:00:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Qiu Jing,Wen Xisen and Hu zheng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Qiu Jing,Wen Xisen and Hu zheng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199803018]]></guid><cfi:id>324</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Semi-Ductile Regime Grinding of Hard-Brittle Material by Creep Feed Method]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199803019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In this paper, the semi-ductile regime grinding mechanism by creep feed method is analysed. A new fracture ratio is defined to measure the effect of semi-ductile regime grinding. The experimental method and the experimental equipment are presented. The experimental results are analysed and compared. The experimental results show that the semi-ductile regime grinding of hard-brittle material can be carried out in a universal grinding machine tool, and the grinding effect can be improved remarkably by the creep feed method.]]></description>
<pubDate>2014/1/3 0:00:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Zhang Yaohui,Ke Hongfa,Wen Xiaoxi and Xu Rongbao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Zhang Yaohui,Ke Hongfa,Wen Xiaoxi and Xu Rongbao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199803019]]></guid><cfi:id>323</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Dynamic Analysis of a Ultraprecision Twist-roller Friction Drive]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199803021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[For ultraprecision positioning, the use of the twist-roller friction drive is proposed. In this paper, it's structure and principle are analyzed, and new conclusion is reached.]]></description>
<pubDate>2014/1/3 16:01:17</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Luo Bing<sup>1</sup>,Li Shengyi<sup>1</sup> and Li Aili<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Luo Bing<sup>1</sup>,Li Shengyi<sup>1</sup> and Li Aili<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199803021]]></guid><cfi:id>322</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Dynamic Models and Their Identification of Mechanical-Electronic Systems of the Flexible Machining Device]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199802008]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on the analysis of the system structure, information flow path of the flexible machining device, we have built up the precise dynamic model of mechanical-electronic systems of the machining center, and developed the hardware to realize the real-time identification of parameters of the models. It is a strong base both for building up a real-time condition monitoring, fault diagnosis and prediction system and for getting rid of the influence of the changeful machining mode and the factor of time-varying in the FMS environments.]]></description>
<pubDate>2014/1/3 0:00:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Qiu Jing,Wen Xisen and Hu Zheng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Qiu Jing,Wen Xisen and Hu Zheng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199802008]]></guid><cfi:id>321</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Model and Simulation of Antenna-Shaped Optical Fiber Sensor]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199802018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The reflective itensity-modulated optical fiber sensor for measuring displacement, the antenna-shaped optical fiber sensor, is usually composed of a fiber bundle with the emitting and receiving fibers in a specific arrangement at the probe tip. The three elementary types of fiber arrangement are: concentric distribution, semicircular distribution and random distribution. In comparison with the size of the optical fiber sensor, the thickness of clad and binding element of the fibers is so small that it can be ignored. The mathematical models of the modulation function for the single fiber couple composed of both an emitting fiber and a receiving one are presented. After analyzing the distribution of the fibers inside the optic fiber sensor by using the geometric and statistical theories, the general mathematical models of modulation function for the three types of the sensors mentioned above are proposed. And all the models are simulated with computer and all the simulating results are briefly analyzed.]]></description>
<pubDate>2014/1/3 16:01:05</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Li Qiongwei and Lv Haibao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Li Qiongwei and Lv Haibao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199802018]]></guid><cfi:id>320</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Self Generating Radial Basis Function Neuro-Fuzzy Fault diagnosis Model and its Application]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199801007]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In this paper, we propose a fault diagnosis model and its training algorithm based-on self generating radial basis function (SGRBF) fuzzy neuros. Two examples for the diagnosis of bearing and gear faults using this model are also given. Finally. some conclusion is drawn.]]></description>
<pubDate>2014/1/3 16:00:53</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Qin Guojun,Hu Niaoqing and Wen Xisen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Qin Guojun,Hu Niaoqing and Wen Xisen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199801007]]></guid><cfi:id>319</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A method of Fuzzy Set for Tool Condition Monitoring]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199801008]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In this paper，a new method of tool condition monitoring in milling by fuzzy set theory has been studied，the relationship between the tool conditions and monitoring indices (features) is described by a linear fuzzy equation，the parameters of this equation are determined in accordance with the possibility and the probability distributions of the learning samples. In order to verify its effectiveness，the controlled experiments of tool condition monitoring in milling has been made. the results show that it is effective to tool condition monitoring.]]></description>
<pubDate>2014/1/3 0:00:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Wu Xuezhong,Li Shengyi and Fan Dapeng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Wu Xuezhong,Li Shengyi and Fan Dapeng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199801008]]></guid><cfi:id>318</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on Aviation Conical Gear Transmission CAD System Based on AutoCAD]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199906026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This system is a child system of aviation reducer CAD system. It reasearches on the conical gear which is the key spare part in the aviation reducerr. Based on AutoCAD desk and compiling procedure with ADSRX and C++ language, it realizes the integration of routine design, verifying caculation, optimization design and parametric drawing. Practice proves that the routine design of this system is right and result of optimization design is perfect, has high engineering applying value.]]></description>
<pubDate>2013/11/18 0:00:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Xu Xiaojun,Pan Cunyun,Shangjianzhong and Xia Zunfeng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Xu Xiaojun,Pan Cunyun,Shangjianzhong and Xia Zunfeng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199906026]]></guid><cfi:id>317</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Mathematical Model of Boundary Scan Test]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199905022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Boundary-Scan Technique(BST) is a new and effective way of test and design-for-testability for VLSI circuits. In order to use BST more efficiently, it is necessary to study the basic theory of boundary-scan test thoroughly and precisely. In this paper, A mathematical model of boundary-scan test process is set up based on Boolean Matrix theory. Then, by applying the model established, two boundary-scan test generation principles are presented. The first one gives the sufficient condition for fault detection in boundary-scan test. The second gives the sufficient condition for fault isolation and diagnosis in boundary scan test. The mathematical model and its deduction constitute the theoretical basis of boundary scan test, which can be used in developing test generation algorithms with better property.]]></description>
<pubDate>2013/11/18 15:32:32</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Hu Zheng and Wen Xisen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Hu Zheng and Wen Xisen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199905022]]></guid><cfi:id>316</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Spherical Gear with Ring Involute Teeth Profile and It's Manufacture by Generating Method]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199905023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The spherical gear formed by attributing ring teeth on a spherical face is a new type of gear. The spherical gear device can be used to deliver spherical motion. In order to popularize its application, it is necessary to study its manufacture. Base on the study of configuration characteristic of the spherical gear, extending the generating method principle of general gear's manufacture to the spherical gear's manufacture, we ratiocinate out the generating method principle of spherical gear's manufacture. On precondition of applying generating method, we design the scheme of turning and milling of the spherical gear, and we work out a suit of device accessioned on the lathe for manufacturing spherical gears. It provides a basic means for studying the manufacture of spherical gears.]]></description>
<pubDate>2013/11/18 15:32:32</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Chen Ge,Pan Cunyun and Shang Jianzhong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Chen Ge,Pan Cunyun and Shang Jianzhong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199905023]]></guid><cfi:id>315</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Ultraprecision Air Bearing Capacitive Sensor System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199905024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper presents an ultraprecision air bearing capacitive sensor with high resolution. It combines the air bearing gauge head with a square guideway with the microminiature capacitive sensor, ensuring high accuracy and high frequence response It's suitable for ultraprecision contact measurement.]]></description>
<pubDate>2013/11/18 15:32:32</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Dai Yifan,Wang Xinfeng and Wu Yulie]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Dai Yifan,Wang Xinfeng and Wu Yulie</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199905024]]></guid><cfi:id>314</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Decreasing False Alarm of Mechantronics Equipment Built-in Test Based on Neural Network]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199904023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The significant problem of mechantronics equipment built-in test (MEBIT) is its high false alarm rate. One of the important causes is its sensor channel's fault of BIT system. The method of neural network is adopted for the sensor channel fault diagnosis. The fault mechanism and types of sensor channels of MEBIT in a large ship power engine and the fault samples are obtained. After the training of neural network, the actual system's faults are diagnosed and identified. The experimental results show that the neural network can diagnose the faults and identify their types. The method is compact, effective and of practical value.]]></description>
<pubDate>2013/11/18 15:32:47</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Xu Yongcheng,Tao Liming,Wen Xisen and Yi Xiaoshan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Xu Yongcheng,Tao Liming,Wen Xisen and Yi Xiaoshan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199904023]]></guid><cfi:id>313</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Cubic Rational Bezier Spline Curve With A Given Set of Tangents of Chain Wheel]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199904029]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The mathematical description of chain-wheel drives with two fixed non-cricular wheels, a transmission chain of constant length and g give non-costant velocity-ratio leads to a system of nonlinear functional equations. It seems impossible to solve this equations, but we can construct a set of tangents of thesse wheels by kinematic methods. The desired curve can be approximated by constructing spline curve. This paper considers piecewise raional cubic Bezier curve which has all these tangents as tangents, the curve is G<sup>2</sup>-continuous and shape-preserving.]]></description>
<pubDate>2013/11/18 15:32:47</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Ming Xiaoping]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Ming Xiaoping</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199904029]]></guid><cfi:id>312</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Third-order Contact Theory for Machining Sculpture Surface]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199903026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper introduces a new theory that the concept in differential geometry of “contact”between curve and camber is applied to numbercally controlled machining sculpture surface. It puts forward the optimum contact condition for machining sculpture surface using cylindrical tool or bevel cutter with five coordinates co-operating.]]></description>
<pubDate>2013/11/18 15:33:04</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Li Guoshun,Pan Difu and Lui Huran]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Li Guoshun,Pan Difu and Lui Huran</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199903026]]></guid><cfi:id>311</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Design and Research of Full-Automatic Packaging Metric Equipment]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199903027]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Full-automatic metric equipment can replace the traditional metric tool, Based on the combination of MCU-kernel intelligent controller and new -type packaging mechanism. The packaging metric equipment can accomplish weighing, bag-nipping, unloading and packaging automatically. This paper presents its principle, architecture and characteristics.]]></description>
<pubDate>2013/11/18 15:33:04</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Liu Shiming,Song Zhibing,Tan Wenruo and Yu Weigang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Liu Shiming,Song Zhibing,Tan Wenruo and Yu Weigang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199903027]]></guid><cfi:id>310</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on the Conveyor of Flow Iiquid Powder]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199903028]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To reduce the labor intensity for the environmental and building workers and improve the efficiency, the new machine is built based on the working principles of the old helix conveyor. The helix slice is changed in to flex coupling from rigid coupling, and its hard tube is changed in to soft one. After experiments, a certain technological parameters have been chosen to improve coordination between the rigid helix slice and soft tube, and to realize helix conveyor mechanism. It can convey mortar when the conveyor is somewhat curved. The research is of certain practical value and social significance. Since the technique is not complicated, it is easy to popularize.]]></description>
<pubDate>2013/11/18 15:33:04</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Wan Shiwen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Wan Shiwen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199903028]]></guid><cfi:id>309</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on Twist-roller Friction Drive System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199902022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Twist-roller friction drive system combining friction drive with screw drive, has many features such as good dynamic characteristic of friction drive and small lead of screw drive. This paper presents a kind of twist-roller friction drive system. Its lead is less than 0.2mm, the stroke is about 250mm, and the resolution is several nanometer. It is composed of twistroller friction drive mechanism, static air bearing guideway and relative parts. It is a new kind of drive system with large stroke and very high resolution.]]></description>
<pubDate>2013/11/18 15:33:34</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Dai Yifan,Li Shengyi,Luo Bing and Peng Li]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Dai Yifan,Li Shengyi,Luo Bing and Peng Li</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199902022]]></guid><cfi:id>308</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Design and Development of Corrugated Paper Synchro Cutting Control System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199902023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper presents the design of the corrugated paper synchro cutting control system. This system consists of the DC moter speed control system and the micro-computer control system. The linear quadratic optimum regulator was adoped to design the DC motor speed contrd system. The double CPUs technique of single chip microcomputer was adoped to design the computer control system. So, it's a system of great power and high precision. Rapid response, high precision, high reliability and convenient operation are characteristic of the system.]]></description>
<pubDate>2013/11/18 15:33:34</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Ren Yongyi,Pan Mengchun,Weng Feibing and Qu Yuanxin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Ren Yongyi,Pan Mengchun,Weng Feibing and Qu Yuanxin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199902023]]></guid><cfi:id>307</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Application of Intelligent Theory to the Built-in Test Design and Fault Diagnosis]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199901024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[During the last twenty years, the theory and application of built-in test (BIT) have made prominent progress. The BIT technology has been the effective method of improving product's testability and diagnosis ability. The paper summarizes the trait of BIT technology, analyzes its developing trends all over the world, and generalizes the intelligence of BIT during its phrases of system design, information process and synthetic decision, then synthetically analyzes the application to BIT of expert system, neural network, fuzzy theoetic, information fusion and other intelligent theories and builds up the theory frame of intelligent BIT.]]></description>
<pubDate>2013/11/15 15:37:25</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Wen Xisen,Xu YongCheng and Yi Xiaoshan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Wen Xisen,Xu YongCheng and Yi Xiaoshan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199901024]]></guid><cfi:id>306</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Wind Tunnel Experimental Investigation of Decreasing Aerodynamic Drag of Increasing Speed Train]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199901025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Increasing speed makes aerodynamic drag of train increase obviously. To decrease aerodynamic drag, it is important to improve aerodynamic contour of train. Experiment results show that a little change of partial contour of train can greatly decrease aerodymic drag. This is an effective way to decrease aerodynamic drag of increasing speed train.]]></description>
<pubDate>2013/11/15 15:37:25</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Zou Jianjun<sup>1</sup>,Chen Hong<sup>1</sup>,Wu Guifu<sup>1</sup> and Chen Nanyi<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Zou Jianjun<sup>1</sup>,Chen Hong<sup>1</sup>,Wu Guifu<sup>1</sup> and Chen Nanyi<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199901025]]></guid><cfi:id>305</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Multitarget Optimization Design on V Belt Wheel-system of Noise Experimental Table of Main Carriage Reduction Gear]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199901026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The V belt wheels of noise experimental table of main carriage reduction gear must suit drive ratio, be lightest in weight and least in moment of inertia. Therefore we make use of the multitarget optimization to design the V belt wheels. The better result in the use of engineering reality is obtained.]]></description>
<pubDate>2013/11/15 15:37:25</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Li Kean<sup>1</sup> and Tang Yingshi<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Li Kean<sup>1</sup> and Tang Yingshi<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/199901026]]></guid><cfi:id>304</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Numerical Anlysis of Rub-impact Phenomena of Nonlinear Rotor Systems]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200006022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A rub-impact model of nonlinear rotor system is built.Based on the model and using numerical calculation,the responses of nonlinear rub-impact rotor systems,such as period-one motions,sub-harmonic and super-harmonic vibrations,quasi-periodic motions and chaotic motions,are investigated.Nonlinear vibration characteristics of a rub-impact rotor revealed in this paper are of great significance to the condition monitoring and diagnostics of the rotor system.]]></description>
<pubDate>2013/11/18 15:31:16</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[HU Niaoqing,CHEN Min,LIU Yaozong,YANG Guang and WEN Xisen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HU Niaoqing,CHEN Min,LIU Yaozong,YANG Guang and WEN Xisen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200006022]]></guid><cfi:id>303</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Two Topological Problems and Their Solutions in Testability]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200006023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[During the last decade, in order to solve the test problem of complex electronic system, the concept of testability has been accepted by more and more researchers and engineers. Its techniques have also developed very quickly. In testability, how to optimize the design and test    approach of various systems to reduce the total cost is very important. Applying topology theory, we build up the topological descriptive model of the two typical optimization problems in testability, and then develop their optimal solving algorithms respectively.]]></description>
<pubDate>2013/11/18 15:31:16</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[HU Zheng,LI Qiongwei and WEN Xisen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HU Zheng,LI Qiongwei and WEN Xisen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200006023]]></guid><cfi:id>302</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research of a Reflective Fiber-optic Displacement Sensor with Intensity Compensation]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200006024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A reflective fiber-optic displacement sensor of three probes with equal transverse space is introduced. The sensor can perform automatic compensation by two receiving optical fibers. The compensation mechanism of this sensor is analyzed in detail, and at the same time the displacement modulating function and corresponding simulating curves are presented. Results show that this sensor can effectively eliminate the influence to output characteristics caused by power fluctuation, difference of surface reflectivity and transmission loss.]]></description>
<pubDate>2013/11/18 15:31:16</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[XU Tao,LU Haibao,YANG Huayong and CHEN Xiaolu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Tao,LU Haibao,YANG Huayong and CHEN Xiaolu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200006024]]></guid><cfi:id>301</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Study of the Chaos of Non-linear Fabry-Perot Resonator]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200006025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on the basic theory of chaos dynamics,Lyapunov exponential index number of the difference equation,controlling the dynamical characteristics of Non-linear Fabry-Perot(NFP) resonator,has been calculated. Using the relationship between Lyapunov exponential index number  and NFP, the dynamical characteristics of NFP have been studied. The parameter region of the NFP outputs stable intensity, and the mechanism of conversion from stable state to chaos, have been analyzed and made out.]]></description>
<pubDate>2013/11/18 15:31:16</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[YUAN Shengfu and JIANG Zongfu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YUAN Shengfu and JIANG Zongfu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200006025]]></guid><cfi:id>300</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Feeding Complex Electrodes through Twist Channels of Rimed Turbine Blisks]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200005019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The finishing of turbine blisks, a critical technology determining the final geometric accuracy of blisks, can be implemented efficiently with the electrical discharge machining ( EDM). Upon the basis of the design of the electrode for blisk EDM finishing, the searching of an interference-free path for feeding an electrode through twist channels of a rimed blisk is carried out, in which the kernel problem is the determination of the electrode kinematic constraints. An implementation of the path-searching algorithm is illustrated with an example at the end of the paper.]]></description>
<pubDate>2013/11/18 15:30:33</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHAO Wansheng,ZHAN Hanjing,WANG Gang and LIU Wentao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHAO Wansheng,ZHAN Hanjing,WANG Gang and LIU Wentao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200005019]]></guid><cfi:id>299</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[FIR Model Identification and Precision Analysis under Invert-Repeated m-Sequences Input]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200005020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper is aimed at analyzing the identification precision of the finite impulse response (FIR) function models of discrete-time control systems under the pseudo-random invert-repeated m-sequences stimulation1 An explicit formula of the correlation identification precision is given in the face of colored noises. Two simulation examples are cited to support the analyses.]]></description>
<pubDate>2013/11/18 15:30:33</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[HU Dewen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HU Dewen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200005020]]></guid><cfi:id>298</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Diagnosis of DTG Based on Parameter Estimation Method]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200005021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A parameter estimation method is proposed for Dynamic Tuned Gyro (DTG) fault diagnosis based on kinetics model of rotor. Fault simulation and diagnosis experiments are carried out on the DTG of a strapdown inertial navigation system. The results show that the parameter estimation method is very efficient and practical, providing a new approach and idea for the gyro fault diagonsis.]]></description>
<pubDate>2013/11/18 0:00:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[YANG Dingxin,TAO Junyong and TAO Limin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YANG Dingxin,TAO Junyong and TAO Limin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200005021]]></guid><cfi:id>297</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Fourier Analysis for Precision Displacement Measurement with a Doubly Blazed Reference Grating]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200003022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In this paper, the fundamental principle of precision displacement measurement with a doubly blazed grating is analyzed in detail by means of Fourier Optics. The mathematical expressions about the amplitude and the intensity of diffracted light are derived, and the measurement formula is presented. At the same time it is indicated that moire fringes are nearly perfect two-beam interference fringes with superb contrast. These conclusions are consistent with the theoretical and experimental results given by Post D, and helpful to further development of the measurement principle.]]></description>
<pubDate>2013/11/18 0:00:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LU Haibao,XU Tao,YANG Huayong,CAO Juliang,SU Shaojing and WANG Gang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LU Haibao,XU Tao,YANG Huayong,CAO Juliang,SU Shaojing and WANG Gang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200003022]]></guid><cfi:id>296</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[An Analysis of the Accuracy for Strainghtness Measurement with EST Method]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200003023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on the study of the new requirements of the precision and ultraprecision machine technique for the error separation technique of straightness measurement, this paper analyzes quantificationally the error introduced into the time domain and frequency domain EST results by the misalignment of sensors, the neglect of yaw angle in sequential two-point method and the difference of drifting of these sensors. This paper also describes quantificationally the magnifying ability for measurement errors of the factors W(k) in frequency domain EST methods. Some measures were taken to reduce this influence. The conclusion that sequential two-point method is the best fit method for straightness measurement was arrived at the end of this paper.]]></description>
<pubDate>2013/11/18 15:30:59</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WANG Xianping and LI Shengyi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Xianping and LI Shengyi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200003023]]></guid><cfi:id>295</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Development of Boundary-scan Tester Software System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200003026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Bounadary-scan technology is being accepted by most engineers as a design-for-Testability technique and plays an important role in the test and fault diagnosis of electonical devices. In this paper, a boundary-scan prototype tester is introduced. Some problems in developing its software system are emphasized.]]></description>
<pubDate>2013/11/18 15:30:59</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[YOU Fang,QIAN Yanling and HU Zheng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YOU Fang,QIAN Yanling and HU Zheng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200003026]]></guid><cfi:id>294</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Typical Application of MEMS-Micro-Instruments]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200002021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[MEMS is widely considered as one of booming new technologies, and as its typical application, micro-instruments have unparalled advantage compared with traditional instruments, this article outlined the concept, characteristics and its application, some personal viewpoints about micro-instruments are forwarded.]]></description>
<pubDate>2013/11/18 15:32:05</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[DING Henggao and YUAN Zuwu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>DING Henggao and YUAN Zuwu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200002021]]></guid><cfi:id>293</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Ultra-precision Machine Tools and Development of the Latest Technology]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200002022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper describes ultra-precision machining technology together with its application background and the latest development of its key points. 
    The accuracy target and the trend of modularization and low cost are described in detail from the view of spreading application of ultra-precision machining technology. Under the consideration of promoting technology level, the latest achievements in some key technologies are reviewed. These key technologies include modular component, actuating system, measurement technology, CNC system and environment controlling.]]></description>
<pubDate>2013/11/18 15:32:05</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LI Shenyi,DAI Yifan and PENG Xiaoqiang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Shenyi,DAI Yifan and PENG Xiaoqiang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200002022]]></guid><cfi:id>292</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Information Compressing Algorithm in Boundary-Scan Test]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200002023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to solve the problem of the test pattern optimal generation in boundary-scan test, a new algorithm, called test matrix compress algorithm, is presented. In the new algorithm, firstly, set up the limited-short-fault-Model applying the structural information of the circuit board on test; then, based on the limited-short-fault-Model, carry out compressing process on the complete test matrix to generate optimal test matrix. The main idea of this algorithm is to remove invalid or redundant information from test matrix to the greatest extent, while keeping the effective test information. Through theoretic analysis and experimental validation, it is proved that the algorithm can get good optimization result and achieve great test information compressing ratio by this algorithm.]]></description>
<pubDate>2013/11/18 15:32:05</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[HU Zheng,YI Xiaoshan and WEN Xisen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HU Zheng,YI Xiaoshan and WEN Xisen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200002023]]></guid><cfi:id>291</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on Multi-axes Vibration Control Technology with Random Exciting]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200001016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at the multi-axes vibration control with random exciting, starting from the supposition of multi-input and multi-output linear system ,  the paper deals with equalization control method, exciting spectrum matrix simulation and control system design. Based on the study, the paper proposes a closeloop control arithmetic for multi-axes vibration control with random exciting. The simulating calculation proves that this arithmetic is valid. Finally, the paper offers a scheme of the control system including hardware and software.]]></description>
<pubDate>2013/11/18 15:30:12</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[CHEN Xun and WEN Xisen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Xun and WEN Xisen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200001016]]></guid><cfi:id>290</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on Real-time Measuring System about Position Posture of Motional Object with Four Beams of Laser and Position Sensitive Detector]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200001017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper introduces a new method of optical non-contact measurement, by using four beams of laser and position sensitive detector to measure position and angles, so as to determine position's posture of the motional object at some instant. The analysis and research on the internal composition of the system and its signal processing are made. The experiment proves that the system has many advantages: high accuracy, good restability, fast response, wide measurement range, composition compactness and low cost. So, this measuring system has a good future to apply in industry because of its attractive performance/ cost ratios.]]></description>
<pubDate>2013/11/18 15:30:12</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LI Guoshun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Guoshun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200001017]]></guid><cfi:id>289</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Bending Rigidity CAD of Complex Structure Shaft Parts]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200001018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The shafts with inner and outer cones is applied widely to aviation machine, but the definite calculating approach of their rigidity isn't given in current machine design manuals. The problem to be solved in calculating bending rigidity of shaft parts with computer is discussed, and an approach of calculating bending rigidity of shafts with inner and outer cones is introduced, and implemented by ADS developing tools in Auto CAD.]]></description>
<pubDate>2013/11/18 15:30:12</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[XIA Zunfeng,PAN Cunyun and SHANG Jianzhong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XIA Zunfeng,PAN Cunyun and SHANG Jianzhong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200001018]]></guid><cfi:id>288</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A New Method for Singularity Analysis of Parallel Manipulators]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200106021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on the property of configuration space of parallel manipulators and by using differential geometry and topology, this paper proposes a new approach for the classification of singularity of parallel manipulators, two types of singularity are obtained, i.e, topology singularity and parameterization singularity. Also comparisons with existing classification methods are made.]]></description>
<pubDate>2013/8/21 9:51:19</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WU Yulie<sup>1</sup>,WU Xuezhong<sup>1</sup>,LIU Guanfeng<sup>2</sup> and LI Shengyi<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WU Yulie<sup>1</sup>,WU Xuezhong<sup>1</sup>,LIU Guanfeng<sup>2</sup> and LI Shengyi<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200106021]]></guid><cfi:id>287</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Roundness Measurement of High-speed Precision Spindle]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200106022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In the test of high-speed precision spindle,the high speed may make error separation impossible. In this paper, model analysis is applied to testify the possibility of error separation. Then the error due to testing with precision spindle instead of precision ball is analyzed, and  the setup error of sensors is analyzed as well.]]></description>
<pubDate>2013/8/21 0:00:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WANG Jianmin,DAI Yifan and WANG Xianping]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Jianmin,DAI Yifan and WANG Xianping</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200106022]]></guid><cfi:id>286</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Adaptive Control System for Automotive Braking Aid]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200105025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A model of the automotive braking aid presented in this paper is based on Gauss-Seidel algorithm. Based on the model, a hyper-stable model reference adaptive controller for braking aid is designed for automotive collision warning system. All of the study has been carried out on a “Software & Hardware Hybrid d Platform for Simulation of Engineering Systems Using Matlab Toolbox/Simulink". The results of software and hardware simulation are quite consistent, which demonstrates the functionality and effectiveness of this system and experimental methodology for controlling the motor-speed and keeping the distance between automobiles under complicated circumstances.]]></description>
<pubDate>2013/8/21 9:51:32</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[PAN Zhongming]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>PAN Zhongming</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200105025]]></guid><cfi:id>285</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Survey on Wind Loads for Double-Deck Vehicle in Cross Wind]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200105026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on numerical simulation for double-deck vehicle in crosswind with different angle of attacks, it is found that the vehicle's three areodyramic coefficients become obviously large when the vehicle running on railroad 24m free supported bridge with T configure or on embankment, compared with those of considering the vehicle only. Accordingly, the affect of enlarged wind loads acting on the vehicle should be taken seriously.]]></description>
<pubDate>2013/8/21 9:51:32</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHU  Zhiwen<sup>1</sup>,CHEN  Weifang<sup>2</sup> and CHEN  Zhengqing<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHU  Zhiwen<sup>1</sup>,CHEN  Weifang<sup>2</sup> and CHEN  Zhengqing<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200105026]]></guid><cfi:id>284</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Application of Stochastic Resonance Theory for Detecting Weak Signals in Heavy Background Noise]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200104010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Noise in dynamical systems is usually considered a nuisance. But in certain nonlinear systems, the presence of noise can in fact enhance the detection of weak signal. This phenomenon, called stochastic resonance (SR), may find useful application in physical, technological and biomedical fields. A novel approach to detecting weak periodic signal using stochastic resonance theory is presented. This method is analyzed and validated by simulated signal. The result shows that this method is simple, robust and reliable. The weak sinusoid signal of lower signal-to-noise ratio can be reliably extracted from loud noise. The detection approach of weak signal based on SR indicates a promising prospect for mechanical fault diagnosis.]]></description>
<pubDate>2013/8/21 9:51:44</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[HU Niaoqing,WEN Xisen and CHEN Min]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HU Niaoqing,WEN Xisen and CHEN Min</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200104010]]></guid><cfi:id>283</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Universal Synthetic Volumetric Error Model of Multi-axis NC Machine Tool Based on Kinematics]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200104011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A novel methodology has been presented to build a synthetic volumetric error model of a multi-axis NC machine tool of arbitrary configuration. The model includes original position errors and motion errors that account for geometric errors owing to manufacture, installation and motion control inaccuracy, thermal errors from thermal deformation of tool, machine and workpiece and mechanical loading errors etc. Thus it describes the error's facts of a machine tool and is useful to real-time compensation of the overall errors within the machine's working volume specially. In order to develop the new model, multi-axis kinematics and homogeneous transform matrices are utilized. Finally, based on the proposed modeling theory and method, the error model of a 3-axis NC vertical machine tool is introduced. In addition, its 36 error components are analyzed.]]></description>
<pubDate>2013/8/21 9:51:44</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[SU Shiping,LI Shengyi and WANG Guilin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SU Shiping,LI Shengyi and WANG Guilin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200104011]]></guid><cfi:id>282</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research and Analysis on the Drive Principle of the Shifting Drive Bearing]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200104012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The shifting drive bearing is a new special type bearing with supporting function as well as speed change function.The design of mechanism is novel and well-knit,with high efficiency and load-bearing capacity.By studying the internal structure and the driving principle of the shifting drive bearing, a group of systematic analysis is made. The theoretical relations of the tooth number of the internal-tooth ring,moving-tooth and drive radio,are provided,as well as the optimum seeking scheme of high efficiency and low wearing and tearing. The conclusion is drawn that the tooth number of moving-tooth should be larger than the internal-tooth ring : Z<sub>2</sub>>Z<sub>1</sub>. It is very important to direct the design of the moving-tooth drive structure which has push-rod, including the shifting drive bearing.]]></description>
<pubDate>2013/8/21 9:51:44</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[YANG Kunyu and PAN Cunyun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YANG Kunyu and PAN Cunyun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200104012]]></guid><cfi:id>281</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Novel Torque Control Strategy—Vector Torque Control]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200104013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The paper proposes a novel strategy for torque control, namely vector torque control (VTC), taking into consideration the field orient control (FOC) and direct torque control (DTC). It sets up a function to resolve the problem that no definite relation exists between output vector and control variations in the conventional DTC. Also it improves the stator flux model at low speed. In the end, experimental results show that the proposed strategy can improve the output characteristics of induction motor.]]></description>
<pubDate>2013/8/21 9:51:44</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WU Jun,LI Shengyi and PAN Mengchun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WU Jun,LI Shengyi and PAN Mengchun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200104013]]></guid><cfi:id>280</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of the Effect on Intensity Modulation Functionof RIM-FOS Induced by the Obliquity of Reflector]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200103024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Among the theoretical and experimental research of the reflective intensity-modulated fiber optic sensor (RIM-FOS), a very important problem is always neglected, which is the effect on the intensity modulation caused by perpendicularity between the axis of fiber pairs and the reflector, i.e., the obliquity of the reflector.In the light of this, the mathematical analysis of this effect is performed.The simulation results of the RIM-FOS characteristic parameters with the different obliquity of the reflector are computed and the characteristic curves are plottedResults show that the obliquity of the reflector exerts great influence on the modulation function of the fiber pair.So advice is presented that the axis of fiber pair should be perpendicular to the reflector.]]></description>
<pubDate>2013/8/21 9:52:04</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[YANG Huayong,LU Haibao,XU Tao and YAN Shuhua]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YANG Huayong,LU Haibao,XU Tao and YAN Shuhua</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200103024]]></guid><cfi:id>279</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[PD Control of Redundant Parallel Manipulators]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200103025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Dynamic equations are derived using reduced tree model for close-chain mechanisms. The PD-based control strategy is employed to control the manipulators. In order to eliminate internal forces inherent in redundant mechanisms, a new method based on static force transformation is presented without forces feedback. Finally, a 2-DOF planar redundant parallel manipulator is utilized as the control example. Experimental results show the validity of the derived dynamic model and the proposed control method.]]></description>
<pubDate>2013/8/21 9:52:04</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WU Yulie,WU Xuezhong and LI Shengyi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WU Yulie,WU Xuezhong and LI Shengyi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200103025]]></guid><cfi:id>278</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Nonresonant Hopf Bifurcation of Van der Pol-Duffing Sytem]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200102023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In this paper,the problem of nonresonant bifurcation in nonlinerar oscillation system is studied,the response equation of bifurcation of the system is derived and the stability of Limit cycle is analyzed respectively.]]></description>
<pubDate>2013/8/21 9:52:19</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[PENG Jiehua<sup>1</sup>,TANG Jiashi<sup>1</sup>,YU Dejie<sup>1</sup> and LI Kean<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>PENG Jiehua<sup>1</sup>,TANG Jiashi<sup>1</sup>,YU Dejie<sup>1</sup> and LI Kean<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200102023]]></guid><cfi:id>277</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Application and Research on Over Modulation Technique for Space Vector PWM]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200102024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To output a large magnetic torque with low batteries voltage for electric vehicle drive system, two modes of over modulation for space vector PWM are presented. Experimental results show that they are fit for electric vehicle drives with increasing magnetic torque and output voltage.]]></description>
<pubDate>2013/8/21 0:00:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WU Jun,LI Shengyi,PAN Mengchun and SHAN Qingxiao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WU Jun,LI Shengyi,PAN Mengchun and SHAN Qingxiao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200102024]]></guid><cfi:id>276</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[An Overview on Active Noise Control Technology and Application]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200102026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[During the recent decade, the active noise control technology has becoming a hotspot of the noise controlling field, which is the extend and intercross of several subjects. Its ability of eliminating low frequency noise, light weight and compactness have been fully understood Firstly this paper simply introduce its theory. Then the actuality and nodus of its theory research, implementation technique and product at home and abroad are elaborated in full. Finally some problem of its practicability are analyzed further and several major developing directions are presented.]]></description>
<pubDate>2013/8/21 9:52:19</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[XU Yongcheng,WEN Xisen,CHEN Xun and WEN Jihong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Yongcheng,WEN Xisen,CHEN Xun and WEN Jihong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200102026]]></guid><cfi:id>275</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[New Fault Detection Method for the Integrated Navigation System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200101008]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A new fault detection method is proposed for the integrated navigation system. Fault detection is undertaken by checking the consistency between the global state estimate and the local state estimate of federated filter by means of the chi-square test (CST). Meanwhile, the fault isolation method is also discussed. The simulation and laboratory experimental results show that the new method is very efficient and practical; the reliability and safety of the system can be improved.]]></description>
<pubDate>2013/8/21 9:52:32</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[TAO Junyong,TAO Limin and YANG Dingxin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>TAO Junyong,TAO Limin and YANG Dingxin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200101008]]></guid><cfi:id>274</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Application of Chaotic Oscillators in Early Detecting Rub-impact Fault of Rotor System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200101009]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[On the basis of the characteristics of the Duffing equation's solutions, the chaotic oscillators are designed. This kind of oscillators can present the properties of sensitive dependence on weak signal and immunity to noise, so they can be used to detect the weak signals. This method can also be used in early detecting rub-impact fault of rotor system. The result shows that this method is simple and feasible.]]></description>
<pubDate>2013/8/21 9:52:32</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[CHEN Min,HU Niaoqing and WEN Xisen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Min,HU Niaoqing and WEN Xisen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200101009]]></guid><cfi:id>273</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Design of the Parallel X-Y Manipulator for High Speed Application]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200101010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A parallel x-y manipulator system for an epoxy writing application is developed. The best advantage of the system is a significant reduction in size of the present epoxy writing system. The other primary advantage is to increase rigidity of the parallel mechanism, thus ensur faster operation with higher accuracy and improved tracking performance. It shows that the tracking error is smaller than 0.5mm.]]></description>
<pubDate>2013/8/21 9:52:32</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WU Xuezhong,WU Yulie and LI Shengyi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WU Xuezhong,WU Yulie and LI Shengyi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200101010]]></guid><cfi:id>272</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on Technology of Auto Building Processing Table in CAPP System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200101011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A system for auto building processing tables is presented to meet the need of the application of  CAPP in enterprises.An universal model is built to deal with the processing tables,which takes the processing table of an enterprise as an instance and accordingly takes its types and requirements etc.as the properties of the above instance.The system adopts ODBC technology in order to offer an interface to interchange data among different systems such as MIS,PDM.It is proved that the system is of originality  universality and practicability.]]></description>
<pubDate>2013/8/21 9:52:32</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LIU Wukai,SHANG Jianzhong and PAN Cunyun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Wukai,SHANG Jianzhong and PAN Cunyun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200101011]]></guid><cfi:id>271</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on Process Information Selection and ProcessFlowsheet Creating in YHCAPP]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200206023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[YHCAPP system is an instrumental CAPP system oriented to middle or small enterprises. Its key question is how to select process information and create process flowsheet from CAD drawing. A method based on arithmetical expression evaluation is provided, which has successfully resolved the above question and has proved its correctness and credibility. The method also provides a new way of thoughts for general instrumental CAPP system.]]></description>
<pubDate>2013/8/21 9:49:43</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LIU Wukai,CHEN Sheng,SHANG Jianzhong and PAN Cunyun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Wukai,CHEN Sheng,SHANG Jianzhong and PAN Cunyun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200206023]]></guid><cfi:id>270</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Stability of Singularity in Parallel Manipulators]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200205009]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper introduces the concept of the critical points stability of the mapping theory into the singularity analysis of parallel manipulator and proposes the concept of stable singularity and unstable singularity. Some low degree-of-freedom parallel manipulators are researched into and the results verify that the classification of singularities according to their stability is reasonable. The proposed method can provide theoretic foundation for the structure design and control of parallel manipulators.]]></description>
<pubDate>2013/8/21 9:50:03</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[SHEN Hui,WU Xuezhong and LI Zexiang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SHEN Hui,WU Xuezhong and LI Zexiang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200205009]]></guid><cfi:id>269</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research of the Communication Methods Between Modulesof Open CNC System's Software Based on COM]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200205012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Methods of software design based on COM are used to modularize the CNC systems and the crux is communication. “Event” and “Event slot ” are used to realize the communication between different client component modules and between client and sever. It provides a new software method of the solution to the communication problem of open CNC system.]]></description>
<pubDate>2013/8/21 9:50:03</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WANG Jine,DAI Yifan and ZHANG Xuecheng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Jine,DAI Yifan and ZHANG Xuecheng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200205012]]></guid><cfi:id>268</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Reliability Enhancement Testing and Accelerated Life Testing：An Introductory Review]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200204008]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Reliability enhancement testing (RET) and accelerated life testing (ALT) are the focus of attention in reliability testing research at present. The basic concepts about RET and ALT are discussed at first. The state-of-the-art in the research concerned is then briefly reviewed. The possible directions for further research in RET and ALT are summarized in the end.]]></description>
<pubDate>2013/8/21 9:50:19</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[CHEN Xun,TAO Junyong and ZHANG Chunhua]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Xun,TAO Junyong and ZHANG Chunhua</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200204008]]></guid><cfi:id>267</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Information Fusion Model of Integrated Navigation System Based on Neurons]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200203019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[An information fusion model of integrated navigation system based on neurons is proposed, and also an on-line adaptive training algorithm of the weights of neuron is given. Moreover the fusion model of the SINS/GPS integrated navigation system for vehicle is implemented. The theoretical analysis and laboratory experimental results show that this model and adaptive training algorithm are effective and practical.]]></description>
<pubDate>2013/8/21 9:50:36</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[TAO Junyong,WEN Xisen and TAO Limin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>TAO Junyong,WEN Xisen and TAO Limin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200203019]]></guid><cfi:id>266</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Diagnosis and Depression of the Interference Source in the Roller Mechanism of the Six-Degree of Freedom Rig]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200203020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to find out the cause of position deviation of the roller mechanism, the interference source is determined by comparing the feedback signals and making position test at different situations. Based on analysis of the reason that the feedback signals are interfered, several measures are adopted and their effects are given. In the end, the problem is solved by using an isolation transformer for Y-axis driver. It is shown that this solution has good effects in wind tunnel test.]]></description>
<pubDate>2013/8/21 9:50:36</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[MA Dongping and DAI YiFan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>MA Dongping and DAI YiFan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200203020]]></guid><cfi:id>265</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Robust Method to Reconstruct 3-dimentional CAD Model from 2-dimentional Photos]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200202018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper makes an investigation on the algorithm of reconstructing a 3-dimentional CAD model from 2-dimentional photos. By a set of points picked on an object's 2-dimentional photos taken in different direction and position, the movement parameters of the camera and the 3-dimentional geometric information and CAD model of the object can be calculated with the algorithm. The algorithm makes sufficient considerations on the constraints of manufacturablity in CAD modelling, is accurate and robust, and will be useful in the fields of reverse engineering, computer vision and robots.]]></description>
<pubDate>2013/8/21 9:50:52</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WANG Xingbo<sup>1</sup>,DENG Hua<sup>1</sup> and ZHONG Zhihua<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Xingbo<sup>1</sup>,DENG Hua<sup>1</sup> and ZHONG Zhihua<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200202018]]></guid><cfi:id>264</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis for Constant-stress Accelerated Life Testing Dataunder Weibull Life Distribution]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200202019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The 2-step analysis method is the most widely used one in the statistical analysis for constant-stress accelerated life testing under Weibull distribution. Aiming at the deficiency of the 2-step analysis method, this paper develops a new analysis method based on constructed data. The method takes the relativity between Weibull distribution parameters into account, and introduces the 2nd. estimation for characteristic life of Weibull distribution. The method exceeds the 2-step analysis on model fitting optimization, and it improves the precision of estimation for accelerated life testing in turn. Moreover, the method is more convenient for software realization and engineering application.]]></description>
<pubDate>2013/8/21 0:00:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHANG Chunhua,CHEN Xun and LI Yue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Chunhua,CHEN Xun and LI Yue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200202019]]></guid><cfi:id>263</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Decoupling Motion of Mechanism]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200202020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Decoupled mechanisms are easy to control and apt to reach high accuracy. With the development of mechanism, especially the emergence of parallel mechanism, many ones don’t hold this merit. Especially, this merit is not an intrinsic property of parallel mechanisms. It's necessary to study their simple motions  and name these motions  decoupling motions. This kind of movement links very closely to motion control and pathway planning. By the use of screw theory, the definition, classification of decoupling motion, together with the necessary condition and several sufficient conditions for mechanism to realize this kind of motion are given. Finally a mechanism design example of a 2-DOF rotating mechanism is given as an example. It incarnates our research work on mechanism design and mechanism analysis.]]></description>
<pubDate>2013/8/21 9:50:53</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WANG Xianping,DAI Yifan and LI Shengyi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Xianping,DAI Yifan and LI Shengyi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200202020]]></guid><cfi:id>262</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of Singularity and Redundantly Controlof Parallel Manipulators]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200202021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper analyses the various singular configurations of parallel manipulators using differential geometry. In order to perform an effect control of parallel manipulators at singularity, an over-control method is discussed. Finally this paper tests the over-actuated PD strategy on the two degree-of-freedom planar parallel robot and simulations verify the method proposed.]]></description>
<pubDate>2013/8/21 9:50:53</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[SHEN Hui<sup>1</sup>,WU Xuezhong<sup>1</sup>,LI Shengyi<sup>1</sup> and LI Zexiang<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SHEN Hui<sup>1</sup>,WU Xuezhong<sup>1</sup>,LI Shengyi<sup>1</sup> and LI Zexiang<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200202021]]></guid><cfi:id>261</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[QFT Controller Design for Ultra-precision Machine Feeding Mechanism]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200201019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Some uncertainty and nonlinear factors of feeding mechanism have a powerful negative effect on tracking accuracy of ultra-precision machine.The quantitative feedback theory is a controller design method in frequency domain.It is aimed at designing a low order robust controller under plant uncertainty and disturbance.A robust QFT tracking controller with velocity feed forward & integral control is designed in the paper.The simulation result shows that 0.01μm tracking accuracy is achieved with the controller.]]></description>
<pubDate>2013/8/21 0:00:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHENG Ziwen and LI Shengyi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHENG Ziwen and LI Shengyi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200201019]]></guid><cfi:id>260</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Neural Network Method of Accuracy Model Building for Precision Machine Tools]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200201021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The neural network is applied for the error model building of NC machine tool. Taking a precision aerostatic granite milling machine as the research object, an accuracy model of the milling machine is established, a special gauge is designed, and a training sample is constructed as well. Positioning accuracy of the machine tool can be forecasted by the neural network accuracy model. The results show that the scheme is feasible.]]></description>
<pubDate>2013/8/21 0:00:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WANG Jianping,DAI Yifan and HONG Xiaoli]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Jianping,DAI Yifan and HONG Xiaoli</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200201021]]></guid><cfi:id>259</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Grey Reliability Design Model and its Application to Mechanical Engineering]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200201022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Grey system is extended to probability stat. theory. Grey probability axiom system is expounded. grey probability density function and Grey reliability calculating method are studied. Then, stress-strength interference grey reliability calculating model and its whitening solution method are established. The program is worked out with Matlab5.3.1 language. Some examples are given, balance analysis is made for the  general reliability design method and it displays that this model is accurate & feasible,and can be used to implement sensitive analysis and robust reliability design when their parameters are changed to effectively control design parameters.]]></description>
<pubDate>2013/8/21 9:51:07</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LUO Youxin,GUO Huixin,ZHANG longting,CAI Anhui and Gui Naipan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LUO Youxin,GUO Huixin,ZHANG longting,CAI Anhui and Gui Naipan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200201022]]></guid><cfi:id>258</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Real Time Identification for Objective Images Using Matlab Toolbox]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200201023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper presents a real time image processing system, with a stereo color image instrument being chained to Matlab platform, for automatically identifying automobiles ahead and then calculating the distance between the instrument and the object. A fuzzy rule based on a color model (hue-saturation-value) is proposed to extract the color characteristic of the taillights, motivated by the fact that all the automobiles have a pair of red color taillights and the HSV model conforms to the color consistency of human vision system. In order to accommodate varying background colors and illumination conditions, the rear window or the shadow of a automobile is further identified by using the value information in the HSV model. Moreover, a new algorithm is presented here for quick filtering out the noise consisted of the granulated or slim pixels. Finally, experimental results are reported and analyzed.]]></description>
<pubDate>2013/8/21 9:51:08</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[PAN Zhongming]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>PAN Zhongming</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200201023]]></guid><cfi:id>257</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of the Tri-Fiber Optic Sensors with Intensity Compensation]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200201024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In the field of reflective fiber-optic displacement sensor, in order to improve the displacement measuring accuracy, two receiving fibers are often used for intensity and reflectivity compensation. Based on the mathematic model of light coupling between the fiber pair, three types of tri-fiber optic sensors are studied. The general mathematic model of the tri-fiber sensors is proposed. Simulation about them is finished. Research shows that these kinds of tri-fiber sensors can not only improve the linear range, linearity and displacement measuring sensitivity, but also eliminate the influence caused by power fluctuation of the light source and variety of surface reflectivity.]]></description>
<pubDate>2013/8/21 9:51:08</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[YANG Huayong,LU Haibao,XU Tao and WANG Jun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YANG Huayong,LU Haibao,XU Tao and WANG Jun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200201024]]></guid><cfi:id>256</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Numerical Simulation of Stochastic Resonance in Bistable System for Detecting Weak Signal]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200306021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper deals with the numerical simulation of stochastic resonance (SR) for detection weak signal. SR is a nonlinear phenomenon generally occurring in dynamical bistable systems excited by noisy periodic signals. Through SR, weak signals immerged in heavy noise can be amplified and optimized by assistance of noise, due to the interplay between noise sources and nonlinearity of the system. We present the numerical method to solve the bistable SR model based on Runge-Kutta algorithm, and propose a new kind of approach for detecting weak signal, which can effectively detect both period and aperiodic weak signals corrupted by the strong noise background.]]></description>
<pubDate>2013/6/14 9:08:50</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[YANG Dingxin and HU Niaoqing]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YANG Dingxin and HU Niaoqing</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200306021]]></guid><cfi:id>255</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Wind Tunnel Test and Numerical Simulation of LongitudinalAerodynamic Force of the  Traction Car]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200306023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The wind tunnel tests (in the case of suction plate and normal plate) and numerical  simulations of longitudinal aerodynamic force of the 200km/h EMU's traction car are performed, and the longitudinal aerodynamic force coefficients are obtained respectively when the traction car is the  front and rear one. The results show that, in the case of suction plate, the aerodynamic drag of the front car and the rear car increase evidently, and the negative lift of the front car increases while the positive lift of the rear decreased; the aerodynamic drag of the sub-floor contributes to the total drag by 25.9 percent. So to decrease drag the emphasis is the sub-floor.]]></description>
<pubDate>2013/6/14 9:08:50</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LIANG XiFeng<sup>1</sup>,TIAN Hongqi<sup>1</sup> and ZOU JianJun<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIANG XiFeng<sup>1</sup>,TIAN Hongqi<sup>1</sup> and ZOU JianJun<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200306023]]></guid><cfi:id>254</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Fractal Characteristic and Simulation Arithmetic ofOptical Surface]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200304016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[According to the self-similar nature of the optical surface in microstructure, its structure feature is described with fractal model independent of the scale. Fractal dimension of the polished surface is calculated by structure function. The influences of roughness RMS, error wavelength, measure scale, sampling length and the number of sampling points on fractal dimension are analyzed. On this basis, a new method which applies the first-order autoregressive fractal model to simulating the optical surface is presented. The influences of the definition scale and model parameter on fractal feature and fractal dimension are analyzed. The research indicates that the evaluation method is simple and independent of the scale in certain range when the microstructure of the optical surface is described by fractal dimension.]]></description>
<pubDate>2013/6/14 9:08:26</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WANG Guilin,LI Shengyi and DAI Yifan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Guilin,LI Shengyi and DAI Yifan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200304016]]></guid><cfi:id>253</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Simulated Calculation on Electromagnetic Fields of theHigh Speed Magnetic Levitation Vehicle]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200304017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The levitating and propulsive electromagnetic fields of the high speed magnetic levitation vehicle is studied by using the finite element method. The tide of the thrust and levitation force varying along under the running condition is highlighted and an experiential formula is derived. According to the analysis and the calculation, the thrust and levitation force are related to the power angle, and the sixfold frequency undulation is found in thrust and levitation force due to the influence of the discontinuousness of the stator grooves and the material.]]></description>
<pubDate>2013/6/14 9:08:26</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[CHEN Dixiang,PAN Mengchun,LUO Feilu,TIAN Wugang and HU Yuanyuan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Dixiang,PAN Mengchun,LUO Feilu,TIAN Wugang and HU Yuanyuan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200304017]]></guid><cfi:id>252</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Extraction of the Characteristic of Mechanism VibrationTransient Signal Based on Entropy of Symbolic Tree]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200304018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The question how to translate a time series into a symbolic series is briefly answered by the simplest binary partition. The frame of symbolic tree and calculation method of Shannon entropy are presented depending on the binary partition. The coding method and histogram function of symbolic series are described. The calculation flow chart for symbolic time series analysis is refered to. The signal characteristics, which are from the vibration of both IC engine block and mechanical bearing, are extracted by the measurement of entropy of the symbolic tree.]]></description>
<pubDate>2013/6/14 9:08:26</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHANG Yu<sup>1</sup> and HU Niaoqing<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Yu<sup>1</sup> and HU Niaoqing<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200304018]]></guid><cfi:id>251</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Means of Improving the Precision of Measuring the Circuitof the Inductance Sensor]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200303023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The principle of the differential amplitude-modulated inductance sensor is introduced and the factors affecting the precision of the secondary measuring circuit is analyzed. Then some techniques are combined to improve the measuring precision, such as the self-fixed amplitude technique, waveform-mending technique, full digital phase sensitivity detection technique, as well as digital filter and linearity compensation technique in the software. The experiments show that the measuring precision has been greatly enhanced using these techniques.]]></description>
<pubDate>2013/6/14 9:08:14</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[HONG Xiaoli and DAI Yifan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HONG Xiaoli and DAI Yifan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200303023]]></guid><cfi:id>250</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A New Method of Measuring Linearity of Deep Hole]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200302024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A new method of measuring linearity of deep hole is put forward. Accordingly, the physical and mathematical model is established. Then the system error of measuring model function is analyzed. It is proved effective in practical application with the experiment of three-coordinated instrument.]]></description>
<pubDate>2013/6/14 0:00:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[XU Hang<sup>1</sup>,JIAO Bing<sup>2</sup> and YANG Guangyu<sup>3</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Hang<sup>1</sup>,JIAO Bing<sup>2</sup> and YANG Guangyu<sup>3</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200302024]]></guid><cfi:id>249</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Simulation of the Surface Topography in Diamond Turningunder the Effect of Vibration]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200301017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In ultra-precision machining,the major factors influencing the surface topography of workpieces include many parameters of cutting process such as the tool geometry,feed rate,the speed of spindle and relative vibration between the tool and the workpiece.A surface topography simulation model of ultra-precision machining is established considering these factors.Trimming phenomenon of the tool edge profile is also analyzed at the radial section of the workpiece by the simulation program.It is experimentally shown that good effect is obtained by using the model to simulate the surface topography of ultra-precision face turning.The model can also be used for simulating the traces of tool motion,predicting the three-dimension microscopic surface topography and two-dimension section profile,and optimizing the cutting parameter for diamond turning process.]]></description>
<pubDate>2013/6/14 9:07:50</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[YIN Ziqiang and LI Shengyi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YIN Ziqiang and LI Shengyi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200301017]]></guid><cfi:id>248</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Developments of Microaccelerometer Research]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200406008]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The basic principle of microaccelerometers is explained and several kinds of them with different structures are investigated, including piezoelectric type, capacitive type, torsional-cantilever type, tunneling type, etc. The characteristics of those types are introduced. Some focused problems are pointed out. Furthermore, several methods and advices are offered to improve the property of microaccelerometers.]]></description>
<pubDate>2013/5/8 10:45:33</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LI Shengyi,LIU Zonglin and WU Xuezhong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Shengyi,LIU Zonglin and WU Xuezhong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200406008]]></guid><cfi:id>247</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Motion Bifurcation at Singularities of Parallel Mechanisms]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200406012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The elementary bifurcation theory is utilized to study the bifurcation of singularities of general parallel mechanisms. Based on constraint equations, some typical motion bifurcation of simple parallel mechanisms are researched and they can be classified into different styles by codimensions of constraint equations at actuator singular points or end-effector singular points. Finally, this paper discusses how the disturbance of mechanism parameters affects the bifurcation diagram of singularities and results show that those nonpersistent bifurcations of parallel mechanisms can be transformed into those persistent bifurcations so that the motion uncertainty at singularities can be overcome.]]></description>
<pubDate>2013/5/8 10:45:34</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[SHEN Hui,WU Xuezhong and LI Zexiang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SHEN Hui,WU Xuezhong and LI Zexiang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200406012]]></guid><cfi:id>246</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis and Control of Inflection Points on NURBSCurves via Control-polygon]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200405017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper first makes a study of the shape variation laws of generic planar parametric curves by means of geometry deformation, obtains a necessary and sufficient condition for a curve's occurring inflection points and a functional equation to determine the inflection points on the deforming curves. Then based on the results, the paper puts forward a method to study the inflection points on NURBS of non-convex control polygon, particularly makes an investigation on the distribution of inflection points on the curve whose control polygon is regular and with one to two inflection points, and gains several conditions and criterions for analysis and manipulation of the respected NURBS curves. The results are useful for the algorithm-design and shape-control in CAD modeling.]]></description>
<pubDate>2013/5/3 9:19:53</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WANG Xingbo<sup>1</sup>,SHI Jinlong<sup>1</sup> and LU Shirong<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Xingbo<sup>1</sup>,SHI Jinlong<sup>1</sup> and LU Shirong<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200405017]]></guid><cfi:id>245</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Study of Module Solution for Product Configuration]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200405018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[For the phase of product configuration in modular design, a process of product module configuration set is put forward based on the feature parameter model of module family. A detailed description is offered on how to generate the mapping relation from user requirements to module feature parameters through Quality Function Deployment (QFD) method. According to this relationship, a model of similarity metrics is adopted to retrieve modules from module base. Hence, a complete approach for constructing product module configuration set and product configuration scheme is offered.]]></description>
<pubDate>2013/5/3 9:19:53</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LI Guoxi,CI Yuanzhuo,GONG Jingzhong,WU Baozhong,YANG Shining and ZHANG Baohui]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Guoxi,CI Yuanzhuo,GONG Jingzhong,WU Baozhong,YANG Shining and ZHANG Baohui</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200405018]]></guid><cfi:id>244</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on the Strategy of Geometry Level Conflict DetectionBased on the Concurrent Timing Sequence]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200405019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[With the background of collaborative 3D-CAD design, the paper probes into the detection of the conflict in the real-time collaborative design, and presents an idea that data confliction in real-time collaborative 3D design is entity feature confliction. According to this idea, the paper discusses the conflict detection methods based on feature. By analyzing the shortcomings  of the methods, the paper provides a geometry level conflict detection strategy with higher feasibility as well as its timing sequence scheme. The conflict detection data structure and conflict detection rules are also studied. This conflict detection idea has been validated in the Pro/ENGINEER platform of PTC Corporation and a better conflict detection result is achieved.]]></description>
<pubDate>2013/5/3 9:19:53</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[SHANG Jianzhong,TANG Li,MENG Fanlei and LUO Zirong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SHANG Jianzhong,TANG Li,MENG Fanlei and LUO Zirong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200405019]]></guid><cfi:id>243</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research Based on Modal Analysis to Dynamical AngularRigidity of the Flexible Joint]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200405020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The flexible joint is the key component of dynamically tuned gyro (DTG), and its rigidity is a very important parameter. A dynamical angular rigidity measuring method is given based on modal analysis. It excites the flexible joint with step excitation, and measures the vibration with laser sensor and acquires the vibration data with the data acquisition card, then has the digital filter, fast fourier transform (FFT) and spectrum zoom, calculates the dynamical angular rigidity of the flexible joint; simultaneously the dampness ratio coefficient is obtained. The method solves the problems which brings about static rigidity test of the flexible joint, and has the characteristics of high precision, convenient operation, high efficiency and good repeatability.]]></description>
<pubDate>2013/5/3 9:19:53</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WU Dongliang,DAI Yifan and ZHEN Ziwen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WU Dongliang,DAI Yifan and ZHEN Ziwen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200405020]]></guid><cfi:id>242</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Meshing Simulation Model for Cylindrical HelicalGear Pair in the Large Power Shipborne Reducer]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200405022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A 3-D nonlinear contact analysis model with several teeth pairs in meshing which is used to simulate a pair of cylindrical helical gear in the large power shipborne reducer is established by the direct constraint method provided by MSC.Marc. Then, based on the model, a quasi-static analysis is carried out in a meshing period. The numerical results show a very good agreement with the meshing rules in reality, and simultaneously, the rationality of the model is verified. Because of the original traits, the model can be used to be deal with the dynamic meshing problem of the gear pair.]]></description>
<pubDate>2013/5/3 9:19:53</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[YUAN Jiehong<sup>1</sup>,MA Kanchu<sup>2</sup> and LI Changyi<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YUAN Jiehong<sup>1</sup>,MA Kanchu<sup>2</sup> and LI Changyi<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200405022]]></guid><cfi:id>241</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Profile Formule Derivation of the Involute Spherical Gears]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200404020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A new spherical gear mechanism is intruduced. Surface formule of the new mechanism is deduced.  This paper first deduces the general formules of involute, and transfoming these formulas by rotation matraix,  the surface formule of the new spherical gear has been found. Based on the theory of double degree freedom, the action formule of the two spherical gears is deduced, and futhermore, the surface formule of the conjugate teeth profiles is deduced as well. The results proves that the conjugate teeth profile of  the ringed involute spherical gear is also the profile of the ringed involute spherical gear.]]></description>
<pubDate>2013/4/27 3:07:23</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[PAN Cunyun and WEN Xisen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>PAN Cunyun and WEN Xisen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200404020]]></guid><cfi:id>240</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Dwell Time Algorithm for MRF of Axis-symmetrical Aspherical Parts]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200403019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A dwell time algorithm for the magnetorheological finishing (MRF) of the small axis-symmetrical aspherical surfaces is described. The dwell time at each dwell grid is calculated as integer multiple of the workpiece rotation period. The removal rate on the surface of workpiece is transferred to a removal matrix. Nonnegative least-squares solution is used to obtain the optimal solution of the dwell time. A piece of axis-symmetrical aspherical surface glass is polished on the MRF experimental facility developed by us. After iterative polishing three times, the residual error of the workpiece decreases from 8μm to 0.5μm.]]></description>
<pubDate>2013/4/27 3:07:06</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[PENG Xiaoqiang,DAI Yifan,Li Shengyi and YOU Weiwei]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>PENG Xiaoqiang,DAI Yifan,Li Shengyi and YOU Weiwei</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200403019]]></guid><cfi:id>239</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Planetary Transmission Type of Spherical Gear and ItsDriving Mechanisms]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200403020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[One of the new kind of planetary tranmission composed of the ring involute  spherical gear and its driving mechanism is introduced, and the conformation of the new planetary tranmission, and kinamatic are also analyzed. The new planetary tranmission is composed of two spherical gears and one bracket. The output axle can swing toward all directions. Synthesizing one of the spatial driving mechanisms which is used to control the orientation of the bracket. The movability of the driving mechanism is analysed. The kinamatic model between the orientation angle of the output axle and the control motor has been found, based on which the orientation angle can be controlled accurately.]]></description>
<pubDate>2013/4/27 3:07:06</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[PAN  Cunyun and WEN Xisen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>PAN  Cunyun and WEN Xisen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200403020]]></guid><cfi:id>238</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Fatigue Enhancement Mechanism of the Super-GaussianRandom Vibration Environment]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200403021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper studies the fatigue enhancement mechanism of the super-Gaussian amplitude distributioncharacteristic. At first it is demonstrated that the responsestressesamplitudedistribution is super-Gaussian in the repetitiveshockmachine. Then it isproved that the super-Gaussianrandom stressed have higher efficiency to stimulate fatigue failure than Gaussian random stresses of the equivalent lever. Finally the fatigue enhancement mechanism of super-Gaussianamplitude distribution characteristic is illustrated.]]></description>
<pubDate>2013/4/27 3:07:06</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[JIANG Pei,ZHANG Chunhua,CHEN Xun and WEN Xisen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>JIANG Pei,ZHANG Chunhua,CHEN Xun and WEN Xisen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200403021]]></guid><cfi:id>237</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on Optimal Sensor Selection Model in Test Design forMechatronics Equipments]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200403022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A MINLP model based on the single fault resolution is proposed. The model takes into account the sensor failure probabilities and fault occurrence probabilities of the equipments, and it is constrained by FDR and FIR to attain optimal sensor selection in test design for mechatronics equipments. The model is applied to a servo platform to highlight the utility of the model.]]></description>
<pubDate>2013/4/27 3:07:06</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[YANG Guofeng,QIU Jing,QIAN Yanling and LIU Guanjun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YANG Guofeng,QIU Jing,QIAN Yanling and LIU Guanjun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200403022]]></guid><cfi:id>236</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A New Type of Driving and Echoes Detection Circuit forUltrasonic Transducers]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200403023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper presents a new type of driving and echoes detection circuit for ultrasonic transducers based on the analysis of their working mechanization. The driving circuit consists of a power amplifier, a pulse transformer and a compensation circuit. The echoes detection part is made up of a preamplifier, a band-pass filter and an ALC circuit. The experiment shows that this circuit can improve ultrasonic ranging distance and has good performances than the original ones.]]></description>
<pubDate>2013/4/27 3:07:06</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[SUI Weiping,PAN Zhongming and WANG Yueke]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SUI Weiping,PAN Zhongming and WANG Yueke</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200403023]]></guid><cfi:id>235</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Study of Sliding Mode Variable Structure Control of theAnti-lock Braking System Based on Optimal Slip Ratio]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200402016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The non-linear and time-varying mathematical model of the anti-lock braking system (ABS) is established, and the application of sliding mode variable structure controller (SMVSC) in ABS is implemented. Two kinds of estimation algorithms of the optimal slip ratio realized by recursive least squares are proposed:  one based on the mathematical model of cohesion coefficient vs. slip ratio curve, the other based on the shape of this curve. The simulation results show the feasibility and validity of SMVSC based on optimal slip ratio.]]></description>
<pubDate>2013/4/22 10:35:43</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LIU Guofu,ZHANG Qi,WANG Yueke and ZHENG Weifeng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Guofu,ZHANG Qi,WANG Yueke and ZHENG Weifeng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200402016]]></guid><cfi:id>234</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Application in Angles Measurement for Directional Drilling withMicromachined Polysilicon Accelerometers]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200402017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at to the special demands for angles measurement while drilling underground, the paper describes a new approach of determining the pitch and the roll with a single-axis accelerometer and a dual-axis accelerometer. A feasible temperature compensation method is adopted in our established systemCorresponding experimental results are described. Results show that the system has the advantages of small size, low cost, and its accuracy is better than 1°C. It is especially suitable for directional drilling to obtain the desired angles.]]></description>
<pubDate>2013/4/22 10:35:43</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[XU Tao,LUO Wusheng,LU Haibao and DONG Wenjuan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Tao,LUO Wusheng,LU Haibao and DONG Wenjuan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200402017]]></guid><cfi:id>233</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Kinematics Analysis of a Three-DOF AttitudeAdjustment Mechanism]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200402019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A three degree-of-freedom attitude adjustment mechanism is proposed. Direct kinematics was studied and the results indicate that the relationship between the angles the supporting system rotates and the attitude (α,β,γ)of the model is nonlinear and coupled. Based on the specific structure of the supporting system, geometric method was adopted to obtain the inverse solution.]]></description>
<pubDate>2013/4/22 10:35:43</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[DONG Peitao,WU Xuezhong and CHENG Zhongyu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>DONG Peitao,WU Xuezhong and CHENG Zhongyu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200402019]]></guid><cfi:id>232</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Studies of Predictive Functional Control Arithmetic inElectromechanical Servo System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200402020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[PFC-PID cascade transparent control strategy is presented with actions of typical electromechanical servo system. The random disturbance is surpassed in inner-loop with PID control, and the internal loop is the generalized control plant of the external PFC loop. The inner model of PID is the first-order plus the dead-time model which is gained by matching generalized control plant. The paper analyses the implementary arithmetic in the servo system with saturation and lag segment, and analyses the performance of the close loop to obtain the condition of stability and robustness. The simulation results show that the new PFC-PID control method is of robustness and the ability to suppress disturbance.]]></description>
<pubDate>2013/4/22 10:35:44</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LIU Gang,LI Shengyi and FAN Dapeng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Gang,LI Shengyi and FAN Dapeng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200402020]]></guid><cfi:id>231</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of the 3-state Markov Model in BIT]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200401020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The BIT technique is an important approach to improve the testability and diagnostic capability of the system. But the high false alarm rate(FAR) is one of the important factors that prevent BIT from wider application. The states of a system are divided into 3 states that include OK state, intermittent state and faulty state. The Markov model is set up, the relation between 3-state model and 2-state model is compared. Theoretical analysis shows that  BIT of 3-state model is better than that of 2-state model in reducing FAR as well as increasing false diagnosis rate(FDR).]]></description>
<pubDate>2013/4/22 10:35:30</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LIU Xinmin,QIU Jing and LIU Guanjun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Xinmin,QIU Jing and LIU Guanjun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200401020]]></guid><cfi:id>230</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Application of the Principal Components Analysis(PCA) to Debris Recognition]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200401021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The basic principle and algorithm of the Principal Components Analysis (PCA) are introduced in detail. The debris recognition approach based on the PCA is presented, and the process of using this approach to deal with the debris recognition is described. The validity of the approach is proved and the satisfying effects on improving the veracity of recogniting and decreasing the workload of calculation are also demonstrated by the experiment of classifying a group of typical examples.]]></description>
<pubDate>2013/4/22 10:35:30</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LI Yue and Lü Kehong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Yue and Lü Kehong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200401021]]></guid><cfi:id>229</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of the Failure Modes and Effects of the Feedback SystemsUsing Functional Role Models Theory]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200401023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on the related knowledge of the functional disassemble in the engneering design. The feedback signal is thought to be classed as positive, zero, negative signal at the port of input by analyszing the working principles and its functional role model construction of feedback system. Then, the technology of the fault transmit analysis about feedback is put forth. The process of the fault analysis is illustrated by the fuel-metering system of the jet plane engine. The research results show this method can resolve a type of  fault analysis of the feedback system effectively, and the range of applications of the functional role model is extended along with it.]]></description>
<pubDate>2013/4/22 10:35:30</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHANG Hai,QIAN Yanling and QIU Jing]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Hai,QIAN Yanling and QIU Jing</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200401023]]></guid><cfi:id>228</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Frequency-band-energy-ration-based SOM Algorithmfor Turbopump Fault Detection]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200506020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to detect the turbopump fault short of fault samples, the spectrums of turbopump vibration signals were analyzed, and the frequency band energy ratio was selected as the fault feature of those signals. After SOM competitive learning theory and U matrix description of clustering results were discussed, the frequency-band-energy-ratio-based SOM algorithm for turbopump fault detection is presented, and the selection of the best matching unit (BMU) and the adaptive upgrade of their weight vectors are also realized in this algorithm.  With a liquid rocket engine (LRE) historical test data, this algorithm is validated. These results show that there is only one class when the algorithm is used to healthy turbopump vibration data, and the distance between the neighboring neuron is less than 0.1; while there are two or more classes when the algorithm is used for faulty turbopump vibration data, and the distance between the neighboring neuron is greater than 0.1. Therefore the algorithm can effectively detect the  turbopump fault.]]></description>
<pubDate>2013/4/10 9:23:45</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[HU Niaoqing,QIU Zhong,XIE Guangjun and HU Lei]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HU Niaoqing,QIU Zhong,XIE Guangjun and HU Lei</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200506020]]></guid><cfi:id>227</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Decreasing False Alarm of the Built-in TestBased on Optimal Unknown Input Observer]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200506021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The false alarm of the BIT based on model in the mechatronics control system is studied. Firstly, the information uncertainty of the BIT system and the reason of BIT false alarm are analyzed. Then, the BIT system is designed by the application of the optimal UIO(unknown input observer). It is robust to the information uncertainty, and can decrease the false alarm. Finally, the experimentation on the BIT system of stabilization and automatic pointing and tracking platform is made. The result shows that the analysis is correct and the method is effective.]]></description>
<pubDate>2013/4/10 9:23:45</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[JIANG Yunchun,QIU Jing,LIU Guanjun and QIAN Yanling]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>JIANG Yunchun,QIU Jing,LIU Guanjun and QIAN Yanling</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200506021]]></guid><cfi:id>226</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Methods to Confirm the Dimension ofRe-constructed Phase Space]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200506022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[It is necessary to get the dimension of re-constructed phase space before calculating the chaotic statistical. characteristics. Six methods are offered which are the measurement of the on unaltered maximal characteristic value, the measurement of changeless geometry mete, the measurement of false nearest neighbors, the measurement of minimum prediction error, the measurement of minimal Shannon entropy, and the measurement of the experience evaluation. An engineering case is given to explain the application of the measurements of the unaltered maximal characteristic value and minimal Shannon entropy.]]></description>
<pubDate>2013/4/10 9:23:45</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHANG Yu<sup>1,2</sup> and REN Chenglong<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Yu<sup>1,2</sup> and REN Chenglong<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200506022]]></guid><cfi:id>225</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Risk Management Decision Model of the Model Project Durationand Adaptive Genetic Algorithm]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200506023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[According to the characteristics of the process of the model project, the risk management decision model of the model project is presented. Some essential risk  factors of the project duration such as activity overlapping, activity iterations, uncertain activity durations and non-consumable resource amount are integrated into the decision model. Considering the characteristics of the model, a simulation optimization method based on adaptive genetic algorithm is proposed. A case study shows that the algorithm is beneficial.]]></description>
<pubDate>2013/4/10 9:23:45</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[GAO Feng and CHEN Yingwu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GAO Feng and CHEN Yingwu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200506023]]></guid><cfi:id>224</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Automatic Measuring System forProjectile Dimension Measurement]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200506026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The measurement principles are discussed in detail for projectile dimension measurement, based on the analysis and classification of the structural dimensions of special projectiles. According to the practice in the factory, a measuring equipment is set up to measure those dimensions. Two high precision laser displacement sensors and motion controller are introduced to construct this automatic digital measurement system for digital inspection and evaluation of the key dimensions. Actual application shows that this system can effectively improve the projectile dimension measurement precision and give the error distribution. Testing result shows that the system measurement error is less than 10 microns for internal/external diameters and 100 microns for the external length. Hence the measurement system can guide the machining processes and helps to control the product quality.]]></description>
<pubDate>2013/4/10 9:23:45</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[XIE Xuhui and LUO Zhichao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XIE Xuhui and LUO Zhichao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200506026]]></guid><cfi:id>223</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Modeling and Simulation of the Movement Curved Surfaceof the Long Flexible Fin of Gymnarchus Niloticus]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200505013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper establishes a uniform kinematics model to describe the undulation surfaces by the long flexible fin of Gymnarchus niloticus, with various factors comprehensively considered. Simulation is carried out using the morphological measured data and some simplified hypotheses to related factors. Compared with the filmed views, the simulation results show that the kinematics model can effectively depict the movement curved faces of the long flexible fin, and has better adaptability as well as versatility. Meaningfully, the establishment of the kinematics model for the long flexible fin has made a good preparation for further finite-element-based dynamic analysis.]]></description>
<pubDate>2013/4/8 11:10:34</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[XIE Haibin,SHEN Lincheng and HU Tianjiang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XIE Haibin,SHEN Lincheng and HU Tianjiang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200505013]]></guid><cfi:id>222</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Contour-detecting Algorithm for Undulation by the Long-basedDorsal Fin of Gymnarchus Niloticus]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200505014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Gymnarchus niloticus, propelled by undulations of a long-based dorsal fin, is a typical representative of median and/or paired fin (MPF) fishes. Elongated-body theory (EBT) is one of the most effective theoretical models which can be applied to analyze the swimming performance of MPF fishes. This paper proposes an algorithm to detect the contour curve of undulations by the long-based dorsal fin, and furthermore the contour function is indeed a key factor in EBT. In this study, some videos are recorded when the specimen (which we name MPC-I) is freely swimming. We preprocess each frame of several selected video segments with a series of operations including rotation-calibrating, origin-matching, scale-regularizing as well as noise-reducing. Finally, the contour curve is fitted with a polynomial expression which is determined by a cluster of preprocessed undulation curve samples. The experimental results show that this algorithm is effective, and moreover the detected contour function is a good preparation for further analyses on the dorsal fin propulsion thrust and efficiency.]]></description>
<pubDate>2013/4/8 11:10:33</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[HU Tianjiang,LI Fei and SHEN Lincheng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HU Tianjiang,LI Fei and SHEN Lincheng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200505014]]></guid><cfi:id>221</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Effects of Geometric Intrinsic Quantities upon the MechanicalProperties on the Surfaces of Deep Drawing Dies]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200504025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The mechanical properties on the active surfaces of the molds or dies will be directly influenced by non-uniform distribution of the geometric intrinsic quantities such as curvature, metric invariant, and convexity-concavity of the surfaces. This paper shows an investigation made on the relationship between such geometric intrinsic quantities and the mechanical quantities. The results demonstrate that discontinuity of Gaussian curvature will lead to discontinuity of deformation and frictional dissipative energy. The frictional dissipative energy will increase with the decrease of the normal curvature on the deep-drawing path. The heat flux will increase with the increase of inflection points on the surface. These provide novel references for optimal design of the molds and dies.]]></description>
<pubDate>2013/4/8 11:10:22</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WANG Xingbo and SHI Jinlong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Xingbo and SHI Jinlong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200504025]]></guid><cfi:id>220</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Health Monitoring System of Turbopump for LiquidRocket Engine]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200503009]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to enhance the safety of liquid rocket engine (LRE) turbopump and minimize the damage of its faults, a health monitoring system of turbopump (TP-HMS) is designed for a large LRE. After the realization  of the subsystems for signal acquisition, real-time fault detection, post test data analysis and real-time database support, the function and the flow of execution are investigated and analyzed. Then, the multi-feature adaptive threshold  compositive decision-making algorithm (MATA) is validated with the historical data from LRE test as well as real-time data from rotor test platform. To obtain the information of fault signals, the adaptive spectrogram  is applied in the data analysis. It is shown that MATA can detect the faults in real time and give no false alarm in this case. Through the application of adaptive spectrogram, the cross-term interference is suppressed. The time frequency information is obtained accurately. Therefore, the conclusion is drawn that the TP-HMS design is suitable for the health monitoring of LRE turbopump.]]></description>
<pubDate>2013/4/8 11:09:48</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[XIE Guangjun,HU Haifeng,QIN Guojun,HU Niaoqing and WEN  Xisen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XIE Guangjun,HU Haifeng,QIN Guojun,HU Niaoqing and WEN  Xisen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200503009]]></guid><cfi:id>219</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Joint Optimization of the Fault Feature and Classifier]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200502020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Feature selection and parameters optimization of the fault classifier can enhance the fault diagnosis accuracy. Using the interdependent relationship between the feature selection and classifier parameter, a method of joint optimization of feature selection and classifier parameters is proposed to improve the diagnosis accuracy. By using the method we adopt the support vector machine (SVM) as a fault classifier, take into account of the radius-margin bounds for the accuracy evaluation of SVM classifier, and applies genetic algorithm (GA) to solve the joint optimization problem. In the gear fault diagnosis experiment, the joint optimization method guarantees better diagnosis accuracy and the optimization process has a higher rate than the single optimization of features or SVM parameters. So the joint optimization of fault features and classifier can fast achieve the better diagnosis accuracy in fault diagnosis.]]></description>
<pubDate>2013/3/25 4:57:52</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WANG Xinfeng,QIU Jing and LIU Guanjun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Xinfeng,QIU Jing and LIU Guanjun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200502020]]></guid><cfi:id>218</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Failure Modes and Effects Analysis of the Space-borneRubidium Clock]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200502022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The space-borne rubidium atomic frequency standards(RAFS) play a critical role in many space systems. Their performance and reliability will greatly influence the functions of these systems. The failure mode and effects analysis (FMEA) is applied in the space-borne RAFS to identify and rectify the failures during its development and design stages. The basic principle of the space-borne RAFS and its framework diagram are introduced. A certain space-borne RAFS is divided into six subsystems and its reliability block diagram is depicted. Each subsystem is analyzed by FMEA and a part of the FMEA table of physics package subsystem is presented as an example.]]></description>
<pubDate>2013/3/25 0:00:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[DENG Aimin,CHEN Xun,ZHANG Chunhua and DONG Li]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>DENG Aimin,CHEN Xun,ZHANG Chunhua and DONG Li</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200502022]]></guid><cfi:id>217</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Optimum Algorithm for the Sensor Placement on the StructureMonitoring System of Cable-Stayed Bridge]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200502023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The sensor system, especially the sensor placement, plays an importance part in the research of the health monitoring system of large-span cable-stayed bridge. The various optimum algorithms for the sensor placement at present are classified and discussed. Genetic algorithm is introduced and applied to determining the optimal position of the sensors of the monitoring system of the single-tower cable-stayed bridge of the Zhaobaoshan in Ningbo. Numerical simulation results indicates that this algorithm has a good convergence and ability to get the stable and reliable solution.]]></description>
<pubDate>2013/3/25 4:57:56</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHENG Rongyue<sup>1,2</sup>,XU Kaiming<sup>1</sup>,TANG Guojin<sup>2</sup> and HUANG Jianyuan<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHENG Rongyue<sup>1,2</sup>,XU Kaiming<sup>1</sup>,TANG Guojin<sup>2</sup> and HUANG Jianyuan<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200502023]]></guid><cfi:id>216</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Fatigue Enhancement Mechanism of the Broadband RandomVibration Environment]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200501007]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Fatigue enhancement mechanism of the omni-axis random vibration environment is one of the key techniques to carry out the reliablity enhancement testing. This paper studies the fatigue enhancement mechanism of  its broad bandwidth characteristic. At first related spectral parameters of random stresses to influence fatigue are studied. Then it is analyzed how the bandwidth affects the above parameters. Finally the fatigue enhancement mechanism of  the broad bandwidth characteristic is illustrated.]]></description>
<pubDate>2013/3/25 4:48:25</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[JIANG Pei,ZHANG Chunhua,CHEN Xun and WEN Xisen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>JIANG Pei,ZHANG Chunhua,CHEN Xun and WEN Xisen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200501007]]></guid><cfi:id>215</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Micro-mechanic-hydrodynamic Model for Yield Stress ofMagnetorheological Fluids]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200604023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A new micro-mechanic-hydrodynamic model(MMH-Model) to predict the yield stress of magnetorheological fluids has been developed . The storage modulus of a MR fluid with a three-dimensional chain structure model and the apparent viscosity of a MR fluid using the balance between the magnetic torque and hydrodynamic torque are determined. The magnetic interaction between the particles and the wall, as well as the static coefficient of friction, are considered. The predictions of the model are compared to preliminary experimental data obtained in a controlled stress plate-plate rheometer and other theoretical predictions. It is found that the model gives almost the correct yield stress for the MRFs in the magnetic fields lower than the saturation field, but underestimates the experimental results obtained in the magnetic fields higher than the saturation field.]]></description>
<pubDate>2013/3/25 4:46:17</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[PEN Xiaoqiang,YOU Weiwei and SHI Feng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>PEN Xiaoqiang,YOU Weiwei and SHI Feng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200604023]]></guid><cfi:id>214</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Aerodynamic Performance Comparison of Several Kind ofNose Shapes of Maglev Train]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200603020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Due to the short streamline nose, the aerodynamic performance of Shanghai maglev train is not very good. In this paper, several streamline shapes were designed for domestic maglev train according to the given section and requirements supplied by domestic rolling stock works. By using the three-dimensional compressible N-S equations and  turbulence model, aerodynamic performances of all schemes were analyzed, and then the streamline shapes were optimized based on the calculation results. In so doing, the best streamline shape with good aerodynamic performance and good appearance were obtained. Because of the narrowest horizontal contour line and the smallest curvature of vertical contour line, the aerodynamic drag force and train passing pressure pulse of the third scheme are the least among the final three selected schemes, so it is the best. The results show that this streamline shape designed for domestic maglev train is better than Shanghai maglev train (TR08) in aerodynamic performance, and the aerodynamic drag force of domestic maglev train is 33.84KN at the speed of 4300 km/h, while TR08 is 54.07KN; at the same time, the train passing pressure pulse of domestic maglev train is 2913Pa, while TR08 is 3827Pa.]]></description>
<pubDate>2013/3/14 10:38:47</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LIU Tanghong<sup>1,2</sup>,TIAN Hongqi<sup>1</sup> and WANG Chengyao<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Tanghong<sup>1,2</sup>,TIAN Hongqi<sup>1</sup> and WANG Chengyao<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200603020]]></guid><cfi:id>213</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[An Efficient Numerical Method to Compute and AnalyzeCAD Surface Model]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200603022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper presents a numerical method to compute CAD surface models. The method first divided a CAD model into a sequence of subfields, each of which is a simple surface-patch of the CAD model. Then, by setting up the governing equations for the patch-element, it computed the total field by assembling governing equations of all subfields into the global equations of the total field according to the manifold structure of the CAD model. The element's governing equations can be formed by coupling finite element (FE) with boundary element (BE), and FE with element free (EF) or else according to the objective of the computed problems. The paper systematically demonstrates the key procedures of selecting elements and setting up governing equations via a solution process of linear elastic problems. A numerical example with comparison to ANSYS computation is shown in the analysis of deformation on a blending surface of three-rounded corner. Finally the static loads are presented before the paper comes to an end.]]></description>
<pubDate>2013/3/14 10:38:49</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WANG Xingbo<sup>1,2</sup>,SHI Jinlong<sup>1</sup> and CHEN Xixiang<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Xingbo<sup>1,2</sup>,SHI Jinlong<sup>1</sup> and CHEN Xixiang<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200603022]]></guid><cfi:id>212</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on Turbopump Fault Detection Based on RotorIntrinsic Frequency]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200603023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To detect faults of a liquid rocket engine (LRE) turbopump effectively, a turbopump fault detection approach based on rotor intrinsic frequency is presented in this paper. First of all, 28 LRE historical test data were analyzed, from which the values of the first, second and third order critical frequency and the axial intrinsic frequency were achieved. After that, the stability and turbopump fault sensitivity of this four rotor intrinsic frequencies were researched, from which we found that their intrinsic frequency amplitudes had high stability and fault sensitivity. Finally, the turbopump fault detection approach was validated by LRE historical test data. The results show that the turbopump faults can be detected effectively by using the amplitudes of rotor first, second and third order critical frequency as well as axial intrinsic frequency.]]></description>
<pubDate>2013/3/14 10:38:49</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[XIE Guangjun,HU Niaoqing,Qin Guojun,HU Haifeng and HU Lei]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XIE Guangjun,HU Niaoqing,Qin Guojun,HU Haifeng and HU Lei</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200603023]]></guid><cfi:id>211</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Conceptual Rover with Active Self-adaptive Suspension and Its Configuration Model & Means]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200602021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The space rover shoulder is expected to have higher mobility and reliability to satisfy future space exploration mission in unknown irregular environment. Through the combination of the advantages of both the self-adaptive and active rovers, the concept of active self-adaptive suspension rover, a type of self-adaptive suspension rovers, which can reconfigure themselves according to terrain, is creatively ggproposed. In even terrain, the active self-adaptive suspension rover just works like self-adaptive suspension rovers, while in rough terrain, it can reconfigure its structure to fit terrain and promote mobility. To verify the idea, a six wheeled active self-adaptive suspension based concept rover, which can fold and stand up if it is upset, was constructed. Based on an integrated model of mobility for space rover, the configuration model and the active way to reconfigure were also proposed. It is revealed from the study that the active configuration makes the active self-adaptive suspension rover own better mobility and reliability, which enable the active self-adaptive suspension rover to fit unknown irregular environment better.]]></description>
<pubDate>2013/3/14 10:38:34</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[SHANG Jianzhong<sup>1,2</sup>,ZHANG Xinfang<sup>1</sup>,LUO Zirong<sup>2</sup> and SONG  Chunxia<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SHANG Jianzhong<sup>1,2</sup>,ZHANG Xinfang<sup>1</sup>,LUO Zirong<sup>2</sup> and SONG  Chunxia<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200602021]]></guid><cfi:id>210</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Effection of the Material of a Small Tool to the RemovalFunction in Computer Control Optical Polishing]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200602022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The effect of the three kinds of material on the removal function is studied. The considering properties of the removal function include the removal profile, the removal rate, the stability of the removal function and the surface topography. A series of experiments have been done to the perfect properties of the removal function. The experiments were done on the AOCMT machine tool and the contact measurement system developed by ourselves. The results were presented as follows. Polyurethane is used in the step of the rough polish. Polishing cloth is used in the step of the finishing polish. Polishing pitch (55# polishing pitch by GuGolz Corporation ) is used in the step of the surface treatment or the finishing polish.]]></description>
<pubDate>2013/3/14 10:38:34</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[DAI Yifan,SHANG WenJin and ZHOU Xusheng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>DAI Yifan,SHANG WenJin and ZHOU Xusheng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200602022]]></guid><cfi:id>209</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[MDAC Narrowband Tracking Filter for Dynamic BalancingMeasurement]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200602023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to extract the vibration value which indicates the same frequency as rotating speed from the lower S/N ratio signal and adapts to speed variety, the method of Narrowband Tracking Filtering was deduced by the principle of correlation analysis. Based on this method a Narrowband Tracking Filter was designed and implemented by Multiplying Digital-to-Analog Converter (MDAC). The experimental results demonstrate that the filter has the good performance and is able to meet the requirements of dynamic balancing measurement, which the relative error of amplification is better than 0.2%, the absolute error of phase is better than 0.4° and its output can track the change of rotating speed when the variety ratio of speed is under 9000r/min<sup>2</sup>.]]></description>
<pubDate>2013/3/14 10:38:34</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[TAO Limin,XIAO Dingbang and WEN Xisen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>TAO Limin,XIAO Dingbang and WEN Xisen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200602023]]></guid><cfi:id>208</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Examination and Analysis of Undulatory Dorsal FinPropulsion of Gymnarchus Niloticus]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200601022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper introduces the experimental principle and method on undulatory dorsal fin propulsion of gymnarchus niloticus, a large aggressive fish whose swimming mode is referred to as amiiform mode. The fish is propelled by undulations of a long-based dorsal fin while the body axis is in many cases held straight in swimming. In order to investigate the undulatory dorsal fin propulsion and its potential for providing alternative approaches for future underwater vehicle design, the kinematics of steady forward swimming of gymnarchus niloticus was described and the geometric features of the body and locomotive characteristic and parameters of the flexible dorsal fin were discussed. Furthermore, a simplified kinematic model on locomotion of the undulatory long dorsal fin propulsion was established according to the observation and experimental data. By applying the large-amplitude elongated-body theory, the estimation shows that the hydromechanical efficiency of the undulatory long dorsal fin system is more than 83.12%. It is suggested that the undulatory long dorsal fin propulsion is an adaptation to swimming with high hydromechanical efficiency.]]></description>
<pubDate>2013/3/25 4:43:50</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WANG Guangming,SHEN Lincheng,HU Tianjiang and LI Fei]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Guangming,SHEN Lincheng,HU Tianjiang and LI Fei</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200601022]]></guid><cfi:id>207</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Underdetermined Blind Source Separation of Noisy HarmonicSignals for Rolling Element Bearing Diagnosis]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200601023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Most of the blind source separation methods were dependent on the fact that the observing sensors are more than or equal to the number of signal source. The algorithm in this paper is aimed to research into the blind source separation of noisy harmonic signals from rotating machine when the underlying system is underdetermined, that is, the cases in which the separation of n sources is made from m mixtures while m is smaller than n. Based on the assumption that the input distribution is sparse and the mixture procedure is instantaneous, a potential-function clustering method for estimating the number of information sources was proposed and a calculation on the attenuation matrix and the delay matrix were made. Signal simulation in experiment shows the applicability and reliability of the method under discussion.]]></description>
<pubDate>2013/3/25 4:43:51</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[QIN Guojun and MO Furong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>QIN Guojun and MO Furong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200601023]]></guid><cfi:id>206</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on Online Surveillance System for Underground pipesin Horizontal Direction Drilling]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200601024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Currently, horizontal direction drilling (HDD) has been considered as the mainstream in the trenchless technology used for municipal construction, in which the geo-radar and electromagnetic-based underground pipe detectors are widely used to find the distribution of pipes near the construction route so as to avoid destroying the latent buried pipes. Limited by detection principles, many objects cannot be detected effectively. In this paper, a novel solution for detecting underground pipes is proposed. By introducing tiny ultrasonic detecting system installed on the head of HDD, an online surveillance system for underground pipes was implemented with drilling and detecting implemented simultaneously. As a result, the system gave warning to the operators of the drilling when it detected pipes under the construction route. The experimental results show that construction risks of HDD were reduced considerately and the system proved to be effective.]]></description>
<pubDate>2013/3/25 4:43:51</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[QIAN Yanling,WANG Jianwei,XU Huifeng and WEN Jihong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>QIAN Yanling,WANG Jianwei,XU Huifeng and WEN Jihong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200601024]]></guid><cfi:id>205</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Mechanism Design and Dynamic Analysis on Micro-pipe Robot]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200706021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A creeping micro-pipe robot is designed, which comprises three DC motors and screw-driven units. The three motors are coordinated to realize the creeping motion. Firstly, the load is analyzed for the case that the robot creeps in a vertical pipe. Meanwhile, the mechanical adjustment characteristic for the claws to adapt to the varying pipe size is also discussed. Then with the help of ADAMS software, kinematical and dynamical simulations are presented, which shows the relationship between the driving force, the moving velocity and structural parameters of the robot. Simulations also demonstrate that the robot is applicable to pipes with diameter ranging from 15 to 20mm. The driving force reaches up to 28N and the moving velocity 6mm/s.]]></description>
<pubDate>2013/2/28 5:09:22</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[XIE Xuhui,WANG Honggang and XU Congqi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XIE Xuhui,WANG Honggang and XU Congqi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200706021]]></guid><cfi:id>204</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Application of Wavelet Correlation Feature Scale Entropyto Fault Diagnosis of Roller Bearings]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200706022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A method of the fault detection and diagnosis by combining wavelet correlation filter and Shannon information entropy was proposed. The method was called “wavelet correlation feature scale entropy-fault”. At  first, the weak fault information features were picked up from roller bearings  fault vibration signals by the way of wavelet transform correlation filter, in  order to get high signal to noise scales wavelet coefficients. Then, the defining and computing way of wavelet correlation feature scale entropy was presented, based on the integration of shannon information entropy theory. Wavelet correlation feature scale entropy can quantitatively describe energy distributing of different scales which reflects difference of roller bearings running state, the work states and fault types were estimated by magnitude of the selected wavelet correlation feature scale entropy which can mostly embody fault features. Results and analysis of the diagnosing example reveal that the proposed method can effectively estimate roller bearings fault feature and offer one new way for diagnosing roller bearings.]]></description>
<pubDate>2013/2/28 5:09:20</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZENG Qinghu,QIU Jing,LIU Guanjun and TAN Xiaodong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZENG Qinghu,QIU Jing,LIU Guanjun and TAN Xiaodong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200706022]]></guid><cfi:id>203</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Study of the Characteristics of Partial Porous Air Thrust Bearing]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200706023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A nonlinear model based on the finite element method is provided to compute the static characteristics of partial porous gas thrust bearing, considering the tangential velocity slip at the bearing-film interface. Good agreement is achieved between theoretical and experimental results on static load capacity, mass flow and static stiffness. The new modified Reynolds equation is proved to be a proper model to investigate the characteristics of externally pressurized partial porous gas thrust bearing. With a change to the feeding parameters of permeability coefficient, height or diameter of partial porous restrictors, the effect of the steady state characteristics, such as mass rate of flow, load capacity and static stiffness are studied, Also the performance comparison among the thrust bearings with orifice restrictors, partial porous restrictors and whole porous restrictors shows that this kind of bearing has promising potential in application.]]></description>
<pubDate>2013/2/28 5:09:22</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WANG Jianmin,DAI Yifan and LI Shengyi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Jianmin,DAI Yifan and LI Shengyi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200706023]]></guid><cfi:id>202</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Study on Compensation Control of Cogging Force in PMBLDCLM]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200705024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Cogging force is a main factor that affects the performance of permanent magnetic brushless DC linear motors (PMBLDCLM) at low speed. Since the cogging force cannot be eliminated thoroughly by design method, compensation must be introduced in the control system. Theoretical analysis of an ideal motor control system with cogging force being considered shows that cogging force can be diminished through a position feedback loop. The finite element analysis (FEA) results prove that the thrust fluctuation of the motor at low speed is mainly caused by cogging force and can be compensated for through position feedback control algorithm. A method of dividing a fundamental circle of the cogging force into sections and performing linear compensation at each section is proposed. Since this method does not need any high precision locating equipments and complicated algorithms, it is easy to be implemented. Experiment results show that the motor thrust fluctuation can be diminished effectively with the method proposed.]]></description>
<pubDate>2013/2/28 5:09:09</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LUO Honghao,ZHOU Bo,WU Jun and CHANG Wensen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LUO Honghao,ZHOU Bo,WU Jun and CHANG Wensen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200705024]]></guid><cfi:id>201</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Intelligent Method of Reducing False Alarm in Built-in TestBased on Time Stress Measurement Device-support VectorMachine-hidden Markov Model]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200704021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[False alarm of Built-in Test(BIT) has important influence on system readiness and usage cost. Aimed at solving the problem of false alarm caused by environmental factors, a Time Stress Measurement Device(TSMD) was designed to sample the temperature and vibration of the system. The relationship between false alarm and environmental factors was built based on Support Vector Machine(SVM) which has the advantage of small sample learning. The occurring rule of false alarm was described by using Hidden Markov Model (HMM) which can process dynamic sequential signal well. Then, an intelligent method of reducing false alarm was proposed in terms of TSMD-SVM-HMM. Finally, the method was applied and validated on a helicopter heading attitude system. The experimental results show that the method can effectively recognize and reduce false alarms caused by environmental factors.]]></description>
<pubDate>2013/2/28 5:08:53</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LIU Guanjun<sup>1</sup>,XU Zhe<sup>2</sup>,QIU Jing<sup>1</sup> and LV Kehong<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Guanjun<sup>1</sup>,XU Zhe<sup>2</sup>,QIU Jing<sup>1</sup> and LV Kehong<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200704021]]></guid><cfi:id>200</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of Material Removal Mechanism in MagnetorheologicalJet Polishing by CFD]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200704023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Magnetorheological (MR) jet polishing (MJP), a new type of precision polishing technology in the material removal mechanism, was studied by the method of computational fluid dynamics (CFD). In MJP, the MR jet containing abrasives was magnetized by a local longitudinal magnetic field near the exit of the nozzle so that it could maintain the coherent and stable structure for a long distance. Firstly the mechanism and experiment set-up of MJP were introduced. Secondly the formation of collimated MR jet in a uniform axial magnetic field was analyzed. And then a series of static experiments were conducted to show the characteristics of the distribution of the material removal during the process of MJP. Finally the characteristics of the power density under conditions of both normal and oblique impingements were simulated by CFD method. Simulation and experiment results demonstrate that the material is removed by shearing actions caused by the radial spread flow of the MR jet over the workpiece surface. The method of CFD can accurately predict the 3-D removal rate distribution (polishing spot), thereby facilitating the accurate prediction of spot shapes on surface geometries.]]></description>
<pubDate>2013/2/28 5:08:52</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHANG Xuecheng,DAI Yifan,LI Shengyi and PENG Xiaoqiang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Xuecheng,DAI Yifan,LI Shengyi and PENG Xiaoqiang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200704023]]></guid><cfi:id>199</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Study on Digital Correlation Detection Technology ofQuartz Rate Sensor]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200704024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A method for quartz rate sensor (QRS) using digital correlation detection is proposed to improve the performance of QRS. It requires a pair of orthogonal signals as input of two correlates, which can extract the in-phase and quadrature-phase component from QRS' readout signal. Then the input angular rate will be obtained from these two components. A reference channel is used to generate a pair of orthogonal signals. Phase-locked loop (PLL) and Hilbert transform can be used as the reference channel. By comparison it is concluded that the PLL has better performance than Hilbert transform.]]></description>
<pubDate>2013/2/28 5:08:54</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WU Meiping,LUO Bing and GUO Libin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WU Meiping,LUO Bing and GUO Libin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200704024]]></guid><cfi:id>198</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Fatigue Analysis for Auto Parts Based on the Vehicle VirtualRoad Testing]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200704025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on the vehicle virtual prototype simulation, a new method for auto parts fatigue analysis is presented to avoid the real vehicle tests. In consideration of the modal stress recovery (MSR), the method can accurately solve the flexible multi-body system dynamics under the modal coordinate. By using MSR, the loading spectra of auto parts can be acquired after the virtual prototype's road tests. Then the fatigue test of the parts can be conducted with the loading spectra. This test method was applied to a lower control arm (LCA) of a car's front independent suspension. The result indicates that this virtual fatigue test method is an effective means for auto design and test.]]></description>
<pubDate>2013/2/28 5:08:54</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[SUN Hongzhu,CHEN Xun,LIANG Keshan and Cong Nan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SUN Hongzhu,CHEN Xun,LIANG Keshan and Cong Nan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200704025]]></guid><cfi:id>197</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Study on Relation Analysis Technology between Time Stress and Electromechanical System Faults]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200703021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Time stress measurement device (TSMD) technology is a measurement and recording technology that can be used for stress history recording and data analyzing. The principle and development history of the TSMD were introduced in brief. Then, some relation analysis technologies between time stress and electromechanical system faults based on FMESA and logistic regression were studied. In order to improve the validity of our technologies, a case about the gyro was studied. The results of the case show that the relation analysis technologies between time stress and electromechanical system faults in this paper can effectively find out the electromechanical system faults induced by critical stresses, and can be applied in the fault diagnosis and prediction of electromechanical system.]]></description>
<pubDate>2013/2/28 5:08:41</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LV Kehong,QIU Jing and LIU Guanjun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LV Kehong,QIU Jing and LIU Guanjun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200703021]]></guid><cfi:id>196</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Conceptual Module Identifying for MechanismBased on Graph Partitioning]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200703022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To better actualize product's modular design, the clustering algorithm based on graph partitioning for product's conceptual elements was introduced into the process of product's conceptual design on basis of FBCS (function，behavior，conceptual structure), and a FBCS-based method for product's conceptual module identifying was presented. Stacker's push-puller is taken as a type example while the method of product's conceptual design was analyzed. The method achieved the iterative transforming form function to behavior，form behavior to conceptual structure，form conceptual structure to sub function according to the product's general technology characteristic. To describe the conceptual product，the conceptual product's modeling method which combined black box with function description of IDEF0 was presented to construct the product's function-conceptual structure model. Then，the correlation analysis approach of product's conceptual elements (function，behavior，conceptual structure，interface) was established. To realize the identifying of product's conceptual module，the clustering algorithm based on graph partitioning was adopted to converge product's conceptual elements. This method was proved to be feasible and effective by identifying of the push-puller's conceptual module.]]></description>
<pubDate>2013/2/28 5:08:40</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[GONG Jingzhong,QIU Jing and LI Guoxi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GONG Jingzhong,QIU Jing and LI Guoxi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200703022]]></guid><cfi:id>195</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Application of Additional-signal-enhanced StochasticResonance for Detecting Weak Signals]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200703023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on the theory of SR for detecting weak signals, a novel approach of detecting the weak periodic signal using additional-signal-enhanced SR was presented. This method was analyzed with simulated signals. Through a kind of normalized scale transform, the frequency restriction condition of the signal to be detected was eliminated. The result shows that this method is simple and feasible. The weak sinusoid signal of low signal-to-noise ratio can be extracted from loud noise. The detecting approach indicates a promising prospect for mechanical fault diagnosis.]]></description>
<pubDate>2013/2/28 5:08:41</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[CHEN Min,HU Niaoqing and QIN Guojun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Min,HU Niaoqing and QIN Guojun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200703023]]></guid><cfi:id>194</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Study on Precision Lapping and Polishing Technology ofMicrowave Ferrite Substrates]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200703024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[According to the functional requirement and material characteristic of microwave ferrite substrates, the simulation process of relative motion trace was studied in the parallel lapping and polishing area by using coordinate transformation method, and it provided the theoretic foundation for the reasonable selection of processing parameters. The influence rules of various parameters on lapping efficiency were studied with the orthogonalizing experimental method. On the basis of the above, the parallel lapping and polishing experiments of microwave ferrite substrates were completed by using the optimum combination of processing parameters, and the quality of these substrates satisfied or preponderated the requirements.]]></description>
<pubDate>2013/2/28 5:08:41</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WANG Guilin<sup>1</sup> and ZHANG Feihu<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Guilin<sup>1</sup> and ZHANG Feihu<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200703024]]></guid><cfi:id>193</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Principle and Mathematical Modeling of a New ActiveHeave Compensation System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200703025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A new active heave compensation system (AHCS) was proposed, based on a differential planet transmission mechanism. The velocity adjusting feature of differential gear train was analyzed and the working and compensation principles of the AHCS were presented. Furthermore, in terms of the two main purposes of heave compensation and in accordance with the whole process of hoisting from despot ship to aim ship, a mathematical model was established for the computer control of the system.]]></description>
<pubDate>2013/2/28 5:08:41</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[XU Xiaojun,CHEN Xun and SHANG Jianzhong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Xiaojun,CHEN Xun and SHANG Jianzhong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200703025]]></guid><cfi:id>192</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Study on Air-gap Magnetic Fields Measurement System of High-speedMagnetic Levitation Vehicle]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200703026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Several key technologies were introduced in the development of the air-gap magnetic field measurement system of high-speed magnetic levitation vehicle. The design method of the three-dimensional magnetic sensors and the voltage proportional magnetic field measurement method based on Hall-effect devices were put forward in this paper. It also presented a motion control system with high precision designed for the sensor. The research shows that the developed system has high measurement and orientation precision, and it can perform automatic measurement of the air gap magnetic fields of high speed magnetic levitation vehicle.]]></description>
<pubDate>2013/2/28 5:08:42</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[CHEN Dixiang,PAN Mengchun and LUO Feilu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Dixiang,PAN Mengchun and LUO Feilu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200703026]]></guid><cfi:id>191</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[KPCA-based Technique for Debris Feature Extraction]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200702025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To deal with the problem of Debris' feature extraction with the characteristic of large scale number in description parameter and nonlinear relationship among these parameters, a KPCA-based method is presented. Based on the detailed introduction of KPCA algorithm, a real case was studied for the purpose of constructing a debris automatic recognition sub-system which can be served for diesel engine fault detection and analysis system. The results of experimental research and a comparison with linear PCA demonstrate that KPCA-based approach is feasible and valid for synthesizing nonlinear characteristic parameter and reducing feature dimension.]]></description>
<pubDate>2013/2/28 5:08:28</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LI Yue,WEN Xisen and Lü Kehong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Yue,WEN Xisen and Lü Kehong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200702025]]></guid><cfi:id>190</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Coupling Coefficient Analysisof Fused Polarization-maintaining Fiber Couplers]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200702027]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Coupling coefficient will directly influence the light distribution of linearly polarized light through the Fused-Tapered zone of Polarization Maintaining Fiber(PMF) couplers. Accordingly, it affects the coupling performance of the couplers. Coupling model of fused polarization-maintaining fiber couplers is built on the basis of coupling mode theory of optical waveguide. A new formula for coupling coefficient of PMF couplers has been derived. It is appropriate for any PMF when the core is circular and the birefringent axes are nonaligned. The conclusion of the research can provide the precondition to solve the coupled mode equation and analyze the performance of couplers. Therefore, theoretical direction for the high-performance manufacturing of PMF couplers is provided.]]></description>
<pubDate>2013/2/28 5:08:29</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WANG Jin'e,ZHENG Yu,WU Yulie and LI Shengyi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Jin'e,ZHENG Yu,WU Yulie and LI Shengyi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200702027]]></guid><cfi:id>189</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Manufacturing Equipment ReconfigurationFacing to Process Capability]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200701021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To enhance the rapid response ability of manufacturing system, the machine tools' modular design oriented to reconfiguration was analyzed. Then the general idea of machine tools' reconfiguration oriented to process-capability was presented. The machine tools' reconfiguration arithmetic based on modularization was researched mostly in such aspects as  ability similarity account, relativity analysis, module reconfiguration of lacking ability parameter, module reconfiguration of redundancy ability parameter, ability comparing, module displacing and ability checking up. The arithmetic was validated by the configuration and reconfiguration of machining center, which indicates the arithmetic is feasible and effective.]]></description>
<pubDate>2013/2/28 5:08:15</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WU Baozhong,GONG Jingzhong,LI Guoxi and GUO Mina]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WU Baozhong,GONG Jingzhong,LI Guoxi and GUO Mina</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200701021]]></guid><cfi:id>188</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Directional Drilling Attitude Measurement and AzimuthCorrection with Accelerometers and Magnetometers]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200701022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper proposes an approach of determining the pitch, the roll and the azimuth with three mutually orthogonal accelerometers and magnetometers. The configuration of the system and the calculation of the attitude were firstly described. In order to compensate for the effects of perturbing magnetic fields associated with magnetized sections of the drill collar, a correction method of determining the azimuth which relies on the knowledge of local geomagnetic field was described in great detail. Furthermore, the correction process and simulation were presented. Results from simulation show that the correction method can determine an absolute azimuth by means of using a measuring instrument disposed in a relatively short non-magnetic drill collar, so it minimizes the length of non-magnetic drill collar and saves drilling costs greatly.]]></description>
<pubDate>2013/2/28 5:08:15</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LUO Wusheng,XU Tao and DU Liebo]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LUO Wusheng,XU Tao and DU Liebo</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200701022]]></guid><cfi:id>187</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Study of Mechanical Coupling in Quartz MicromachinedGyroscope System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200701027]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The mechanical coupling of micromachined quartz gyroscope was studied and modeled, the relationship between output signal and mechanical coupling of gyroscope was derived by comparing and analyzing ideal and non-ideal models. The influence of mechanical coupling on parameter of gyroscope was demonstrated by simulation.]]></description>
<pubDate>2013/2/28 5:08:15</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[XIE Liqiang,WU Xuezhong and LI Shengyi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XIE Liqiang,WU Xuezhong and LI Shengyi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200701027]]></guid><cfi:id>186</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research of the Tooth Contact and Stress Analysis ofSpherical Gear Drives]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200806025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The spherical gear is a new gear-driven mechanism with a double degree of freedom. Based on the mathematical models of spherical gears, the meshing model is obtained and tooth contact analysis is performed, so the location of contact points on teeth surfaces is received by using nonlinear solver. The structural shape of the tooth surface is studied. To the point contact form of meshing spherical gears between a convexity and a saddle surface, contact ellipses of meshing tooth surfaces are studied, and then the movement rule of contact ellipses when spherical gear pairs mesh in any swaying plane that passes through polar axes of spherical gear pairs is gained: Contact ellipses are little on teeth base and teeth tip, so contact stress is large; Contact ellipses are relatively large on teeth mid-position, so contact stress is little. Finite element analysis is applied to perform bending stress analysis and tooth contact stress analysis, and the result validates the correctness of the movement rule of contact ellipses. The study is useful for further investigations in transmission theory and practical applications of spherical gear pairs.]]></description>
<pubDate>2012/12/7 2:58:05</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LI Ting,PAN Cunyun,ZHANG Lijie and LI Mingyu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Ting,PAN Cunyun,ZHANG Lijie and LI Mingyu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200806025]]></guid><cfi:id>185</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Decision Table Reduction Based on Evidence Entropy forUncertainty Measures]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200805019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Knowledge reduction is one of the important topics in the research on rough set theory, and rough decision rules are inevitably provided with uncertainty. In this paper, a family of focal sets is constructed within the framework of evidence theory on the basis of variable precision rough set theory. Accordingly, the function of basic probability assignment is defined, and then the total information entropy is calculated for evidence theory, namely the evidence entropy. Uncertainty measure for the decision table is determined by that entropy. Based on the measure, the heuristic algorithm is proposed for decision table reduction. Finally, the experimental results show the validity of the methodology.]]></description>
<pubDate>2013/3/11 3:01:23</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[SONG Lijun,HU Zheng,YANG Yongmin and WEN Xisen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SONG Lijun,HU Zheng,YANG Yongmin and WEN Xisen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200805019]]></guid><cfi:id>184</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Magnetorheological Finishing for MgF<sub>2</sub>CrystalProcessed under High Temperature and High Pressure]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200805020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Magnesium Fluoride crystal processed under high temperature and high pressure, one of the infrared optic material, has been used in many areas. Magnetorheological finishing (MRF) is becoming an ultra-precision finshing technology because of its excellencies of high polishing efficiency, no wear and certain polishing. In this paper, at the first, the polishing characteristics are obtained by using traditional polishing method; and then, a new magnetorheological fluid suitable to finishing Magnesium Fluoride is developed. Compared to traditional polishing method, the method proposed here can yield higher surface quality and higher polishing efficiency.]]></description>
<pubDate>2013/3/11 3:01:23</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[DAI Yifan,YUAN Zheng,CHEN Haofeng and YIN Ziqiang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>DAI Yifan,YUAN Zheng,CHEN Haofeng and YIN Ziqiang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200805020]]></guid><cfi:id>183</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A New Wheel-leg Hybrid Mobile PlatformBased on the Spherical Gear]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200804019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The hybrid locomotion system is a hotspot in mobile robot research. This paper firstly gives a brief review of the achievements accomplished in wheel-leg hybrid mobile platform, and the structural characters. Based on the spherical gear mechanism, a new mobile platform with wheel-leg hybrid mechanism is put forward. The wheel-leg mechanism has a novel character, that is, the wheel mode and the leg mode can be fused not only in structure but also in their function. As a result, the mobile platform has three mobile modes: independent wheel mode, independent leg mode and wheel-leg-fusion mode. The mobile platform can realize several mobile poses such as straight moving, sloping moving, turning in a smaller radius and even turning-in-place. The current design was testified by the results of simulation using virtual prototype technology and experiments based on the wheel-leg-system and the mobile platform physical prototype.]]></description>
<pubDate>2012/12/7 2:57:38</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHANG Xiang,ZHANG Lijie,PAN Cunyun and LI Mingyu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Xiang,ZHANG Lijie,PAN Cunyun and LI Mingyu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200804019]]></guid><cfi:id>182</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Research on Time Encoded Signal Processing for Real-timeFault Detection of Turbopump]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200804020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To increase the validity of real-time fault detection of turbopump in Liquid-propellant rocket engine, a new signal processing method called modified Time Encoded Signal Processing and Recognition (TESPR) was presented to extract the features of vibration signal in real time. To extend the application of TESPR, the constraint about the duration of signal waveform components was abolished and a new encoding method was advanced. By the test of vibration data from normal as well as abnormal turbopump, the stability of this method and its affectivity for fault detection were verified. It shows that this signal processing method can be applied to turbopump fault detection.]]></description>
<pubDate>2012/12/7 2:57:38</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[QIN Guojun,MA Yuanyuan and HU Niaoqing]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>QIN Guojun,MA Yuanyuan and HU Niaoqing</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200804020]]></guid><cfi:id>181</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Test of Parameters of a Compact Tesla Transformer]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200804023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Difficulties in the measurement of the couple coefficient for a compact Tesla transformer is solved using the method proposed by I. D. Smith. The couple coefficient was experimentally measured to be about 0.9, a little lower than the figure designed. The reasons for the decrease in the couple coefficient were presented. Electrical parameters of the Tesla transformer's circuits were estimated by experimental voltage waveforms, which is in good agreement with that from theoretical calculation. The Tesla transformer can meet the requirements of high-voltage charge to the forming line (FL).]]></description>
<pubDate>2012/12/7 2:57:38</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHANG Zicheng,YANG Hanwu,ZHANG Jiande,QIAN Baoliang,MENG Zhipeng,LI Da,WANG Songsong and CAO Yibing]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Zicheng,YANG Hanwu,ZHANG Jiande,QIAN Baoliang,MENG Zhipeng,LI Da,WANG Songsong and CAO Yibing</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200804023]]></guid><cfi:id>180</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Study on the Generating Mechanism of Exciting Signals andthe Performance of Vibrators Fixed on Repetitive Shock Machines]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200804024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In this paper, the mechanical model of the stepped piston vibrator is constructed and the generating mechanism of impact signal produced by the vibrator is studied firstly. Then based on experiments, the exciting signals produced by two common kinds of stepped piston vibrators are emulated under different pressure values. Finally the low frequency energies of exciting signals are taken as the performance indexes of vibrators and two kinds of vibrators are evaluated. The results of this paper show that big vibrators are superior to small ones under different pressure values.]]></description>
<pubDate>2012/12/7 2:57:38</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WANG Kao,TAO Junyong and CHEN Xun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Kao,TAO Junyong and CHEN Xun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200804024]]></guid><cfi:id>179</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Novel Method for Real-time CNC Curved PathInterpolation Calculating]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200803024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on the principle of parametric curve paths CNC interpolating, it is pointed out that the Taylor series methods and “Parameter-Arc-length” curve fitting methods for CNC curved path interpolation are not perfect in theory. Thus a novel curved path interpolation method is proposed with Newton iteration functions. The detailed realization of the proposed algorithm has also been given. It has many advanced features, such as good stability, fast convergence, low computational effort and high precision. Simulations and experimentations show that the proposed algorithm can reduce the feedrate fluctuation by 10<sup>2</sup>-10<sup>7</sup>times with equal or little more computational effort comparing with Taylor series methods.]]></description>
<pubDate>2012/12/7 2:57:24</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[SUN Haiyang,FAN Dapeng and LI Ling]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SUN Haiyang,FAN Dapeng and LI Ling</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200803024]]></guid><cfi:id>178</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on Attenuating the Wheel Speed Sensor ErrorsBased on Resilient BP Neural Network]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200803026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Being the main source of vehicles' movement state parameters, wheel speed is central for control systems and its accuracy affects their performance. In order to attenuate the wheel speed sensor errors and reduce the research and manufacture cost, an error estimation method based on resilient back propagation (BP) is presented. The improved resilient BP neural network is applied to estimate the sensor errors. Matching algorithm is illustrated to realize the corresponding errors. Theoretical analysis and simulation results show that the proposed method can make the error less than 2×10<sup>-4</sup> rad, so it can effectively attenuate the sensor errors and improve the accuracy of the wheel speed signal.]]></description>
<pubDate>2012/12/7 2:57:24</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHANG Qi,XIE Xiufen,LIU Guofu and LIU Bo]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Qi,XIE Xiufen,LIU Guofu and LIU Bo</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200803026]]></guid><cfi:id>177</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Study on Modeling and Performance of a Fast Tool Servo SystemDriven by Voice Coil Motor]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200801017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The application scopes of complex shape and structure units are becoming much wider. The problem is that these units are both complex in shapes and micro in structures. In order to mach complex form parts with high efficiency, the characteristics of fast tool servo process were analyzed in this paper, and a fast tool servo (FTS) system was developed, driven by voice coil motor. The characteristics of dynamics and electromagnetics were thoroughly analyzed, the transfer function model of FTS system was founded, and the control method was designed. On the basis of the above work, the performance of FTS system was tested. The result shows that the FTS system works with high resolution, good locating accuracy and high response, and it can act as fast feeding device of tool in fast tool servo process.]]></description>
<pubDate>2012/12/7 2:56:54</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[DAI Yifan,DUAN Weiran,WANG Guilin and YANG Fan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>DAI Yifan,DUAN Weiran,WANG Guilin and YANG Fan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200801017]]></guid><cfi:id>176</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Statistical Analysis of Accelerated Life Testing for Productswith Operational Period]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200801020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Accelerated life testing (ALT) of a product or material can obtain information quickly on its life or reliability information. Products or materials with operational period are often sampled and tested to evaluate their residual life. However, it is a main challenge how to deal with the operational period in statistical analysis for ALT application. The products are often treated as “new after operation” or “memoryless” and their operational period is ignored in residual-life evaluation on the assumption that their failure times follow exponential distribution. Since failure times of many mechatronic products follow Weibull distribution, the estimated precision of residual life of the products is low in the way mentioned above. This paper presents a novel approach based on equivalent time to statistically analyze ALT data of products or material with operational period. Estimated precision of the approach was studied by Monte Carlo simulation method. Results show that the approach can effectively estimate the residual life of the products and is more precise than  that adopted previously.]]></description>
<pubDate>2012/12/7 2:56:53</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WANG Yashun,ZHANG Chunhua,CHEN Xun and TAN Yuanyuan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Yashun,ZHANG Chunhua,CHEN Xun and TAN Yuanyuan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200801020]]></guid><cfi:id>175</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Efficient Diagnostic Strategy Generation withNon-independent Tests]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200801021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Diagnostic strategy design is an important task in the design for testability(DFT). In light of the fact that the practical tests are non-independency or costs of the texts are precedence-dependent, tests were considered to be distributed among multiple modes, and additional transition costs were considered if a test sequence involved mode changes. Then test costs and mode transition costs were combined to establish a heuristic evaluation function(HEF). Based on this HEF, a suboptimal diagnostic strategy searching algorithm was presented. Several cases were used to verify this method, and the experimental results show that this method efficiently solves the problem of diagnostic strategy generation with non-independent tests.]]></description>
<pubDate>2012/12/7 2:56:54</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[YANG Peng,QIU Jing and LIU Guanjun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YANG Peng,QIU Jing and LIU Guanjun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200801021]]></guid><cfi:id>174</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Development of Pointing Error and Sensitivity Analysis ofOpto-electrical Stabilization Mechanism]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200801022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The mechanism of opto-electrical stabilization is widely used in the field of observation and measurement of the armament. Its pointing accuracy relates the realization of function as target realization or tracking. As the important source of pointing error, the geometric error of the mechanism is inevitable. So the paper develops the model of pointing error using the method of multi-body system error's development, which adopts the azimuth-elevation mechanism as the example. The effects of error sources are also compared according to the statistical and sensitivity analysis. The research can be applied not only to the estimation of pointing error during designing, but also to the allocation and calibration of errors.]]></description>
<pubDate>2012/12/7 2:56:54</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LI Yan and FAN Dapeng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Yan and FAN Dapeng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200801022]]></guid><cfi:id>173</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Design of Control System for an Active HeaveCompensation Crane With DSP]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200801023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on TMS320L F2407, a micro-computer control system used for an active heave compensation crane is designed. The working principle and function request of the control system is analyzed. The designing of the kernel of the DSP control system and the peripheral circuit were described in detail. The foreword channel, RS-224 serial man-machine interface, backward channel and the whole DSP control system software were designed, and the simulations were done with the MATLAB. The control system was implemented in a reduce-scaled prototype of the active heave compensation crane, and the test results show  that the prototype works with a stable state of the active compensation character.]]></description>
<pubDate>2012/12/7 2:56:54</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[XU Xiaojun,HE Ping,CHEN Xun and SHANG Jianzhong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Xiaojun,HE Ping,CHEN Xun and SHANG Jianzhong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200801023]]></guid><cfi:id>172</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Influence of the Fabrication Error in IBF on the Scattering Loss]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200906016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The removal function in ion beam figuring (IBF) exerts great influence on the fabrication residual error of optical surface, so that the performance of optical surface is changed because of the surface scattering induced by the fabrication residual error. In order to reduce the influence of the fabrication residual error on the optical performance, the IBF simulation procedure based on the computer controlled optical surfacing (CCOS) technique was used in surfacing the optical mirrors, and the influence of the removal function width on the ratio of scattering loss (RSL) was analyzed. It was shown that the influence of the fabrication residual error on the RSL declines with decrease of the removal function width. Thus the removal function width can be chosen reasonably according to the influence of the fabrication residual error on the RSL and the requirement of RSL index, and the processing technique can be optimized  under the condition of satisfying the surface accuracy requirement of the optical mirrors.]]></description>
<pubDate>2012/11/8 3:50:44</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WU Dongliang,DAI Yifan,WANG Guilin,ZHOU Lin and JIAO Changjun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WU Dongliang,DAI Yifan,WANG Guilin,ZHOU Lin and JIAO Changjun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200906016]]></guid><cfi:id>171</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Mechanism and Influencing Factors on Surface Roughness ofUltra-smooth Polishing of Chemical Vapor Deposition Silicon Carbide]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200906017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To realize the super-smooth polishing of chemical vapor deposition silicon carbide (CVD SiC), nano-scratch test is applied to study the critical load for brittle-ductile transition, and its polishing mechanism is analyzed according to the force on an abrasive grain. Furthermore, the influencing factors on the surface roughness are systemically investigated by experiments from the aspects of material characteristics, processing parameters and pH values of the polishing fluids. The research results show that the polishing mechanism for CVD SiC in a steady polishing process is a ductile scratch process of abrasive particles on the surface of CVD SiC. The inhomogeneity of CVD SiC grains and surface high spots degrade the surface finish. The surface roughness increases near-linearly with the abrasive particle size in a certain extent, and increases with the hardness of polishing pad. However, the effect of polishing pressure on surface roughness is related to the deformation behavior of polishing pad, i.e., when polishing pad has an elastic or elastic-plastic deformation, surface roughness increases with polishing pressure in a narrow range; when polishing pad has a plastic deformation, polishing pressure has no obvious effect on surface roughness. In addition, polishing velocity and the pH value of polishing fluid have little effect on surface roughness. The research results provide a quantitative experimental basis for the optimization of selecting processing parameters during the super-smooth polishing of CVD SiC.]]></description>
<pubDate>2012/11/8 3:50:43</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[KANG Nianhui,LI Shengyi and ZHENG Ziwen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>KANG Nianhui,LI Shengyi and ZHENG Ziwen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200906017]]></guid><cfi:id>170</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Studies on the Optimization of Latin hypercube designs for ComplexSystem Simulation]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200906018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The optimization of Latin hypercube design is an important area of the space filling experimentations. The existing procedures to find optimal LHD by minimizing the pairwise correlations or maximizing the minimum inter-site distance in traditional LHD optimization are introduced, and their drawbacks are discussed in these methods. This paper proposes a multi-objective optimization approach to find optimal LHD by combining pairwise correlation and the maximin inter-site distance performance measures by modified ESE algorithm. Several examples are presented to show that the optimal designs are good in terms of both the correlation and distance criteria.]]></description>
<pubDate>2012/11/8 3:50:44</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LIU Xinliang and GUO Bo]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Xinliang and GUO Bo</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200906018]]></guid><cfi:id>169</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Availability of Series Repairable Systems under Imperfect Repair]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200906019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Availability, as a scale of the reliability and maintainability level, is an important parameter of repairable system. A method of calculating system availability for series repairable system is studied in the current research. From the states of components, the methodology presented uses a gamma distribution to model the material degradation, and the impact of imperfect maintenance actions on the system reliability is investigated. At last, a numerical example is presented to demonstrate the use of the model.]]></description>
<pubDate>2012/11/8 3:50:44</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[TAN Lin,CHENG Zhijun and GUO Bo]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>TAN Lin,CHENG Zhijun and GUO Bo</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200906019]]></guid><cfi:id>168</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Driving Axle Housing Accelerated Fatigue Bench Test Based on FEA]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200906020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on finite element virtual bench test, a new method to acquire the reduced load spectrum, which is used to conduct accelerated fatigue bench test of driving axle housing, is brought up in this paper. After static strength analysis, fatigue life prediction, strain history acquisition and time correlated damage analysis, the reduced load spectrum for the accelerated fatigue bench test of a military special vehicle driving axle housing was acquired under the FE simulation circumstance. The bench test result shows that the reduced load spectrum can significantly shorten the test period, while the damage can be preserved as well, which proves the value of the method.]]></description>
<pubDate>2012/11/8 3:50:44</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[CONG Nan,CHEN Xun,SHANG Jianzhong and LIANG Keshan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CONG Nan,CHEN Xun,SHANG Jianzhong and LIANG Keshan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200906020]]></guid><cfi:id>167</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Study on the Cross Interaction of Rail-coil CombinedElectromagnetic Gun]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200905014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The drive force, the rail-coil cross interaction and the system performance of the rail-coil combined electromagnetic gun have been researched, and an improved structure with four rails distributed symmetrically has been proposed. The theoretical analysis and numerical computation of the structure show that the rail-coil cross interaction brings considerable transverse pressure and motion instability to the normal two-rail combined EM gun, while the four-rail combined EM gun successfully eliminates the negative effect of the cross interaction and obtains much better performance.]]></description>
<pubDate>2012/11/8 3:52:02</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LIU Yanpeng,YANG Lijia,LIU Zhenxiang and OUYANG Jianming]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Yanpeng,YANG Lijia,LIU Zhenxiang and OUYANG Jianming</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200905014]]></guid><cfi:id>166</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Approach to Product Modular Design Based on FPBS]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200905015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[By combining decomposition topology model of iterative design for mechanical products with modularization, a modular design method for mechanism based on function-principle-behavior-structure is put forward. Product iterative design decomposition principle based on function-principle-behavior-structure is mainly discussed. Portrait iterative process of function(principle(behavior(structure(function evolvement during design decomposition is analyzed. Transverse dynamic modeling means of product design decomposition is clarrified. Basic modular design method for complicated mechanism based on FPBS is established by introducing modulization into the product iterative design composition process.]]></description>
<pubDate>2012/11/8 3:52:02</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LI Guoxi<sup>1</sup>,WU Jianzhong<sup>2</sup>,ZHANG Meng<sup>1</sup>,GONG Jingzhong<sup>1</sup> and CHANG Pinyao<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Guoxi<sup>1</sup>,WU Jianzhong<sup>2</sup>,ZHANG Meng<sup>1</sup>,GONG Jingzhong<sup>1</sup> and CHANG Pinyao<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200905015]]></guid><cfi:id>165</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on Modeling and Simulating Seafloor Reverberationwith the Moving Sonar]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200905018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on the representation of impulsive sound propagation with the moving source and receiver, a seafloor reverberation signal model is derived from the monostatic sonar moving horizontally in horizontally stratified oceans. Then, a method for simulating reverberation time series is presented with the seafloor divided into range-azimuth cell. It is found that the method can effectively solve the problem that correlated scatter coefficient between different normal modes is difficult to be expressed, and the delay-doppler distance for any cell is less than rated resolution. The power spectrum and the probability density of simulation results show the validity of the modeling and simulation method.]]></description>
<pubDate>2012/11/8 3:52:02</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[GUO Xiye,SU Shaojing and WANG Yueke]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GUO Xiye,SU Shaojing and WANG Yueke</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200905018]]></guid><cfi:id>164</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of the Vibration System Parameters in theAir-modulated Speaker]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200905019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Through the comparison of the experiment data with the theory results, the damp influence of the airflow on the vibration system is analyzed. Furthermore, based on the experiment sound source, how the parameters of the vibration system may influence the voice coil amplitude, such as coefficient of elasticity, magnetic flux density, the mass, resistance, inductance and winding strands of the voice coil, is studied using equivalent circuit method. Finally, methods to choose these parameters are presented for the purpose of speech broadcasting or generating low frequency sound waves.]]></description>
<pubDate>2012/11/8 3:52:02</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[XU Wei<sup>1</sup>,GONG Changchao<sup>2</sup> and ZENG Xinwu<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Wei<sup>1</sup>,GONG Changchao<sup>2</sup> and ZENG Xinwu<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200905019]]></guid><cfi:id>163</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Borescope and Eddy Current Integrative In-situ DetectingDefects in Aeroengine Laminas]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200905020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[At present, borescope inspection is the only technique for in-situ detecting defects in aeroengine laminas, but the inspection performance is poor by using borescope to detect cracks in laminas. Therefore, borescope and eddy current integrative testing technique was presented, combining the advantages of these two techniques. The technique can achieve in-situ detecting defects in aeroengine laminas. A borescope and eddy current integrative testing probe used for aeroengine laminas was developed. A testing example of aeroengine lamina using the probe was given. The testing results show that the inspection performance is high using borescope and eddy current integrative testing techniques, and the cracks can be estimated quantitatively. It was concluded that the integrative testing technique is superior to single borescope inspection, and it is very valuable for practical application.]]></description>
<pubDate>2012/11/8 3:52:02</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[TIAN Wugang,PAN Mengchun,LUO Feilu and CHEN Dixiang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>TIAN Wugang,PAN Mengchun,LUO Feilu and CHEN Dixiang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200905020]]></guid><cfi:id>162</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Novel Path Used in Computer-controlled Polishing ProcessBased on Uniform-area-increment Spiral]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200904001]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Archimedes spiral path, which is widely used in computer-controlled polishing process, always brings about excessively high rotational speed, and consequently excessive machining when polishing central region of the work-piece. To resolve this problem, the characteristics of a universal spiral path are studied first. It shows that the instantaneous rotational speed of the work-piece depends on the local dwell-time density and the local increase rate of the area enclosed by the spiral. Based on this, a novel spiral was proposed as a polishing path. The increase rate of the area enclosed by this new spiral is constant, and therefore, it can be referred to as uniform-area-increment spiral. This spiral path can ensure the stableness of the rotational speed of the work-piece, and reduce the rotational speed in the central region. Consequently, it can reduce the demands on motion performance to machine, and reduce the cost for machine and process. Finally, experimental results verified that Archimedes spiral path causes excessive machining in the central region due to excessive demand for rotational speed, and results in lower precision, while the uniform-area-increment spiral path avoids the excessive machining in the central region and results in higher precision.]]></description>
<pubDate>2012/11/8 3:52:16</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHOU Lin,DAI Yifan,XIE Xuhui and LI Shengyi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHOU Lin,DAI Yifan,XIE Xuhui and LI Shengyi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200904001]]></guid><cfi:id>161</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Algorithm and Implementation of MagnetorheologicalFinishing with Spiral Scan Mode]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200904002]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The algorithm and implementation of Magnetorheological Finishing with spiral scan mode was researched. The algorithm implemented changes the removal function matrix to the coefficient matrices of the linear system of equations for dwell-time calculation. These equations are resolved quickly because the coefficient matrices are sparse. The variations of speed on the spiral path are obtained by the allocation of the dwell time and the work piece can be processed well using the machine that contains the information about the MRF process. An experiment on a K9 circular plane mirror is made on the KDMRF-200 machine developed by us. The RMS surface error is 0.02λ(λ=632.8nm) through the 2nd iteration.]]></description>
<pubDate>2012/11/8 3:52:16</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[HU Hao,PENG Xiaoqiang,DAI Yifan and SHI Feng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HU Hao,PENG Xiaoqiang,DAI Yifan and SHI Feng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200904002]]></guid><cfi:id>160</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Study on Machining Small Precision Optical ComponentUsing Thin Ion Beam]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200904003]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[With the development of modern optical technology, there has been a basic requirement to control the surface error in all spatial frequency ranges for precision optics. The low spatial frequency range error of the surface can be easily and effectively eliminated by CCOS methods, but for the surface error in the middle and high spatial frequency ranges, there are few effective methods to correct them. Hence it has becomes a universal concern in modern optical manufacturing because of its serious influence on some modern precision optical systems. As is proved previously, the correcting ability of middle and high frequency error can be improved by reducing the size of the polishing lap. Based on this theroy, the small ion beam figuring methode has been intruduced to solve the problem of mid and high frequency error correcting. Firstly, we studied how to gain small and steady ion beams by two methods. Then we designed a series of actual figuring experiment and computer simulation to test the effectivness of those mothods on small scale optic surfaces. The desired results have been gained to reduce the surface error from 0.111λ rms to 0.015λ rms (λ=632.8nm).]]></description>
<pubDate>2012/11/8 3:52:16</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[XIE Xuhui,GU Wenhua and ZHOU Lin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XIE Xuhui,GU Wenhua and ZHOU Lin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200904003]]></guid><cfi:id>159</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Capability of Phase Retrieval Metrology for Mirrors]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200904004]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Applying phase retrieval to mirror metrology can simplify the measurement system and increase the ability of resisting the vibration effects. The capability of phase retrieval testing system for mirrors is described from two aspects: its hardware and algorithm. According to the theory of Fourier optics and geometry optics, the pixel size and the total size of CCD spherically limit the f-number and the departure of a wavefront respectively. The adjustability of phase retrieval algorithm to different figure errors is observed afterward. A series of simulation experiments show that the algorithm is high-powered when the period of figure errors is about 31.4mm, and the performance is weaker when over or under that frequency; but the algorithm is reliable when the RMS value is up to six wavelength or as small as one percent wavelength.]]></description>
<pubDate>2012/11/8 3:52:16</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[DING Lingyan,WU Yulie and Li Shengyi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>DING Lingyan,WU Yulie and Li Shengyi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200904004]]></guid><cfi:id>158</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on Process Optimization of Magnetorheological FinishingBasing on Predictive Model of Removal Function]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200904005]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A predictive model of removal function in MRF has been established based on an analysis of MRF process. According to the residual surface error before and after finishing as well as the simulative residual surface error, this model can identify the efficiency coefficient of removal function with varieties of material and achieve exact prediction of removal function. Based on this model, the MRF process can be optimized by identifying the efficiency coefficient of removal function. A HIP SiC mirror which isin size had been polished nine times with this optimal MRF process. As a result, its residual surface error decreased from PV 0.72μm and RMS 0.108μm to PV 0.13μm and RMS 0.012μm, tested by        sub-aperture stitching technique. The experiments indicate that the predictive model of removal function can optimize MRF process, improve the finishing determinacy and enhance the process flexibility so as to achieve high-precision and deterministic MRF of optical mirror.]]></description>
<pubDate>2012/11/8 3:52:17</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[SONG Ci,PENG Xiaoqiang,DAI Yifan and SHI Feng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SONG Ci,PENG Xiaoqiang,DAI Yifan and SHI Feng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200904005]]></guid><cfi:id>157</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Study on the Mechanism and Arts of MagnetorheologicalFinishing (MRF) by Nano-sized Diamond Abrasives]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200904006]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Material removal mechanism in MRF process by nano-sized diamond abrasives is proved to be a plastic shear removal. Process experiments showed the relationship between polishing parameters (rotation speed, gap between polishing wheel and work piece, and intensity of magnetic field) and peak removal rate or surface roughness. Polishing spot is proved to be stable and repeatable. Within 2.5h, the change of peak removal rate is below ±0.3% and the change of volume removal rate is below ±0.5%. One HIP SiC flat (202mm in diameter) is polished with KDMRF-1000F polishing machine and KDMRW-3 water-based MR fluids. After rough polish (30h) and finishing polish (9h), its surface form accuracy peak-to-valley (PV) is 0.13um, root-mean-square (RMS) is 0.012um and roughness RMS is 2.439nm.]]></description>
<pubDate>2012/11/8 3:52:17</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[SHI Feng,DAI Yifan,PENG Xiaoqiang,KANG Nianhui and LIU Zhijun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SHI Feng,DAI Yifan,PENG Xiaoqiang,KANG Nianhui and LIU Zhijun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200904006]]></guid><cfi:id>156</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Fabrication of Array Lens Optical Component by Using ofSlow Tool Servo Diamond Turning]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200904007]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Slow Slide Servo, in comparison with Fast Slide Servo, is a novel machining process capable of generating freeform optical surfaces or rotationally non-symmetric surfaces at high level of accuracy. It is processed in the polar and cylinder coordinates with the method of C, X and X axes. Micro-optical devices, e.g., micro lenses, micro mirrors, play an important role in high speed data, voice and video signal transmissions. Micro array lens can be treated as a freeform surface and therefore can be machined by slow tool servo method. In the tool radius compensation, the discontinuity of normal direction may cause the lathe motion beyond servo axis' capability. In the current research, servo axes limitation motion capability was analyzed and two tool radius compensation methods were studied. Experiments show that by correctly selecting tool radius compensation method, slow tool servo can manufacture array lens in a single operation and accurate geometry and optical surface finish can be obtain.]]></description>
<pubDate>2012/11/8 3:52:17</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[GUAN Chaoliang,TIE Guipeng and YIN Ziqiang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GUAN Chaoliang,TIE Guipeng and YIN Ziqiang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200904007]]></guid><cfi:id>155</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A High Precision Perpendicularity Measurement Method and Analysis for Internal Surfaces]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200904008]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[High precision perpendicularity measurement of internal surfaces of frame parts is one of the most difficult problems in manufacturing. A novel method based on wave-front interferometer to measure the internal surfaces of frame parts is introduced in this paper, and the influencing factors in the measurement are also discussed theoretically. The experiment results show that the method can achieve high perpendicularity measurement accuracy of 0.6". Considering the distribution of the perpendicularity errors derived, the measurement results can be used in error correction machining of the parts.]]></description>
<pubDate>2012/11/8 3:52:17</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHENG Ziwen,LIU Jingpo and CHEN Shanyong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHENG Ziwen,LIU Jingpo and CHEN Shanyong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200904008]]></guid><cfi:id>154</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis and Design of Voice-coil Actuator Used in Fast Tool Servo]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200904009]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Free-Form optics have complicated surfaces and the fast tool servo（FTS）is a highly effective method to fabricate such parts. With regard to the fact that the piezoelectric FTS actuator has limited fabricating capacity as of its low stroke, a long stroke FTS project driven with voice coil actuator (VCA) was presented. Compared with piezoelectric actuator, the VCA can fabricate broader range of parts owing to its longer stroke. Illustrated with a typical optical freeform part, the key performance parameters of FTS are analyzed. The structure of VCA was given, the theoretical model of VCA was built, the closed-loop controller was designed and the actual performance of VCA actuator was tested. The test results indicate that the designed VCA actuator has long stroke and high frequency response, and the frequency response can reach 300Hz when at stroke of 200μm, More important, at this level of stoke, the frequency response presented is better than similar products abroad.]]></description>
<pubDate>2012/11/8 3:52:17</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[YANG Fan,YANG Haikuan,CHEN Zhihua and WANG Guilin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YANG Fan,YANG Haikuan,CHEN Zhihua and WANG Guilin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200904009]]></guid><cfi:id>153</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Closed-loop Driving Method of Microgyroscope]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200903023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to achieve high excitation efficiency, a resonance loop for microgyroscope is designed based on phase control technology to generate drive mode resonance. In order to improve the stability of microgyroscope, a PID controller with best ITAE criterion is designed to keep the drive oscillation amplitude invariable. A closed-loop drive circuit is fabricated and tested. The results show that the oscillation frequency of the fabricated drive loop is very close to the drive mode frequency. With the adoption of PID controller, the variance rate of the drive oscillation amplitude is merely 0.1% in the temperature range of -40℃～80℃.]]></description>
<pubDate>2012/11/8 3:52:33</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[XIAO Dingbang,HOU Zhanqiang,MAN Haiou,WU Xuezhong and LI Shengyi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XIAO Dingbang,HOU Zhanqiang,MAN Haiou,WU Xuezhong and LI Shengyi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200903023]]></guid><cfi:id>152</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Survivability Definition and Model for UnderwaterMonitoring System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200902021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Survivability helps ensure that underwater monitoring systems provide essential services under conditions of attacks, failures, and accidents. To evaluate the survivability of such systems accurately, definition of survivability and its model is proposed in this paper. Survivability, the ability of a system to meet user's requirement of service when the system is affected by some events in a specified environment, and is computed by mathematical expectation of services performance. This method will have more precise result than others in judging whether system design achieves the criteria of survivability. To the survivability model based on multi-state system, service performance  is the function of state of all subsystems, which is related to structure function of system. Probability distribution of subsystem's states is decided by reliability and security. In the end, an illustrative example is presented to prove the effective of the survivability model is presented in the end.]]></description>
<pubDate>2013/1/31 4:04:33</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHOU Rui,QIAO Chunjie and WANG Yueke]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHOU Rui,QIAO Chunjie and WANG Yueke</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200902021]]></guid><cfi:id>151</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Dwell Time Algorithm Based on Vector for MRF Process of Optics]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200902022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A dwell time algorithm for magnetorheological finishing (MRF) process of optics is developed in this paper. Firstly, the vector of residual heights of the control nodes is calculated, and the removal rate of the “polishing spot” at each control node is written into a removal matrix. Then, a nonnegative least-squares method is used to obtain the optimal solution of the dwell time. With this algorithm, a spherical surface (145mm aperture) is polished on the MRF machine developed by ourselves. After two iterations, PV values λ/15, RMS values λ/125, and Ra ，0.57nm.]]></description>
<pubDate>2013/1/31 4:04:33</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[SHI Feng,DAI Yifan,PENG Xiaoqiang and SONG Ci]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SHI Feng,DAI Yifan,PENG Xiaoqiang and SONG Ci</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200902022]]></guid><cfi:id>150</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Detection of Subsurface Damage and Material RemovalMechanism in Optical Polishing Process]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200902023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Subsurface damage (SSD) may still exist in polished elements, which influences laser induced damage threshold and optical performance. Therefore, SSD must be reduced and finally removed from the polished surface to improve the service performance of optical elements. Hence it is required to make the accurate detection and characterization of the polishing SSD. In the current approach, firstly, the depth of hydrolyzed layer and embedded polishing contaminants were detected with constancy chemical etch rate technique and secondary ion mass spectrography, respectively. Then, dimension of subsurface plastic scratches was measured with atomic force microscope. Furthermore, the development of surface roughness with depth was analyzed, in order to discuss the correlation among superficial flow layer, hydrolyzed layer, and subsurface plastic scratches. Finally, the SSD model in polishing process was established, and, material removal mechanism was proposed on the basis of the model. The results show that hydrolyzed layer contains superficial flow layer, plastic scratches, and polishing contaminants. The depth of hydrolyzed layer on polished fused silica surface ranges from 76nm to 105nm. Optical polishing process is responsible for the corporate effects of hydrolyzed action, mechanical removal, and plastic flow.]]></description>
<pubDate>2013/1/31 4:04:32</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WANG Zhuo<sup>1</sup>,WU Yulie<sup>1</sup>,DAI Yifan<sup>1</sup>,LI Shengyi<sup>1</sup>,LU Defeng<sup>2</sup> and XU Huiyun<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Zhuo<sup>1</sup>,WU Yulie<sup>1</sup>,DAI Yifan<sup>1</sup>,LI Shengyi<sup>1</sup>,LU Defeng<sup>2</sup> and XU Huiyun<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200902023]]></guid><cfi:id>149</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Fault Detection Approach Based on Sliding Mode Observers]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200902024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to achieve an optimal trade-off between the robustness against unknown inputs and the fault detectability, an observer-based residue generation and fault detection method applying sliding mode observer is presented in this paper. Taking advantage of the essential feature of sliding mode variable structure technology, being completely insensitive to unknown input disturbances, the generated residue of the designed fault detection system is not affected by the unknown input, but still keeps high sensitivity to the fault signal. Simulation results show the effectiveness of the proposed approach.]]></description>
<pubDate>2013/1/31 4:04:33</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[HE Jing and QIU Jing]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HE Jing and QIU Jing</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200902024]]></guid><cfi:id>148</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Time-variable-stiffness in Involute Ring ToothSpherical Gear Transmission]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200902025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The stiffness coefficient on the contact point of the gear pairs is defined based on the Hertz Elastic Contact Theory, which can be used to calculate the meshing force of the gear pairs. Then, the characteristics of the working flanks of the involute ring tooth spherical gear are analyzed and the equations to calculate the master curvature radius are derived. Afterwards, the contact ratio, a key factor in the calculation of the stiffness coefficient, is studied and the method on how to find the position of inverse meshing point is given. Finally, the result of an example is presented to demonstrate the time-variable characteristic of the stiffness coefficient in spherical gears transmission.]]></description>
<pubDate>2013/1/31 4:04:33</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHANG Lijie,PAN Cunyun,LI Ting and LI Changyi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Lijie,PAN Cunyun,LI Ting and LI Changyi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200902025]]></guid><cfi:id>147</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Application of Ultrasonic Transducer Array for ObstacleDetection Technology in  Unmanned Automobile]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200902026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[An ultrasonic obstacle detection system for mounting on the front bumper of an automobile was designed. Using an omnibus ultrasonic transducer array and ultrasonic pulse coding techniques, an algorithm for collision identification was formulated based on a synthetic aperture to discriminate between echoes constituting real threats and those that do not. Theoretical calculation and test results show that the detectable diameter of flat boards is 15mm, and the active range is between 0.2～25m. Furthermore, the multiple obstacles in front of the automobile can be located simultaneously.]]></description>
<pubDate>2013/1/31 4:04:34</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[PAN Zhongming and HE Hangen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>PAN Zhongming and HE Hangen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200902026]]></guid><cfi:id>146</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Kinematics Modeling and Simulation of PectoralLocomotion in Batoid Fish]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200901021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Due to the difficulty of dynamics modeling in fish surrounding by the fluid, little progress has been made in the design of the current pectoral locomotion. With the rapid development of the high performance computers and numerical methods, finite element modeling applied to explore the hydrodynamics of the fish has become a hot topic recently. The kinematics modeling is usually the first step in sovling the problem. Therefore, the kinematics modeling of pectoral locomotion in fish is proposed. The pectoral locomotion is simulated with the physical character and kinematic parameter, and the kinematic formula of the pectoral locomotion in batoid fish is simplified. Along with the boundary condition of the above kinematic formula, the finite element modeling in Cownose Ray is finally simulated in order to study the kinematics. The simulation modeling, compared with the observation results, is proved to be valid.]]></description>
<pubDate>2012/11/8 3:52:59</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[YANG Shaobo,HAN Xiaoyun and QIU Jing]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YANG Shaobo,HAN Xiaoyun and QIU Jing</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200901021]]></guid><cfi:id>145</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis and Composition of Lunar RoverLocomotion Mechanism]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200901022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Under the background of creative research of six wheeled lunar exploration robot, and based on the analyses of the locomotion mechanisms of foreign space exploring robots, one hundred and twenty five kinds of creative schemes are proposed by mechanism creation and composition. ADAMS12.0 and Matlab6.5 are used to evaluate and optimize the mechanical and control system of lunar exploration rover at the levels of scheme creation, scheme composition and scheme optimum. Several optimized schemes and their parameters are obtained. Finally, an optimized scheme is chosen to produce a physical lunar rover with good performance.]]></description>
<pubDate>2012/11/8 3:52:59</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LUO Zirong,SHANG Jianzhong and ZHANG Zhixiong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LUO Zirong,SHANG Jianzhong and ZHANG Zhixiong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200901022]]></guid><cfi:id>144</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Numerical Study of Flow Field around an Amphibious Vehicle and Its Improvement in Shape]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200901023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Numerical simulation of an amphibious vehicle's ambient flow field which accounts free surface effort is made by using RNG-turbulence model, volume of fluid (VOF) model and Pressure Implicit with Splitting of Operators (PISO) method based on multi-block hybrid meshes. The computed total resistance less than 9% difference from corresponding experimental data, the agreement is good. Then primary research has been done on optimizing the geometrical characteristics of the amphibious vehicle which influence the hydrodynamic characteristics, including the cavity of the wheel, cut angle in the bodywork, the state of the wheel and the leading board in foreside. The computational results show that the hydrodynamic characteristics of the vehicle which has been improved is better than that of the original, which diminishes the total resistance 69.2% at the speed of 10km/h.]]></description>
<pubDate>2012/11/8 3:52:59</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[GAO Fudong,JIANG Lehua and PAN Cunyun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GAO Fudong,JIANG Lehua and PAN Cunyun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/200901023]]></guid><cfi:id>143</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Modeling and Dynamic Characteristics Analysis of the Valve-controlled Hydraulic Swaying Cylinder in Bionic Underwater Thruster]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201006021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The bionic underwater thruster imitating fish's undulating motion can adapt its kinematic parameters to the changing of the flux and valve signal within its hydraulic system, so that it can generate a bionic motion smoothly, fluently and continually. In the paper, flux equations of the rotatable direction valve was built, as well as the dynamic model of the valve-controlled hydraulic swaying cylinder, with which the transmission function and Bode chart were produced. Some analysis were carried out on the valve-controlled hydraulic swaying cylinder, such as the stability, the dynamic rigidity of its position, and the dynamic response velocity. The results show that the valve-controlled hydraulic swaying cylinder is a stable system, and the response speed can be optimized by adjusting its structure parameters. However, its position rigidity can be affected by the frequency of disturbing load.]]></description>
<pubDate>2012/8/28 16:33:33</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[XU Haijun,PAN Cunyun,XIE Haibin and ZHANG Daibing]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Haijun,PAN Cunyun,XIE Haibin and ZHANG Daibing</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201006021]]></guid><cfi:id>142</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on Accelerated Life Test for Rolling Element Bearings]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201006022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to obtain valid and comparable data from ALT for rolling element bearings, almost all problems which may appear in the process of ALT for rolling element bearings were investigated comprehensively. Then an orbicular method of ALT for rolling element bearing was proposed based on the existent standardizations of ALT for rolling element bearings and experience accumulated in the process of actual design and implementation. The method has complemented such omissions as pro-experiment checking, uniformity verification and signal processing which the existent standardizations and traditional life test schemes have not considered, and then formed an integral solving scheme of ALT for rolling element bearings. This scheme can be used as a guide for the design and application of ALT for rolling element bearings.]]></description>
<pubDate>2012/8/28 16:33:33</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[XU Dong<sup>1</sup>,XU Yongcheng<sup>1</sup>,CHEN Xun<sup>1</sup>,LI Xinglin<sup>2</sup> and YANG Yongmin<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Dong<sup>1</sup>,XU Yongcheng<sup>1</sup>,CHEN Xun<sup>1</sup>,LI Xinglin<sup>2</sup> and YANG Yongmin<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201006022]]></guid><cfi:id>141</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Feature Extraction and Evaluation Method for Planetary Gear Sets Based on Physical Model]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201006023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Feature extraction and evaluation is the basis of detection and prognosis. Aiming at tooth breakage in 2K-H planetary gear sets, damage model of planetary gear sets was developed. After the analysis of simulation signals, features based on sidebands around dominant frequency, wavelet transform and EMD were presented and valuated with two samples consistency check. Then the features extracted in the above were verified by simulation signal and test data. Validation results show that the features are promising and the feature based on sideband around dominant frequency is the best one to detect damage for 2K-H planetary gear sets.]]></description>
<pubDate>2012/8/28 16:33:33</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[CHENG Zhe,HU Niaoqing and GAO Jingwei]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHENG Zhe,HU Niaoqing and GAO Jingwei</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201006023]]></guid><cfi:id>140</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Space Manipulators Path Planning Based on Wavelet Collocation]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201006024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A novel numeric method for the planar space manipulators joint trajectory optimization problem was proposed based on the wavelet collocation. Based on the interval spline wavelet according with its derivation algorithms, the approach expanded the state and control variables via cubic spline wavelet decomposition, and then the trajectory optimization problem was translated to nonlinear programming problem with wavelet coefficient being parameters. The wavelet advantageous properties of compact representation could inherently make it efficiently and accurately capture the discontinuities. The novel approach was demonstrated by a typical space manipulators joint trajectory optimization problem, and the optimal results show that out approach is efficient and accurate.]]></description>
<pubDate>2012/8/28 0:00:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LIU Zeming,ZHANG Qingbin,FENG Zhiwei and YANG Tao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Zeming,ZHANG Qingbin,FENG Zhiwei and YANG Tao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201006024]]></guid><cfi:id>139</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Modal Analysis of the Laser Gyro Damping System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201006025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The use of damping system can significantly reduce the shock and vibration experienced by inertial measurement unit (IMU), and improve the measurement accuracy and the final navigation result. Firstly, modal analysis of IMU damping system was studied using finite element software Patran/Marc and the damping system main modal frequencies and shapes were obtained. Secondly, the influence on the modal analysis imposed by three key factors, such as temperature, axes-compression and radial-compression of damping rubber module, were analyzed with the simulation method. Then an optimized design of an IMU damping system was presented. The results show that the parameters in the damping system can be adjusted by changing the structure parameters, and the application demand of dither laser gyro INS are satisfied.]]></description>
<pubDate>2012/8/28 16:33:33</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[TUO Zhouhui,LI Ruhua and JIANG Mingming]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>TUO Zhouhui,LI Ruhua and JIANG Mingming</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201006025]]></guid><cfi:id>138</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The Asynchronous Multi-user Detector Based on Fast IndependentComponent Analysis]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201006026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[With a deep analysis of the signal characteristics of CDMA receiver on unideal power control instance, the current research deduced the receiving signal model of multi-cell. Furthermore, the research presented the asynchronous multi-user detection method based on FastICA, which is naturally near-far and multiple-access interference resistant. The simulation results show that: this method has less iterative time, small computational complexity and good performance of multi-user detection, which can enhance the capability of multi-user receiver and is very suitable for asynchronous multi-user detection on unideal power control.]]></description>
<pubDate>2012/8/28 16:33:33</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[DONG Zhi,HUANG Zhiping,TANG Guilin,LIU Chunwu and ZHANG Yimeng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>DONG Zhi,HUANG Zhiping,TANG Guilin,LIU Chunwu and ZHANG Yimeng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201006026]]></guid><cfi:id>137</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A Method to Eliminate the Influence on Phase Change PointsCaused by the End Effect of the Linear PM BLDC Motor]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201004023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The linear PM BLDC motor(LPMBLDCM) used in an electromagnetic launcher has a short broken permanent magnet(PM) mover whose end magnetic field is deformed. When hall cells are used in detecting magnetic induction and helping realize phase change, the phase change points(PCPs) will be shifted by this type of end effect. The phase change principle of the LPMBLDCM was analyzed and how the short broken PM mover shifts the PCPs was presented. It was concluded that this type of end effect is mainly affected by the pole-arc factor of the PM poles. An asymmetric hysteresis comparator, as well as a common single threshold comparator, was used to reshape the output of hall cells to eliminate the influence caused by the end effect. Experiment results of a prototype motor prove that the common single threshold comparator method is feasible.]]></description>
<pubDate>2012/9/6 8:52:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHAO Hongtao and WU Jun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHAO Hongtao and WU Jun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201004023]]></guid><cfi:id>136</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Hydrostatic Pressure Performance of Spherical-cymbal Transducers]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201003024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The hydrostatic pressure tolerance of spherical-cymbal transducer was investigated. Theoretical Von Mises stress analysis was carried out using finite element method. Effects of cavity geometry and material selection on limits pressure were evaluated. It shows that cavity depth, end-cap thickness and end-cap materials have strong effects on pressure tolerance of spherical-cymbal transducers. The comparison analysis indicates that the pressure tolerance of spherical-cymbal transducers with reference dimensions is higher than that of traditional cymbal transducers.]]></description>
<pubDate>2012/9/6 8:52:15</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WU Shilin,ZHANG Qi and HUANG Zhiping]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WU Shilin,ZHANG Qi and HUANG Zhiping</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201003024]]></guid><cfi:id>135</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Development of an Electromagnetic Clutch for In-pipe Robots]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201003025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to improve the security in pipes inspection for in-pipe robots, the current study developed an electromagnetic clutch, which was aimed to insure the in-pipe robots quitting from pipes where they worked in any conditions. The specific size that is 42mm in diameter and 220mm in length was designed for using in pipes. With this contact structure, it still can transfer a relative large torque and hold a 10mm effective distance. After the structure and work principle of the electromagnetic clutch were introduced, the magnetic circuit was analyzed, and then the heat of coils was calculated. The relationship between the attraction and the air distance was worked out based on the Langrage-Maxwell Equations. To testify the correctness of the theory results obtained above, some simulations were made. The data from the simulation also optimized the length of the stopper. Base on the theory result, a prototype was designed and some related experiments were made.]]></description>
<pubDate>2012/9/6 8:52:16</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[QIAO Jinwei,SHANG Jianzhong,CHEN Xun and LUO Zirong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>QIAO Jinwei,SHANG Jianzhong,CHEN Xun and LUO Zirong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201003025]]></guid><cfi:id>134</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Novelty Detection in Turbopump Condition Monitoring and Sensor Fault Recognition]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201002022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to monitor the condition of a liquid rocket engine turbopump in the case of lacking fault samples and prior knowledge about fault modes, and to eliminate the false alarms caused by sensor faults, a novelty detection method based on one-class support vector machine (OCSVM) is introduced. An OCSVM is trained on the basis of normal samples, and is used as turbopump condition monitor. Another OCSVM is trained on the basis of sensor fault samples and is used as sensor fault detector. Turbopump condition monitor detects whether novel events may occur, while sensor fault detector identifies whether novel events detected are caused by sensor faults. The validity of this turbopump condition monitoring and sensor fault recognition method is verified with historical test data.]]></description>
<pubDate>2012/9/19 9:01:23</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[HU Lei,HU Niaoqing,QIN Guojun and XIA Lurui]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HU Lei,HU Niaoqing,QIN Guojun and XIA Lurui</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201002022]]></guid><cfi:id>133</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Figure Error Compensation of Freeform Surface Turning Based onZernike Polynomial Fitting]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201002025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Slow Tool Servo diamond turning is capable of effectively generating freeform optical surfaces or rotationally non-symmetric surfaces. However, many error sources, such as geometric and thermal errors of machine tool, and the forced vibration, dominate machining accuracy. In order to enhance fabricate accuracy, machining error compensatory approach was studied. Zernike polynomials are powerful in analyzing the relationship between the surface figure and the optical performance. So machining error was analyzed by Zernike polynomial fitting procedure, and the error compensation algorithm based on tool path correction was constructed. Experiments show that the slow tool servo diamond turning method can generate freeform optical surface, while the compensation method can obviously improve the machining accuracy.]]></description>
<pubDate>2012/9/19 9:01:24</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[GUAN Chaoliang,WANG Jianmin,DAI Yifan and YIN Ziqiang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GUAN Chaoliang,WANG Jianmin,DAI Yifan and YIN Ziqiang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201002025]]></guid><cfi:id>132</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Research on Simulating Seafloor Reverberation in theCase of Monostatic]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201002026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to simulate seafloor reverberation time series in the case of monostatic, the mixed model method is presented, using the           point-scatterer model method and the patch-scatterer model method alternately. This method can not only overcome computational errors caused by the Gaussian distribution assumption in the patch-scatterer model method, but also decrease computational complexities of the point-scatterer model method. In order to simulate narrowband reverberation time series easily, the simulation method designed based on simulating reverberation complex envelop, which is feasible for any sampling frequency. Finally, the validity of the simulation method is verified by the simulation test.]]></description>
<pubDate>2012/9/19 9:01:24</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[GUO Xiye,SU Shaojing,WANG Yueke and CHEN Jianyun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GUO Xiye,SU Shaojing,WANG Yueke and CHEN Jianyun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201002026]]></guid><cfi:id>131</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis on Driving Characteristics of a Novel Micro In-pipe Robot]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201001029]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A novel micro in-pipe robot, which possesses the advantages of big driving force, fast and long-distance moving ability, is developed. The robot creeps bidirectionally and is driven by motors. It consists of self regulating mechanism, flexible holding mechanism, flexible shaft driving mechanism and unloading mechanism, which can adapt itself to micro pipelines with diameters ranging from 15 to 20mm. Based on the robot's operating principle and mechanism structure, dynamic characteristics of each mechanism are analyzed. The virtual simulation and prototype experiment results demonstrate that the robot can pass the elbows whose radius of curvature is not less than 80mm, move bidirectionally with a speed of 8-10mm/s, climb the oblique pipes angled 0-90°, and carry a load of at least 10N while the ratio of load to deadload is up to 6.67∶1.]]></description>
<pubDate>2012/9/19 9:01:37</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[XU Congqi,XIE Xuhui and DAI Yifan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Congqi,XIE Xuhui and DAI Yifan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201001029]]></guid><cfi:id>130</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Kinematics of the Satellite Antenna Positioning Mechanism Based on Spherical Gears in Star Internal Communication]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201106026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A satellite antenna positioning mechanism based on spherical gear (PMSG) was presented, and its kinematics character was also researched. The kinematics model of PMSG itself and a satellite were established separately, and the PMSG kinematics model was established based on the kinematics models. Considering the characters of intersatellite communication, the kinematics characters of two middle orbit satellites were simulated and researched for example. Results of the simulation verified the theory model established above, and the direction rule and motors movement rule were acquired, which were the theory basis in intersatellite communication. Conclusions acquired can be the basis of the engineering applies of PMSG, and it can be beneficial to the other correlative applications.]]></description>
<pubDate>2012/9/12 11:15:11</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LI Qiang,PAN Cunyun,XU Xiaojun,XU Haijun and Guo Kai]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Qiang,PAN Cunyun,XU Xiaojun,XU Haijun and Guo Kai</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201106026]]></guid><cfi:id>129</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Optical Waveguide Microstructure Mould Made by Fly-cutting Technique]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201105011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The fly-cutting technique has wide application in optical microstructure manufacture. A unique method is put forward to achieve fast and high quality optical waveguide microstructure mould manufacture with fly-cutting technique after an analysis of the present complicated process technique. Fly-cutting orthogonal test was conducted to get the optimal process parameters for machining the waveguide mould. It is found that the microstructure surface roughness is sensitive to the cut depth first, the next two are the spindle speed and the feed speed. The optimal process parameters involve such figures as cut depth of 25μm, feed speed of 20mm/min and spindle speed of 800r/min through the experiment analysis considering the stability of the fly-cutting system and machining efficiency. The optical waveguide mold with microstructure surface root-mean-square roughness of 17.1nm was obtained through the optimal process parameters.]]></description>
<pubDate>2012/8/28 11:51:54</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[PENG Wenqiang,WU Yulie,Li Shengyi and LIU Yong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>PENG Wenqiang,WU Yulie,Li Shengyi and LIU Yong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201105011]]></guid><cfi:id>128</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Modeling and Analysis of Equipment's Residual Life Considering the Condition of Damaging Measuring]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201105012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In the case of equipments’ performance degradation which partially results from measuring, the model which is only based on the degradation data itself cannot reflect the true degradation process, and it is unable to forecast and evaluate effectively, especially when the degradation quantity caused by measures cannot be ignored. In order to solve this problem, firstly, the equipment's degradation process model which contains the damaging quantity induced by measuring was established on the basis of Wiener process; then the method of parameters estimation and real-time updating method for  equipment's residual life based on Bayesian theory were presented. Finally, a simulation example was presented to testify the significance of this research and the validity of models.]]></description>
<pubDate>2012/8/28 11:51:54</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[Wang Xiaolin,Guo Bo,Cheng Zhijun and Qi Jianjun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>Wang Xiaolin,Guo Bo,Cheng Zhijun and Qi Jianjun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201105012]]></guid><cfi:id>127</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Axis-motion Formulas of Free-form Machine Tool Solved by Optimization Algorithm and It's Influence on Tooth-surface Error]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201105013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[According to the principle of the transformation from the summary of traditional-cradle machine tool to the one of free-form machine tool-assuring the orientation between the cutter axis and the work-piece axis during the process, axis-motion formulas in the form of polynomial for free-form machine tool were fitted with the least square method. The procedure was accomplished via exemplifying No.116 gear generator for traditional-cradle machine tool, and deducing the coordinate transformation matrixes under these two kinds of machine tool. Correctness of the procedure is validated by an example, which shows that the coordinate transformation matrixes under these two kinds of machine tool coincide, the distance between the tooth surface virtually manufactured by axis-motion formulas in the software of CATIA and the theoretical points lies in the range from 0mm to 0.009mm, and the distance can be controlled to a smaller one. The influence of axis-motion error on tooth-surface error was investigated, and axis B was found to be the one influencing tooth surface most significantly. This partially provides theoretical basis for improving the manufacturing accuracy of free-form machine tool.]]></description>
<pubDate>2012/8/28 11:51:54</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[TANG Jinyuan,WANG Zhiquan and LI Youyuan]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>TANG Jinyuan,WANG Zhiquan and LI Youyuan</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201105013]]></guid><cfi:id>126</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of Eddy Current Force in Electromagnetic  Aircraft Launch System]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201105014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Permanent magnet linear motors are fit for the application of quick acceleration and braking within short distance in electromagnetic aircraft launch systems, but eddy current is likely to be induced by its quick moving. In the acceleration stage, the resistance force deduced by the eddy current can reduce the launch ability of system. On the other side, the force deduced by the eddy current can improve the braking ability in brake stage. This study analyzed the eddy current force in a kind of linear motor with open slot, concentrated winding, and moving permanent magnet. In the acceleration area, the eddy current resistance force deduced by the aluminum sleeve of the permanent magnet mover was analyzed. A method to weaken this resistance force by half open slot and hollow sleeve structure was proposed, and the feasibility was proven. In brake area, a solid stator structure was proposed to take the place of a laminated stator structure, which can increase the eddy current braking force and shorten the braking time. A simplified function has also been formulated for the eddy loss. Simulation results indicate that a hybrid braking technique combining eddy current braking and plug braking can improve the braking ability efficiently.]]></description>
<pubDate>2012/8/28 11:51:54</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WU Jun,ZHAO Hongtao and LUO Honghao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WU Jun,ZHAO Hongtao and LUO Honghao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201105014]]></guid><cfi:id>125</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Optimized Latin Hypercube Sampling Method and Its Application]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201105015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Computer simulation is effective for the optimization of complex system. However, it is time-consuming. Therefore, the number of simulations must be strictly confined. To generate a good simulation plan, an optimized Latin hypercube sampling method is put forward. The method can not only reduce the number of simulations, but also ensure the generated plan of good orthogonality and proportional spacing. Cholesky decomposition was borrowed to generate initial solution, and simulated annealing algorithm was used to get optimized array. Also a dynamic weight parameter was defined to balance different optimization objectives. Finally, an example was constructed. The result shows that the optimized Latin hypercube sampling method can generate a sound simulation plan with less simulation.]]></description>
<pubDate>2012/8/28 11:51:54</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LIU Xiaolu,CHEN Yingwu,JING Xianrong and CHEN Yingguo]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Xiaolu,CHEN Yingwu,JING Xianrong and CHEN Yingguo</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201105015]]></guid><cfi:id>124</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Design of Fault Tolerant Permanent Magnet Motor in Direct Drive Electromechanical Actuator]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201104026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The design of fault tolerant motor was studied in order to minimize the volume and weight of direct drive electromechanical actuator, and to improve the fault tolerant and reliability. The design requirements of fault tolerant motor were analyzed, and a three-phase twenty-four-slot twenty-pole surface permanent magnet synchronous motor was designed to meet the requirements. The parameters of the motor were optimized. The finite element model of the motor was established to simulate a single phase short circuit or open circuit fault. The simulation results show that the motor has a perfect property in the magnetic isolation and fault tolerant, and can meet the fault tolerant requirements of direct drive electromechanical actuator.]]></description>
<pubDate>2012/8/28 10:29:48</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LU Xiaohui<sup>1</sup>,LIANG Jiahong<sup>1</sup> and LIAO Ying<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LU Xiaohui<sup>1</sup>,LIANG Jiahong<sup>1</sup> and LIAO Ying<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201104026]]></guid><cfi:id>123</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Collaborative Design Based on Feature-Adding in VPDM]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201104027]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Collaborative Design has currently become one of key technologies to solve complex product design problems. Based on new problems of existing collaborative design, the study puts forward a method of building VPDM, and uses an exchanging method of feature-adding data to resolve problems of heterogeneous PDM and CAD systems among enterprises. Firstly, a definition of VPDM was presented, and the basic principle of VPDM-based collaborative design was introduced. Secondly, the framework of VPDM-based collaborative design was proposed and each components of VPDM were analyzed. Then, the operation model and the unified feature model represented by Express-G were built and mapped into database. Finally, the feature-adding collaborative design sequence diagram was described in VPDM environment. By using the above method, the prototype system developed in the study enables the collaborative design in two kinds of CAD and PDM software in principle.]]></description>
<pubDate>2012/8/28 10:29:48</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LIANG Keshan,FAN Dapeng,SHANG Jianzhong,TANG Li and CAO Yujun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIANG Keshan,FAN Dapeng,SHANG Jianzhong,TANG Li and CAO Yujun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201104027]]></guid><cfi:id>122</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Residual Life Forecasting of Metallized Film CapacitorBased on Wiener Process]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201104028]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The metallized film capacitor is one of the most important components of the inertial confinement fusion (ICF) facility. The effective residual life forecasting of capacitors affects the reliability of the whole facility. In order to forecast the residual life of a single capacitor effectively, a method which fuses prior degradation information and its own degradation data was presented. Firstly, the capacitor's degradation process was modeled with Wiener process, whose parameter's prior distribution was established on the basis of prior degradation information. Then the real-time residual life forecasting of the capacitor was proposed by Bayes method. Finally, the significance and practical value of this research was verified by an example.]]></description>
<pubDate>2012/8/28 10:29:48</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WANG Xiaolin,CHENG Zhijun and GUO Bo]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Xiaolin,CHENG Zhijun and GUO Bo</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201104028]]></guid><cfi:id>121</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Instantaneous Characteristics Analysis Method for ComplicatedSignals Based on Improved Empirical AM-FM Demodulation]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201102025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Some limitations of the Hilbert transform (HT) for computing instantaneous characteristics of complicated mono-component signals were analyzed. As an enhancement of the HT, an algorithm named empirical AM-FM (amplitude and frequency modulation) demodulation was investigated and then improved. Firstly, the weighted smoothing phase-difference method was applied to this demodulation algorithm to increase the precision of instantaneous frequency for noisy signals. Secondly, by combining the Empirical Mode Decomposition (EMD) and the improved empirical AM-FM demodulation algorithm, a method suitable for instantaneous characteristics extraction of complicated multi-component signals was proposed. The validity of the improvements was confirmed by numerical simulations and experimental signals.]]></description>
<pubDate>2012/8/28 10:30:14</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[HU Haifeng,HU Niaoqing and QIN Guojun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HU Haifeng,HU Niaoqing and QIN Guojun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201102025]]></guid><cfi:id>120</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Missile Testability Requirement Analysis and Index Determination Oriented to Mission]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201102026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In view of the lacking of theory and method in determining missile system level testability indices, this research presents a testability indices determining method oriented to mission requirements. The missile mission is divided into four phases, such as storing, combat preparation, disposition and launch. Then the test requirement of each phase was proposed. Based on the performance requirements of store availability, combat preparation mission success rate, disposed combat readiness rate and launch mission success rate, some testability requirement models were built. The relationship between the performance requirements and testability parameters were given, and the testability parameters which were the key factors on the performance were selected. It defines an aggregative index to evaluate the missile mission performance, and then modifies the mission phases performance requirements to unify the testability indices which may vary in deferent missions. The credible testability indices are gained synthetically.]]></description>
<pubDate>2012/8/28 10:30:14</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[SU Yongding,QIU Jing and YANG Peng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SU Yongding,QIU Jing and YANG Peng</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201102026]]></guid><cfi:id>119</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Study on Simulation Based Optimal Design Method for AcceleratedTesting with Competing Failure Modes]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201102027]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The technology of accelerated testing with competing failure is the foundation of application extending from products with simple structure to products with complex structure. Designing optimal test plans, which obtains better result with lower cost, is one of the main research points in the technology. Traditional analytical optimization has some shortcomings, such as complexity of deduce process. To overcome these shortcomings, this study presents a new method of Monte Carlo simulation based optimal designs for accelerated testing with competing failure. When the candidate plans are too many, curve fitting can be introduced to decrease the amount of calculation by reducing the number of test plans for simulation. Two cases of simulation based optimal designs are demonstrated by direct and indirect optimization respectively, which shows that the proposed method is suitable for application. Results of sensitivity analysis show that this method is robust.]]></description>
<pubDate>2012/8/28 10:30:14</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[TAN Yuanyuan,ZHANG Chunhua,WANG Yashun and CHEN Xun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>TAN Yuanyuan,ZHANG Chunhua,WANG Yashun and CHEN Xun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201102027]]></guid><cfi:id>118</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Impact of STI Depth on Charge Sharing in 90nm CMOS Technology]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201102028]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The dependence of various STI depths on charge sharing in 90nm dual well CMOS technology was investigated. TCAD simulation results show that increasing STI can restrain charge sharing of NMOS effectively, and 550nm is the effective depth for the prevention of charge diffusion, beyond which the collected charge almost keeps constant; for PMOS, charge sharing decreases linearly with the increment of STI depth. This conclusion is useful for irradiation-hardness.]]></description>
<pubDate>2012/8/28 10:30:14</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LIU Hengzhu,LIU Fanyu,LIU Biwei and LIANG Bin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Hengzhu,LIU Fanyu,LIU Biwei and LIANG Bin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201102028]]></guid><cfi:id>117</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Ion Beam Figuring for Rectangular Off-axis Aspheric Mirrors]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201101021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A simple method of ion beam figuring was successfully employed for processing rectangular off-axis aspheric mirror. Based on the material removal mechanism, the normal removal characteristic was analyzed. Beam  diameter, peak removal rate and volume removal rate are the three factors to evaluate the robustness of removal function with respect to little disturbance of incidence angle. According to the results of analyses and experiments, the method  of processing rectangular off-axis aspheric mirror by ion beam figuring was appropriately simplified. To validate the feasibility of this method, an off-axis  aspheric ellipsoidal mirror was processed in our IBF system. With three iterations of 200 minutes, the surface error was reduced from 0.294λ RMS to 0.05λ RMS  and the total convergence ratio was 10. The experimental results indicate that  IBF has inimitable material removal characteristics, can effectively improve surface precision and realize the rapid processing of ultra-precision rectangular  off-axis aspheric mirror.]]></description>
<pubDate>2012/8/29 10:50:39</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LIAO Wenlin,DAI Yifan,ZHOU Lin,WANG Jianmin,YUAN Zheng and XIE Xuhui]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIAO Wenlin,DAI Yifan,ZHOU Lin,WANG Jianmin,YUAN Zheng and XIE Xuhui</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201101021]]></guid><cfi:id>116</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Oil leakage detection based on the artificial olfactory system]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201206031]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Oil leakage from cracks is a kind of common fault in mechatronics systems. Responses of artificial olfactory system to the volatile organic compounds (VOCs) emitted by leakage oil can be used for leak detection, which is a novel non-destructive method for fault diagnosis. An artificial olfactory system was applied to detect three different kinds of leakage oil such as diesel oil, machine oil and gear oil. The collected dataset was arranged in a-three dimensionality matrix (sample×time×sensor). Three methods as two-way principal component analysis (PCA), three-way unfolding PCA and parallel factor analysis (PARAFAC) were adopted to distinguish the VOCs. The results showed that PARAFAC was superior to the other two methods because PARAFAC took into account the true three-dimensionality structure of the dataset. The multivariate calibration method, principal component regression (PCR) was applied in the prediction of different concentrations of diesel oil. The results indicate that it is possible to use an artificial olfactory system to give an alarm by setting a threshold. ]]></description>
<pubDate>2013/1/11 4:19:31</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHAGN Wenna,QIN Guojun,HU Niaoqing and ZHAGN Ji]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHAGN Wenna,QIN Guojun,HU Niaoqing and ZHAGN Ji</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201206031]]></guid><cfi:id>115</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Granulating process analysis of products based on 
the theory of fuzzy quotient space]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201206032]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Module identification plays an important role in modular design and mass customization. In order to further extend the quantitative methodology for product modularization, an approach to product granulation based on the theory of fuzzy quotient space was proposed. The traditional product modularization based on the relativity analysis was translated into the product granulation by introducing the granular computing method, and the product granulation was analyzed by the theory of fuzzy quotient space. The product granular space was established based on the normalized distance and the integrated fuzzy similarity relation, and the optimal granular layer was obtained using a two-stage optimization algorithm. Then the optimal modularization scheme was achieved. A case of the telescopic shuttle mechanism of automatic storage/retrieval machine was studied to illustrate the validity of the proposed method. This approach offers a new way of numerical analysis and evaluation for module identifying and optimizing, and the application result shows that the proposed method is feasible and rational, which can guide the product modularization process effectively.]]></description>
<pubDate>2013/1/11 4:19:31</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHANG Meng,LI Guoxi,GONG Jingzhong and WU Baozhong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Meng,LI Guoxi,GONG Jingzhong and WU Baozhong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201206032]]></guid><cfi:id>114</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Freeform surface STS turning and tool geometry 
parameters determination method]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201205020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Optical components with freeform surface can achieve excellent performance. It is used more and more widely in the modern optical system. Slow Tool Servo (STS) is a new technique to machining freeform surface. Due to the complexity of freeform surface and the particularity of STS, the relative position relationship between tool and work piece must be deeply researched. In this research, STS machining technique was introduced. Two tool geometry selection methods were proposed and researched on. One of the two methods was based on section curves and the other was based on whole surface using NURBS.]]></description>
<pubDate>2012/11/5 8:48:03</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[GUAN Chaoliang<sup>1</sup>,CHEN Yansheng<sup>2</sup> and PENG Wenqiang<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GUAN Chaoliang<sup>1</sup>,CHEN Yansheng<sup>2</sup> and PENG Wenqiang<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201205020]]></guid><cfi:id>113</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The calculation of friction power loss for spiral bevel gears]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201205022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on the principle of gear engaging and tribology theory, by simplifying spiral bevel gear to spur gear, and by considering the impact of gear contact ratio and time-variant factors including meshpoint relative sliding velocity, normal load, and friction coefficient, the computing model of friction power loss for spiral bevel gear was established. According to the model, the friction power loss was calculated and analyzed by taking the spiral bevel gear of a helicopter tail reducer as research object. The results show that the computing model is reasonable, simple and reliable, and has a reference value to calculate the friction power loss for spiral bevel gears.]]></description>
<pubDate>2012/11/5 8:48:03</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[YUAN Jiehong and LIN Zejin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YUAN Jiehong and LIN Zejin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201205022]]></guid><cfi:id>112</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Preferred selection method for maintainability design schemes based on integrative evaluation decision-making of design factors]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201203012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at evaluation and selection of maintainability design schemes, a new preferred selection method based on integrative evaluation of design factors was proposed. Considering the uncertainty and fuzziness of design factors’ evaluation, linguistic assessment values of maintainability design factors were quantified on the basis of the set pair analysis theory, and evaluation and decision-making model was established by introducing the weighting method based on AHP into similarity scale of schemes. Finally, preferred selection for design schemes of some manned spacecraft power system was taken as an example to illustrate the application and effectiveness of this method. ]]></description>
<pubDate>2012/8/28 0:00:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LUO Xu,GE Zhexue and YANG Yongmin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LUO Xu,GE Zhexue and YANG Yongmin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201203012]]></guid><cfi:id>111</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Experimental research on surface temperature field of airplane under solar radiation]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201203017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[This paper presents an experimental method to measure surface temperature field distribution of airplane under solar radiation by airplane downsizing model, and suggests a method to realize analogue display of 3 dimensions for temperature field distribution by finite element method. This method may avoid the influence of the uncontrollable intensity of natural solar radiation and the variable ambient temperature under field measuring condition, and provide an efficient method to validate the theoretical model of surface temperature field distribution of airplane under solar radiation and to measure it by experiment. It will be beneficial to the research of infrared characteristics and calendar life for airplane.]]></description>
<pubDate>2012/8/28 10:28:45</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHANG Chunhua,ZHAO Yuan,YU Huangchao and CHEN Xun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Chunhua,ZHAO Yuan,YU Huangchao and CHEN Xun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201203017]]></guid><cfi:id>110</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analytical computation of normal and tangential forces in linear synchronous motor with air-core and Halbach permanent magnets]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201203019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[An analytical method of calculating the normal and tangential forces in linear synchronous motor with air-core and Halbach permanent magnets is developed. First, the analytical solution to the normal and tangential forces of the rotary motor with the same structure is deduced. Then, the proposed method is extended to linear motor, and the analytical method of computing the normal and tangential forces in linear synchronous motor with air-core and Halbach permanent magnets is obtained. Finally, the effectiveness of the proposed analytical method is validated by Ansoft Maxwell, which is a famous finite element analytical software. The proposed solution provides an important tool for structure design and performance analysis of linear synchronous motor with air-core and Halbach permanent magnets.]]></description>
<pubDate>2012/8/28 10:28:45</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LIU Hengkun,ZHANG Xiao and MI Zhu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Hengkun,ZHANG Xiao and MI Zhu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201203019]]></guid><cfi:id>109</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Wear-life models for self-lubricating spherical plain bearing]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201306010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Wear-life forecast of self-lubricating spherical plain bearing has very great significance to the operating security of equipment. To meet the demand of wear-life calculation and forecast of self-lubricating spherical plain bearing, the wear-life models for self-lubricating thrust spherical plain bearing and self-lubricating radial spherical plain bearing were created based on the principle of joint wear calculation method and the wear mechanism of self-lubricating radial spherical plain bearing. The models proposed integrated the wear mechanism of self- lubricating radial spherical plain bearing, the friction wear laws of materials, configuration, mating characteristic of the self-lubricating spherical plain bearing, and function requirement. Especially, the configuration parameters and function requirement were more specific in the models to different types and functions of self-lubricating spherical plain bearing. Example results and analysis on the models showed that the model can calculate the wear life accurately, and it is more theoretical and has a good applicability to the special designed and applied self-lubricating spherical plain bearing compared with the experiential calculation formulas used at present.]]></description>
<pubDate>2014/1/8 17:09:35</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHANG Xiangpo,SHANG Jianzhong,CHEN Xun,ZHANG Chunhua and WANG Yashun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Xiangpo,SHANG Jianzhong,CHEN Xun,ZHANG Chunhua and WANG Yashun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201306010]]></guid><cfi:id>108</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The causal analysis and preventive measures for the fuel-oil accessories rear cover in the aero-engine]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201306011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[For the problem of the cracks which appear in batches in the fuel-oil accessories rear cover, a new evadable measure for the crack guide and devolvement is put forward, by researching the main cause of the cracks and analyzing the extent of the damage caused by the cracks in different positions in the fuel-oil accessories rear cover for the aero-engine, The method changed the pristine support construction, so the new stress concentration point was formed and the stress amplitude in the key part of the stress concentration area was reduced, which transferred the crack faults from the unrepaired key part to the repairable non-critical part. Through computer simulation, the optimal parameters for the crack guided gap were determined, and the simulation result showed that the evadable measure for crack guide and devolvement is reasonable and practicable.]]></description>
<pubDate>2014/1/8 17:09:35</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[XU Xiaojun<sup>1</sup>,LUO Cheng<sup>1,2</sup> and FENG Yifei<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Xiaojun<sup>1</sup>,LUO Cheng<sup>1,2</sup> and FENG Yifei<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201306011]]></guid><cfi:id>107</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Parameter identification for magnetic bearing
based on online dynamic balancing]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201306012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on online dynamic balancing, a novel parameter identification method is proposed for magnetic suspending rigid rotor system. Two unbalancing masses with given magnitude and phase were added to the rotor and used as a vibration exciter. The displacement stiffness and current stiffness were identified from the unbalancing response detected by the balancing monitor. The proposed method was experimentally validated with a magnetic suspending control moment gyroscope, and the displacement stiffness and current stiffness of its magnetic bearings were obtained within a certain rotational speed interval, which demonstrates the correctness and feasibility of the method. The experimental results show that the displacement stiffness and current stiffness decrease notably with the rotational speed increased for an outer rotor magnetic bearing.]]></description>
<pubDate>2014/1/8 17:09:35</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[HOU Eryong and LIU Kun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HOU Eryong and LIU Kun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201306012]]></guid><cfi:id>106</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Transient temperature field simulation analysis of spiral bevel gear 
transmission system by simulink in the condition of loss of lubrication]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201305010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[According to the heat transfer theory and the thermal network method, and taking the spiral bevel gear transmission system of a helicopter tail reducer as research object, the calculation model of the temperature field Simulink simulation was established. Based on the model, the steady-state temperature field of the transmission system was calculated in the normal lubrication. Taking it as the initial condition, the transient temperature field of the transmission system was calculated and analyzed in the condition of loss of lubrication. It provides the theoretical foundation of predicting the survivability of the gear transmission system in the condition of loss of lubrication.]]></description>
<pubDate>2013/11/6 15:57:50</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[YUAN Jiehong<sup>1</sup>,LIN Zejin<sup>1,2</sup> and YAN Xijie<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YUAN Jiehong<sup>1</sup>,LIN Zejin<sup>1,2</sup> and YAN Xijie<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201305010]]></guid><cfi:id>105</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A track geometry measurement system for low speed maglev]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201304010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The quality of F track has a critical influence on the safety and comfort of low speed maglev transportation. Therefore, track geometry must be measured termly. And Appropriate maintenance of F track will be carried out according as the measurement results to keep track all right. In order to maintain maglev guideway efficiently, FMS01 is a F track geometry measurement system made by National Univ. of Defense Technology and the first one in China, and it can be operated to measure track geometry fast and accurately, including vertical deviation, lateral deviation, track gauge and level difference when maglev train travel at 20-100km/h. Vertical and lateral deviation can be measured based on inertial principle. The measurements of the 1.5km long line in Tangshan was carried out using FMS01.The experimental results show that maximum error of vertical deviation is less than ±0.7 mm in reference to fine measurement using level gauge and maximum error of track geometries is less than ±0.2 mm in reference to the average of measurements using FMS01.]]></description>
<pubDate>2013/8/22 16:54:28</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHOU Wenwu,WU Jun,LI Zhongxiu and ZHANG Xinghua]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHOU Wenwu,WU Jun,LI Zhongxiu and ZHANG Xinghua</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201304010]]></guid><cfi:id>104</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Effect of G.C arrangement on the power absorption in 
a two-body rolling WECS]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201304011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A two-body rolling wave energy conversion system (WECS) is proposed. The system utilizes the rolling difference between the upper buoy and the lower one. On the basis of the lower buoy’s stability, the rolling of the upper buoy determines the wave energy absorption. The buoy's rolling is determined by its natural frequency, which is mainly affected by the G.C position arrangement. Therefore, numerical simulation is applied. A box-shaped buoy is selected as the upper buoy, and the system working in long crest wave with ten conditions is analyzed, in order to find out how the G.C position arrangement influences the wave energy absorption and the PTO damping selection. The results show that G.C position arrangement does affect the wave energy absorption by changing the natural frequency, and a lower G.C. position can enlarge the frequency range, and can absorb more wave energy.]]></description>
<pubDate>2013/8/22 16:54:28</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WANG Xiaoming,SHANG Jianzhong and ZHANG Zhixiong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Xiaoming,SHANG Jianzhong and ZHANG Zhixiong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201304011]]></guid><cfi:id>103</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Design and experiment of self-compensated hydrostatic precision rotary bearing]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303001]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A new type of self-compensated conical hydrostatic bearing for precision rotary table was designed, manufactured and tested. The design formulas were derived based on flow equilibrium, and the optimal stiffness was obtained both from the axial and the radial directions. The effect of manufacturing error on the performance was investigated, and the stiffness and revolution accuracy was experimentally tested. Results show that the bearing stiffness is influenced by the resistance ratio between the restricting gap, the bearing gap and the inner flow coefficient between pockets; the resistance ratio has an optimal value, and a little value of the inner flow coefficient is favorable to the stiffness; the model considering manufacturing errors can effectively predict the range of the bearing stiffness. ]]></description>
<pubDate>2013/7/4 10:40:10</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZUO Xiaobo,YIN Ziqiang,WANG Jianmin,LI Shengyi and LIU Xiaodong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZUO Xiaobo,YIN Ziqiang,WANG Jianmin,LI Shengyi and LIU Xiaodong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303001]]></guid><cfi:id>102</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The vehicle interferential magnetic field compensation method]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303002]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Getting accurate geomagnetic field measurements on the route of the vehicle is the precondition for geomagnetic navigation. The interferential magnetic field of the vehicle would distort the outputs of the magnetometer and influence the matching precision, so it must be compensated. Based on the analysis of the characteristics of the vehicle magnetic field, a method to compensate the geomagnetic magnitude, using vector measurements, is presented. A formulation was derived according to the measurement model of vectorial magnetometer, a nonlinear evaluation method was adopted to evaluate the vehicle interferential fields parameters, and then the evaluated results were used to compensate the real- time measurements. A simulation was conducted to test the effect of the method and an experiment was performed to validate its practicability. The results show that after compensating with the presented method, the measurement error of geomagnetic field magnitude is less than 20nT, indicating that the method has high compensating precision, good convenience in use, and can compensate the interferential magnetic field of the navigation vehicle effectively.]]></description>
<pubDate>2013/7/4 10:40:10</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LI Ji,ZHANG Qi,PAN Mengchun and LUO Feilu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Ji,ZHANG Qi,PAN Mengchun and LUO Feilu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303002]]></guid><cfi:id>101</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Stability and control of dynamics equilibrium for two-spacecraft 
electromagnetic formation]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303003]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Space electromagnetic formation is characterized mainly by advantages of no propellant consumption, no plume contaminations, continuous reversible and synchronous controllability, and static electromagnetic formation has a broad prospect of application in such fields as optical interferometry. The stability and control issues of dynamics equilibrium are the foundation for static electromagnetic formation. This research focused on the three equilibriums of two-spacecraft aligned with radial, along-track and normal direction, developed the 6-DOF coupled nonlinear dynamic models by the Kane method, and analyzed the open-loop stability, the coupled characteristics and the control requirements for each equilibrium respectively. Finally, an LQR feedback controller was designed and verified to stabilize the equilibriums.]]></description>
<pubDate>2013/7/4 10:40:10</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[HUANG Huan,YANG Leping,ZHU Yanwei and ZHANG Yuanwen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HUANG Huan,YANG Leping,ZHU Yanwei and ZHANG Yuanwen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303003]]></guid><cfi:id>100</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Application of the implicit LU-SGS algorithm for hypersonic flows]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303004]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Convergence rates of the original LU-SGS scheme and its modified methods were investigated and compared under hypersonic conditions, which is aimed to implement the LU-SGS algorithm efficiently for numerical simulation of complex geometries in engineering environment. Numerical results of 2D cylinder, 3D blunt cone and space shuttle show that: the viscous terms must take the implicit form for hypersonic viscous flows. the convergence rate of the BLU-SGS inner iterations is fast than that in the DP-LUR method. Jacobian matrices in the LU-SGS algorithm have a significant effect on computational work and convergence performance. for the flows without separation, fast convergence can be reached by using the exact matrix method and for the flows with large separation, numerical instability makes the exact matrix method less efficient than the diagonal method.]]></description>
<pubDate>2013/7/4 10:40:10</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[CAO Wenbin,LI Hua and DING Guohao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CAO Wenbin,LI Hua and DING Guohao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201303004]]></guid><cfi:id>99</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Robust control method of parallel wave compensation system]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201406030]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A robust control method for new type wave compensation systems that based on cable-driven parallel mechanisms were presented. The environmental forces and immeasurable parameters were separated from the dynamic equations and treated as disturbances. Then a sliding mode control law was derived using Lyapunov stability theory. For redundant mechanisms, a tension distribution algorithm based on alternating projection was proposed. When feasible solutions exist, this algorithm leads to a "safe" optimum solution that is kept away from all the boundaries of the tension constraints. Even if no feasible solution exists, a best approximate solution will be got which satisfies the tension constraints. An identification method was also proposed to enhance the practicability of the robust control method. Simulation results show that the proposed theories and methods are effective for such wave compensation systems.]]></description>
<pubDate>2015/1/22 16:38:33</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[HU Yongpan,TAO Limin,LYU Wei and JIA Jun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HU Yongpan,TAO Limin,LYU Wei and JIA Jun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201406030]]></guid><cfi:id>98</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Joint clearance effects on robot manipulators positional error]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201406032]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The effects of joint clearance on robot manipulators positional error were investigated. The kinematic model was built by using the D-H method to research the six degrees of freedom mechanical arm. The central error propagation model was established. The simulations of error distribution were conducted in MATLAB with Monee Carlo method. The distribution characteristic and probability distribution of positional error of mechanical arm's end, which is caused by the joint clearance, were obtained from the simulations at different levels of joint clearance. This research provides basis for error compensation and positional error evaluation.]]></description>
<pubDate>2015/1/22 16:38:33</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHANG Zhixiong<sup>1</sup>,JIANG Zhixin<sup>1</sup>,YANG Yongmin<sup>2</sup>,TANG Li<sup>1</sup> and YAN Chao<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Zhixiong<sup>1</sup>,JIANG Zhixin<sup>1</sup>,YANG Yongmin<sup>2</sup>,TANG Li<sup>1</sup> and YAN Chao<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201406032]]></guid><cfi:id>97</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Kineto-static analysis on the Differential Velocity Drive Mechanism of the Dual-rotor Piston Engine]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/14040015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Dual-rotor Piston Engine (DRPE) is a new type of differential rotary engine. Compared with traditional engines, DRPE has many advantages. The complex valve systems can be omitted. Its structure is more compact. Its power density is higher, and so forth. In the paper, we analyze the working characteristics of DRPE, and figure out the mechanical structure characteristics of the Differential Velocity Drive Mechanism (DVDM) of the DRPE. Define its kinetic parameters. Then establish the mathematical models for the kineto-static analysis of the DVDM by using vector mechanics methods. The mathematical models were calculated by Matlab. The mechanical characteristics of DRPE’s main components were obtained. In order to verify the rationality of the established mathematical models, multi-body dynamics simulations were done. The virtual prototype model of the DRPE-350 was established in the RecurDyn. The simulation results compared with the calculation results, the value changing rules are almost the same. The changing processes are all four cycles. Impact positions are basically the same. It shows that the established dynamic theory model conforms to the actual situation. It is reasonable and can be trusted. It can be used as the theoretical foundation for the follow-up improvements of the DRPE.]]></description>
<pubDate>2015/1/22 15:55:57</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[邹腾安,潘存云,徐小军,陈虎]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>邹腾安,潘存云,徐小军,陈虎</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/14040015]]></guid><cfi:id>96</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A reliability approach based on non-probabilistic theory 
for structures with hybrid uncertainties]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201405004]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Investigation on mixed structures with hybrid uncertainties was based on the reliability analysis of uncertain structures of the distribution parameters of input variables that acted as the interval model. Considering the available information was quite scanty, the uncertain distribution parameters were treated as the interval model. The reliability analysis model for this hybrid uncertainty was established by separating the distribution parameters from their random variables through using equivalent probability transformation method. Based on the non-probabilistic reliability theory, a high efficient solution method was proposed by successively constructing the limit state function of the proposed hybrid uncertain analytic model in two levels and combing the Kriging surrogate model. The proposed hybrid uncertain analytic model is employed to analyze aircraft structures with hybrid uncertainties, which can demonstrate the rationality of the proposed model and the efficiency and accuracy of the solution model.]]></description>
<pubDate>2014/11/25 10:16:01</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LI Guijie<sup>1，2</sup>,LYU Zhenzhou<sup>1</sup>,GE Shanzeng<sup>2</sup> and XU Jia<sup>3</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Guijie<sup>1，2</sup>,LYU Zhenzhou<sup>1</sup>,GE Shanzeng<sup>2</sup> and XU Jia<sup>3</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201405004]]></guid><cfi:id>95</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Kineto-static analysis on the differential velocity drive mechanism 
of the dual-rotor piston engine]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201405032]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Dual-rotor Piston Engine (DRPE) is a new type of differential rotary engine. Compared with traditional engines, DRPE has many advantages. The complex valve systems can be omitted. Its structure is more compact. Its power density is higher, and so forth. By analyzing the working characteristics of DRPE, the mechanical structure characteristics of the Differential Velocity Drive Mechanism (DVDM) of the DRPE were figured out. Its kinetic parameters were defined. Then the mathematical models for the kineto-static analysis of the DVDM were established by using vector mechanics methods. The mathematical models were calculated by Matlab. The mechanical characteristics of DRPE’s main components were obtained. In order to verify the rationality of the established mathematical models, the virtual prototype model of the DRPE-350 was established in the RecurDyn based on multi body dynamics simulations. Comparing the simulation results with the calculation results, the value changing rules are almost the same. The changing processes are all four cycles. Impact positions are basically the same. It shows that the established dynamic theory model conforms to the actual situation. It is reasonable and can be trusted. It can be used as the theoretical foundation for the follow-up improvements of the DRPE.]]></description>
<pubDate>2014/11/25 10:16:03</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZOU Tengan,PAN Cunyun,XU Xiaojun and CHEN Hu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZOU Tengan,PAN Cunyun,XU Xiaojun and CHEN Hu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201405032]]></guid><cfi:id>94</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Magnetic field sensors with MEMS magnetic flux concentration 
and vertical motion modulation]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201404022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[1/f noise is one of the main noise sources of giant magnetoresistance (GMR) and magnetic tunnel junction (MTJ), which can cause intrinsic detection limit at low frequency. Based on this fact, a sort of magnetic field sensor using microelectromechanical system (MEMS) flux concentrator and flux vertical motion modulation is proposed. The frequency of the measurement magnetic field was shifted from low to kHz ranges, which realized the translation of measurement magnetic field from DC to AC, thus 1/f noise of magnetoresistance element was mitigated. A prototype sensor was fabricated using multi-layered GMR element AA002, and the test was done. The results showed that the modulation efficiency achieves the levle of 19.3%, which exceeds the efficiency of most existing sensors with other modulation schemes, and the low frequency magnetic detection ability is improved to 120pT/√Hz, which is enhanced by 40 times compared with that of the GMR element AA002.]]></description>
<pubDate>2014/9/4 17:19:45</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[TIAN Wugang,HU Jiafei,PAN Mengchun,ZHAO Jianqiang and HU Jinghua]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>TIAN Wugang,HU Jiafei,PAN Mengchun,ZHAO Jianqiang and HU Jinghua</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201404022]]></guid><cfi:id>93</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Simulation of dilute pneumatic conveying with bends by CFD-DEM]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201404023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[CFD-DEM model was used to simulate the gas-solid flow in dilute pneumatic conveying with bends. In CFD-DEM, the discrete particle phase was obtained by Discrete Element Method (DEM), and the flow of continuum gas phase was determined by Computational Fluid Dynamics (CFD). In order to consume less simulation time, the effect of the particle solid fraction on the gas phase was not taken into account. The results showed the particle rope formation in the bend and its dispersion in the vertical pipe, and obtained the particle-particle and particle-wall collision information. Comparison of the collision information in the bend, the collision and abrasion seemed more intensive at the bottom of the bend. It was also found that the geometry and parameters have different magnitude effects on the gas-solid flow and collisions in the pipe. The gas velocity was considered to be limited influence on the rope dispersion, but significant effect on the collisions in bend section. With the increase of the solid mass flow, the particle rope seemed stronger and more dispersed at a low rate, and there was a shield formed to impede particle-wall collision at the bend section. The increase of the bend radius ratio also made the particle rope stronger, and the dispersion rate lower.]]></description>
<pubDate>2014/9/4 17:19:45</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[DU Jun,HU Guoming,FANG Ziqiang and FAN Zhao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>DU Jun,HU Guoming,FANG Ziqiang and FAN Zhao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201404023]]></guid><cfi:id>92</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Three dimensional CAD-based computer aided design and assessment 
method for large scale coordinate measurement]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201404024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To deal with the lack of information for coordinate measurement of three-dimensional model and the difficulty of quality evaluation of task-specific coordinate measuring results, the computer aided design method for coordinate measuring technology based on the secondary development of CATIA system was presented, according to the new gengration Geometrical Product Specifications (GPS). The XML data structure for integration of CAD and CMM was designed. The extended data model used UML technology for coordinate measurement was established. The scripted description of measurement process meeting the requirements of new generation of GPS was achieved. Some algorithms for measurement data processing were developed. And method and process of measurement uncertainty evaluation based on Monte Carlo simulation were proposed. Based on the above methods, the special software for three dimensional CAD-based computer aided design and assessment was developed and applied in pose measurement for assembly of aircraft parts. The results indicated that the measurement plan generated by the special software meets the requirements of part docking in aircraft flexible assembly, thus the effectiveness of the method was verified. ]]></description>
<pubDate>2014/9/4 17:19:45</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[YANG Jingzhao,LI Guoxi,WU Baozhong and GONG Jingzhong]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YANG Jingzhao,LI Guoxi,WU Baozhong and GONG Jingzhong</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201404024]]></guid><cfi:id>91</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Design and performance testing of fast axis servo for diamond turning]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201404026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The configuration and control system of a linear long stroke and high frequency fast axis servo (FAS) is developed for the production of asymmetric optics. The maximum stroke of the FAS is 30mm. The proposed Fast Axis Servo (FAS) utilizes the aerostatic bearings driven by a voice coil actuator, a custom linear current amplifier, a high-resolution encoder and a high-speed control system. The static and dynamic characteristic of air slide with different cross-sectional shapes was studied by the finite element method. A control strategy consists of a proportional, integral and derivative (PID) feedback controller and velocity/acceleration feed forward controller was implemented to accommodate the changed system dynamics. The 0.1mm step response was applied on the FAS, the rise time is 2ms, the over shoot is 0.4%, the settling time is 4ms. An aluminum part with the super precision cutting has a surface finish value 24nm Ra. The experiment results indicate that the FAS displays satisfactory dynamic and cutting performance.]]></description>
<pubDate>2014/9/4 17:19:45</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[TIAN Fujing<sup>1,2</sup>,LI Shengyi<sup>1,2</sup>,YIN Ziqiang<sup>1,2</sup> and LI Ning<sup>1,2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>TIAN Fujing<sup>1,2</sup>,LI Shengyi<sup>1,2</sup>,YIN Ziqiang<sup>1,2</sup> and LI Ning<sup>1,2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201404026]]></guid><cfi:id>90</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[On-line measurement for the quality factor of the 
micro-machined gyroscope]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201403013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Quality factor is a key parameter determining the performance of the micro-machined gyroscope. The conventional measurement, the half-power bandwidth method, is low in efficiency, since it requires the user to store and deal with a multitude of amplitude-frequency response data. Based on the analyses on the dynamics model, the quality factor can be calculated according to the resonance frequency and first derivation of the phase-frequency function at the resonance frequency point, and the phase-frequency graph is approximately linear near the resonance point. Upon these characteristics, an online and quick quality factor measurement method was put forward. First, the gyroscope was excited near the resonance point to obtain the phase-frequency data. Then, the slope of the phase frequency was estimated by using the recursive least squares method. Finally, the quality factor was obtained according to the slope and the resonant frequency. The simulation and experimental results verify the correctness and feasibility of the proposed method.]]></description>
<pubDate>2014/7/17 17:22:23</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WANG Ancheng,HU Xiaoping,LUO Bing and WANG Puhua]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Ancheng,HU Xiaoping,LUO Bing and WANG Puhua</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201403013]]></guid><cfi:id>89</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Genetic algorithm with fitness approximate mechanism]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201403021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The evaluation of the fitness is computationally very expensive for some optimization problems; therefore a genetic algorithm named FAGA with fitness approximate mechanisms is introduced. In order to effectively control the accuracy and frequency of the fitness approximation, a fitness approximate model based on the concept of fidelity was established. The fitness of a particular individual in the population was obtained as weighted averages of other individuals within a certain area, the size of the area was limited by the fitness sharing radius, the weights of different individuals were determined by the non-dimensional Euclidean distances between individuals and the particular one, and whether to use the real fitness functions or not was decided by the fidelity thresholds. Besides, mechanisms of the loss of fidelity was adopted to reduce the approximate errors from spread and accumulation, and mechanisms of removing redundancy individuals in order to reduce the computing consumption was used at the same time. Three benchmark functions were used to test the convergence and effectiveness of FAGA. The test results show that FAGA achieves satisfactory the optimal solution among the three test functions, and more than 60% of the computation can be reduced at the same time.]]></description>
<pubDate>2014/7/17 17:22:23</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHAO Ning,ZHAO Yongzhi and FU Chenxi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHAO Ning,ZHAO Yongzhi and FU Chenxi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201403021]]></guid><cfi:id>88</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Cutting force model for fabrication of micro-grooves by single point diamond flycutting]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201402029]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Ultra-precision single point diamond flycutting is a novel method to manufacture the microstructures with grooves. In the flycutting process, the cutting force is an important physical quantity. It is closely associated with cutting quality and tool wearing. To develop the cutting regularity, a flycutting force model based on the theory of orthogonal microcutting was presented. The cutting force model on rake and flank face is achieved. The shear angle in flycutting process was analyzed based on the kinematical regularity. The value of the shear angle in specific processing parameters technological conditions was achieved by single-turn flycutting experiments. To verify the flycutting force model, overlapping flycutting experiments with variant parameters feed rates were carried out. The validity of the force model is demonstrated with the accordance of experiments and theoretical analysis.]]></description>
<pubDate>2014/5/14 0:00:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LIU Yong, YIN Ziqiang, LI Shengyi, GUAN Chaoliang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Yong, YIN Ziqiang, LI Shengyi, GUAN Chaoliang</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201402029]]></guid><cfi:id>87</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Influence of thermal deformation of the spiral bevel gear transmission 
system on gear backlash under normal lubrication condition]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201402031]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Taking the spiral bevel gear transmission system of a helicopter tail reducer as research object, a computation model for the temperature field simulation was built, a steady-state temperature field distribution was derived under normal lubrication condition. The spiral bevel gear can be equivalent to the spur gear in basis in equivalent gear theory, and its gear backlash can be reflected at the transverse plane of the equivalent spur gear .The influence of thermal deformation of the spiral bevel gear transmission system on the gear backlash was computed and analyzed under normal lubrication condition using the thermo-elasticity theory. The results provided a theoretical basis for the design correctness of backlash considering thermal deformation, thus ensuring the working accuracy of the spiral bevel gear.]]></description>
<pubDate>2014/5/14 17:10:49</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[YUAN Jiehong<sup>1</sup>, YAN Xijie<sup>1,2</sup>, ,LI Yuan<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YUAN Jiehong<sup>1</sup>, YAN Xijie<sup>1,2</sup>, ,LI Yuan<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201402031]]></guid><cfi:id>86</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Angular variation analysis of spacecraft assembly based on 
state space model]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201401019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Variation modeling is one of the most important tools for assembly variation analysis. Considering dimension and geometric precision, and part situation precision, the deviation source that affects assembly accuracy is clustered into two types: deviation of geometric location and orientation, variation of geometric form. And these different types of variation or deviation were unified by Virtual Fixture. So a 3D rigid assembly state space modeling technique was developed for stream of variation analysis (SOVA) in multi-station processes. A missile-cabin-assembly process was analyzed in this model. It enhances the applicability in modeling complex assemblies. The developed methodology outperforms the techniques based on other simulations in computation efficiency. It is more powerful not only in forward analysis of complex assembly systems, but also in backward analysis. The model is validated by using Monte Carloseries simulations.]]></description>
<pubDate>2014/3/12 14:49:32</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LI Xin<sup>1</sup>,YU Naihui<sup>1</sup>,CAO Yujun<sup>1</sup>,ZHANG Zhixiong<sup>2</sup> and SHANG Jianzhong<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Xin<sup>1</sup>,YU Naihui<sup>1</sup>,CAO Yujun<sup>1</sup>,ZHANG Zhixiong<sup>2</sup> and SHANG Jianzhong<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201401019]]></guid><cfi:id>85</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Numerical simulation for the performance of a new type 
dual-rotor piston engine]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201401020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Dual-rotor piston engine (DRPE) is a new type of differential rotary engine, with the pistons moving in a circle rather than linearly. Compared with the conventional engines, the complex valve systems can be omitted, and its power density is higher. In order to study the major performance indicators of DRPE, Matlab/simulink was used to simulate the zero-dimension model of its thermodynamic process. With regard to the characteristics of DRPE’s working process, the differential equations were established. Taking into account various period features, the equations were simplified. The ways to solve the major boundary conditions were found. Values of the mass, pressure and temperate were calculated according to different shaft angles. Then DRPE’s indicated mean effective pressure and power to weight ratio were calculated. Compared with some conventional internal combustion engines, the volume of DRPE’s chamber is used more efficiently, and its integral structure is more compact.]]></description>
<pubDate>2014/3/12 14:49:32</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZOU Tengan,PAN Cunyun,XU Xiaojun and CHEN Hu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZOU Tengan,PAN Cunyun,XU Xiaojun and CHEN Hu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201401020]]></guid><cfi:id>84</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Design and optimization of new high-speed and dynamic 
following cutting device of bar]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201401021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[According to the insufficiencies of inability to adjust supporting radius and control cutting precision and shape of cutting blade in existing high-speed and dynamic cutting device of bar, the mathematical model between supporting radius, cutting error and cutting parameters such as cutting mode, number of blades and so on were established based on the analysis of cutting principle, and new adjustable support device was designed using slider-crank mechanism. The curvilinear equation between the shape of cutting blade and grinding parameters such as cutting diameter and installing angle of grinding wheel was built by means of homogeneous coordinate transformation, then a new adjustable grinding device was designed. The speed of cutter, cutting error and other parameters were selected as optimization objects, the nonlinear multi-objective optimization of parameters of the two-blade and two-cutting cigarette cutting device was achieved by using the Matlab optimization toolbox. The project of new high-speed and dynamic following cutting device of bar was proposed, and the new device adopts the cut mode of four-blade and two-cutting. It is found that it has better cutting performance and cutting quality when the cutting efficiency is constant, and the device proves possible after simulation.]]></description>
<pubDate>2014/3/12 14:49:32</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LIU Zijian,LI Siming and WU Xuanhao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Zijian,LI Siming and WU Xuanhao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201401021]]></guid><cfi:id>83</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Nanometer precision fabrication for large scale optical surfaces]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201506001]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Nano-precision optical surfaces are highly demanded in fields of lithography, synchrotron radiation, space observation and inertial confinement fusion. With the  performance rising of equipment, the surface accuracy and roughness of optical elements are further strictly required, which is approaching the theoretical physical limitation. The rising demands bring about tougher challenges for optical fabrication, and  push the technology to the frontier in the nano-precision fabrication area as well. Magnetorheological polishing and ion beam were figured in this research: the stability of material removal rate in nano-level, controllable compensation of complex asphere and dynamics design of equipment axes. The self-developed innovation polishing equipment was produced and the nano-precision fabrication of typical optical elements was realized, which provides strong support for relative science programs of our country, in terms of fabrication technology.]]></description>
<pubDate>2015/12/31 10:10:59</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[PENG Xiaoqiang<sup>1,2</sup>, DAI Yifan<sup>1,2</sup> and LI Shengyi<sup>1,2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>PENG Xiaoqiang<sup>1,2</sup>, DAI Yifan<sup>1,2</sup> and LI Shengyi<sup>1,2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201506001]]></guid><cfi:id>82</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Improving the laser damage performance of fused silica by combining magnetorheological finishing with HF acid etching]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201506002]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to improve the laser damage performance of ultraviolet fused silica, a method which combines magneto-rheological finishing (MRF) with HF acid etching process was proposed to reduce crack and contamination defects in the machining process of traditional processing method. MRF can effectively remove the crack defects with its unique shear and removal principle in traditional machining process while not produce new crack defect. HF acid etching process can effectively reduce metal elements contamination. The experimental results show that fused silica sample using the combined process has a better antidamage performance. Damage density reduced from 0.2mm<sup>-2</sup> to 0.008mm<sup>-2</sup> under the laser flux irradiation of 7J/cm<sup>2</sup>?3ω and from 1mm<sup>-2</sup> to 0.1mm<sup>-2</sup> at the irradiation of 8J/cm<sup>2</sup>?3ω.]]></description>
<pubDate>2015/12/31 10:11:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WAN Wen<sup>1,2</sup>, DAI Yifan<sup>1,2</sup>, SHI Feng<sup>1,2</sup> and PENG Xiaoqiang<sup>1,2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WAN Wen<sup>1,2</sup>, DAI Yifan<sup>1,2</sup>, SHI Feng<sup>1,2</sup> and PENG Xiaoqiang<sup>1,2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201506002]]></guid><cfi:id>81</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Performance testing of a fast tool servo system driven by a voice coil motor]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201506003]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A novel fast tool servo system driven by a voice coil motor has been developed，which has the total stroke of 30mm and the maximum acceleration of 920m/s<sup>2</sup>. The system model was obtained by the experimental process, which was used to design the controller. The micro-lens array, a typical optical surface with complex structure, which was machined, and the experimental results were tested and analyzed. Experimental results indicate that the performances of the developed fast tool servo system satisfy the machining requirements. A good foundation for future application was built in real manufacture.]]></description>
<pubDate>2015/12/31 10:11:01</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[TIAN Fujing<sup>1,2</sup>, YIN Ziqiang<sup>1,2</sup> and LI Shengyi<sup>1,2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>TIAN Fujing<sup>1,2</sup>, YIN Ziqiang<sup>1,2</sup> and LI Shengyi<sup>1,2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201506003]]></guid><cfi:id>80</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Design and performance analysis of ultra-precisionion beam polishing tool]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201506004]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to solve the problem of ion beam figuring, the design and performance analysis of ultra-precision ion beam polishing tool was studied. The research on ion beam polishing tools design method, the structure design of  a 3-grid focused ion optics system and the performance analysis of ion beam was covered. Based on the theoretic calculation and computer simulation, a focused ion optical system was developed. In this ion optical system, an integrated plasma bridge neutralizer was designed to fully neutralize ion beam extracted from ion source. Finally, a 150mm flat optics was figured by two designed focused ion optical systems with 15mm and 10mm output diameter. Figuring result shows that the contour error of this flat is decreased from 15.58nm RMS to 0.79nm RMS. Result further demonstrates that the designed ion beam polishing tool is very efficient to optical ion beam figuring.]]></description>
<pubDate>2015/12/31 10:11:03</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LU Ying<sup>1,2</sup>, XIE Xuhui<sup>1,2</sup>, ZHOU Lin<sup>1,2</sup> and PENG Wenqiang<sup>1,2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LU Ying<sup>1,2</sup>, XIE Xuhui<sup>1,2</sup>, ZHOU Lin<sup>1,2</sup> and PENG Wenqiang<sup>1,2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201506004]]></guid><cfi:id>79</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Shape and position error measurement of cuboid optical element in high precision]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201506005]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[How to realize the high-precision measurement of the shape and position errors of the cuboid optical element and how to use the measurement data to correct these errors are the main problem in the manufacturing process. A shape and position errors measurement method of the cuboid optical elements based on the wave-front interference theory was presented and the measurement system with large aperture instrument and high-precision indexing plate was built. With the help of this system, the parallelism and verticality measurement of the cuboid optical element in the accuracy of 1μm/400mm was achieved and the high-accuracy integrated distribution data of shape and position errors were obtained. The high-accuracy machining of this kind of optical element was achieved by using modern optical machining technology as magnetorheological finishing and computer controlled optical surfacing.]]></description>
<pubDate>2015/12/31 10:11:04</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[GUO Meng<sup>1,2</sup>, DAI Yifan<sup>1,2</sup>, PENG Xiaoqiang<sup>1,2</sup> and TIE Guipeng<sup>1,2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GUO Meng<sup>1,2</sup>, DAI Yifan<sup>1,2</sup>, PENG Xiaoqiang<sup>1,2</sup> and TIE Guipeng<sup>1,2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201506005]]></guid><cfi:id>78</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Correlation between substrate surface quality and laser energy absorption rate for mono-crystalline silicon reflector]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201506006]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In high energy laser systems, the energy absorption rate (EAR) of mono-crystalline silicon reflector is a vital index in the term of elements quality. The substrate process quality affects the EAR of coated optics dramatically. The surface roughness and scratch density for a series of silicon optics were measured. Based on the result, the co-influence and relationship between surface characteristic and EAR were analyzed. It is indicated that, surface roughness level is positively correlated to EAR and decides the global average rate of the entire surface. When the root-mean-square of roughness falls from 0.668nm to 0.345nm, the EAR decreases by 28.0%. In contrast, few scratches do not distinctly raise the EAR, the fluctuation is less than 3.1%. However, the surface scratch may generate laser-induced damage. Furthermore, when the scratch density is large enough, the subsequent EAR will grow constantly, for example, the  amplitude reaches 18.3% after the 400s irradiation, compared with 100s irradiation.]]></description>
<pubDate>2015/12/31 10:11:05</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[TIAN Ye<sup>1,2</sup>, DAI Yifan<sup>1,2</sup>, SHI Feng<sup>1,2</sup>, PENG Xiaoqiang<sup>1,2</sup>, HAN Kai<sup>3</sup>, ZHU Zhiwu<sup>1,2</sup> and WAN Wen<sup>1,2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>TIAN Ye<sup>1,2</sup>, DAI Yifan<sup>1,2</sup>, SHI Feng<sup>1,2</sup>, PENG Xiaoqiang<sup>1,2</sup>, HAN Kai<sup>3</sup>, ZHU Zhiwu<sup>1,2</sup> and WAN Wen<sup>1,2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201506006]]></guid><cfi:id>77</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Correct method of the CCOS edge effect by little tool figuring]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201506007]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[CCOS (Computer Controlled Optical Surfacing) is an important technology for off-axis aspheric surface processing. Edge effect of small tool manufacturing restricts the machining precision and efficiency of CCOS technology. After the key parameters of edge effect were obtained, the warping edge effect of CCOS combined with the residual error trace contour path planning was corrected. The full aperture optical measurement data of a stadium off-axis aspheric is achieved by processing, which provides the  fundament for  subsequent finishing.]]></description>
<pubDate>2015/12/31 10:11:08</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[DU Hang<sup>1,2</sup>, LI Shengyi<sup>1,2</sup> and SONG Ci<sup>1,2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>DU Hang<sup>1,2</sup>, LI Shengyi<sup>1,2</sup> and SONG Ci<sup>1,2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201506007]]></guid><cfi:id>76</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Arc-enhanced plasma machining method of SiC optical material]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201506008]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Since the chemical stability of SiC is extremely high, there is a low efficiency of SiC mirrors for conventional inductively coupled plasma (ICP) processing method. The plasma processing experiment reveals that the increase of plasma radio-frequency can enhance the arc discharge effect between plasma and SiC. The enhancing effect of arc can increase the processing efficiency of SiC, so the arc-enhanced plasma (AEP) processing method was developed. In order to research the formation principle of arc, the voltages of ICP and AEP were measured respectively by using the self-made probe. The conventional and the arc-enhanced methods were employed respectively to conduct linear scanning machining experiment on the sintered silicon carbide (S-SiC), which demonstrates the higher processing efficiency of AEP method.]]></description>
<pubDate>2015/12/31 10:11:09</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[SHI Baolu<sup>1,2</sup>, DAI Yifan<sup>1,2</sup>, XIE Xuhui<sup>1,2</sup> and ZHOU Lin<sup>1,2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SHI Baolu<sup>1,2</sup>, DAI Yifan<sup>1,2</sup>, XIE Xuhui<sup>1,2</sup> and ZHOU Lin<sup>1,2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201506008]]></guid><cfi:id>75</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Geometric model of curve grinding with disk arc wheel]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201506009]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The differences of wheel shape, machining path, motion axis combinations, and workpiece placed posture, will cause alterations of grinding model, which is the primary problem for the solution to curve generation. A geometric model of disk arc wheel was established; a one-to-one mapping relationship was built between workpiece and grinding wheel through the grinding point normal vector matching. After coordinate transformation, the corresponding machining tool motion trail which can be used for grinding was obtained. The uniform grinding geometry model of curve surface was formed, and the calculating flow of tool path was developed. The model has a wide application range, and can solve the tool path generating problem of multiple type grinding processes, which guarantees a  high precision curve surface grinding.]]></description>
<pubDate>2015/12/31 10:11:10</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[PENG Yanglin<sup>1,2</sup>, DAI Yifan<sup>1,2</sup>, SONG Ci<sup>1,2,3</sup> and SHI Feng<sup>1,2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>PENG Yanglin<sup>1,2</sup>, DAI Yifan<sup>1,2</sup>, SONG Ci<sup>1,2,3</sup> and SHI Feng<sup>1,2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201506009]]></guid><cfi:id>74</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Inversion identification of heat transport parameters of conduction cooling high temperature superconducting magnet]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201506027]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In conduction cooling high temperature superconducting (HTS) magnet system, thermal conductivity of HTS magnetic pancakes and thermal boundary resistance between magnetic pancake and cooling body are the major factors affecting heat transport, and the difficult points for the thermal design of conduction cooling HTS magnet as well. A new method, based on the Levenberg-Marquardt algorithm, to simultaneously identify each heat transport parameter from the temperature distribution on the inspection surface was put forward. A low temperature experiment platform was setup, and a three-dimensional orthotropic heat transfer model of magnetic pancake was built. The orthotropic thermal conductivity and thermal boundary resistance of conduction cooling Bi2223 HTS magnet at 45～72 K were obtained with the method mentioned above. The influence of temperature measurement error on identification results was analyzed. The research result  provides a new thought for obtaining heat transport parameters of conduction cooling superconducting magnet.]]></description>
<pubDate>2015/12/31 10:11:30</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LI Xiang<sup>1</sup>, TANG Zhiyin<sup>1</sup>, WU Gang<sup>1</sup>, ZHOU Gang<sup>2</sup>, BI Ke<sup>1</sup> and ZHANG Qingzhi<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Xiang<sup>1</sup>, TANG Zhiyin<sup>1</sup>, WU Gang<sup>1</sup>, ZHOU Gang<sup>2</sup>, BI Ke<sup>1</sup> and ZHANG Qingzhi<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201506027]]></guid><cfi:id>73</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Active tooth surface design of cycloid hypoid gears]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201506030]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to pre-control the meshing performance of cycloid hypoid gears, a conjugate pinion tooth surface was generated by gear theoretical tooth surface. The pinion target tooth surface that meets the preconditions was obtained by modifying the conjugate tooth surface along the contact path and the contact line. The sum of tooth surface normal square errors between pinion theoretical and target tooth surface was calculated. The optimal model was built, setting  the modifications of pinion machining parameters as variables and  the least sum of square errors between pinion tooth surface and pinion target tooth surface on both sides as object. This optimization model was solved via sequence quadratic program. The validity of this modification method was demonstrated by using a numerical example of a high speed axle gear pair. The results show that the max normal errors on both sides are -4.7μm and -4.67μm, the transmission error deviations are 6.67% and 4%, the max contact path deviations are 0.275 mm and 0.177 mm, the results are found  in line with the preconditions. ]]></description>
<pubDate>2015/12/31 10:11:34</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[DU Jinfu<sup>1,2</sup>, FANG Zongde<sup>1</sup>, ZHANG Yongzhen<sup>1</sup> and LI Jianhua<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>DU Jinfu<sup>1,2</sup>, FANG Zongde<sup>1</sup>, ZHANG Yongzhen<sup>1</sup> and LI Jianhua<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201506030]]></guid><cfi:id>72</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[A numerical model for the bar or circular micro-slip dry friction damper]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201505011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A numerical method to solve the contact kinematic problems of elastic bar or circular micro-slip dry friction damper was proposed. Firstly, the damper and the time course of external excitation were discretized in the space and time domain respectively, and the same number of contact points was attached to the discrete damper. Secondly, the  determination criterion of the contact kinematic state of the contact point pairs was used to each contact pair, and the stiffness matrix of the damper was modified. Thirdly, the whole balance equation with the new stiffness matrix was solved in each time step. Differing from the way the finite element software dealing with the contact problem with friction, the iteration was avoided, thus the feasibility of the solution was guaranteed. Meanwhile, the restriction of the distribution and the time variability of the normal load was overcome, and therefore it provided a more accurate boundary condition for solving dynamic response of structure. Lastly, the response of structures  constrained by the macro-slip and micro-slip damper were computed by the MHBM (Multi Harmonic Balance Method) respectively and the distinctness of the solution was analyzed. Results show that the microslip model damper can have a broader normal force range for vibration reduction.]]></description>
<pubDate>2015/11/9 16:21:58</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHAO Ning and LIN Yanhu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHAO Ning and LIN Yanhu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201505011]]></guid><cfi:id>71</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Kinematic performance of new-type power transmission mechanism in twin-rotor piston engine]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201505012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A power transmission mechanism of twin-rotor engine based on wobble plate and cam was proposed. The advantages of the power transmission mechanism of twin-rotor engine based on wobble plate and cam are simple structure, completely symmetrical arranged, good balance, and the movement is controllable. For analyzing its operating characteristics, the basic kinematic model was established by Euler-equation, and its trajectory and cam contour lines were obtained. Effects on volume variation of the main structural parameters, such as plate inclination angle and roller axis angle were analyzed. Main results are as follows: the closer to 90° roller axis angle is, the larger volume variation is. Plate inclination angle is proportional to volume variation. For 4-blade pistons rotor, the maximum plate inclination angle is approximately 65°. In practice, the best roller axis angle is 90°, plate inclination angle should be large enough after taking the thickness of blade piston into account.]]></description>
<pubDate>2015/11/9 16:21:58</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[CHEN Hu<sup>1</sup>, XU Haijun<sup>1</sup>, PAN Cunyun<sup>1</sup>, ZOU tengan<sup>1</sup> and JIANG Lei<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Hu<sup>1</sup>, XU Haijun<sup>1</sup>, PAN Cunyun<sup>1</sup>, ZOU tengan<sup>1</sup> and JIANG Lei<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201505012]]></guid><cfi:id>70</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Gas mixture estimation model based on response equivalent and orthogonal decomposition of transient response signals]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201504028]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on linear mixture assumption or training the classifiers by large amount of data, many methods used to recognize and estimate gas mixtures were adopted the nonorthogonal decomposition of steady response signal. Considering orthogonal decomposition approaches were mainly applied to analyze transient response signals, a gas mixture estimation model based on response equivalent and orthogonal decomposition of transient response signals was put forward. A novel nonlinear gas-mixing model was built after the analysis of MOS(Metal Oxide Semiconductor) gas sensor response characteristics based on the component equivalent expression for different gas responses. A new orthogonal basis function, the EQL (Extended Quasi-Legendre) basis, was proposed and applied to the decomposition of a transient response signal from the gas sensor. After the exponential relationship between the coefficients and the gas concentration was verified via regression analysis, the components in the gas mixture were separated, and their concentrations were estimated simultaneously. Experimental result shows that even though only the prior knowledge of single gas responses was applied to build the model, the concentration determined from the transient response of the gas mixture can reach an error within 15%.]]></description>
<pubDate>2015/9/1 15:03:08</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[QIN Guojun<sup>1,2</sup>, ZHONG Ming<sup>3</sup>, ZHANG Wenna<sup>1</sup> and HU Niaoqing<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>QIN Guojun<sup>1,2</sup>, ZHONG Ming<sup>3</sup>, ZHANG Wenna<sup>1</sup> and HU Niaoqing<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201504028]]></guid><cfi:id>69</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis and realization on time-delay control system of magnetic flux compression generator]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201503023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Time-delay control system is very important to magnetic flux compression generator’s operation. Based on circuit delay scheme, an appropriate model was built to analyze the initiation time sequence, and its errors dispersion was analyzed. A switch driven by detonation was proposed, its voltage endurance capability and plate deformation were analyzed by simulation. On this basis, six switches were tested at high voltage. The data shows that, there is no voltage breakdown at 5kV, responsetime distributes in 66±5μs with standard deviation of 2.7μs, conducting time is equal or greater than 900μs, discharge efficient is approximately equal to 90%. A minitype magnetic flux compression generator was used to test the time-delay control system and the results show that, the time difference between magnetic flux compression generator’s operation and current peak is only 1.8μs with the error being 7.8%. ]]></description>
<pubDate>2015/6/30 18:53:57</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[SHI Yunlei, ZHANG He, MA Shaojie, GU Lin and HE Hai]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SHI Yunlei, ZHANG He, MA Shaojie, GU Lin and HE Hai</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201503023]]></guid><cfi:id>68</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis for structural parameters of explosively formed projectile in multi-functional warhead]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201503025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The formability of EFP(Explosively Formed Projectile) in multi-functional warhead scheme was analyzed by using AUTODYN simulation software. Compared with the traditional layout program, the changed fragment scheme changes the deformation process of shaped charge liner and leads to the shape variation of EFP, thus reducing the penetrating performance. Through analyzing the structural parameters, the optimized solution was proposed to solve the shaping problem of EFP after the adjustment of fragment scheme.]]></description>
<pubDate>2015/6/30 18:53:57</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[CHANG Jiang<sup>1</sup>, WU Gongping<sup>1</sup>, FAN Yu<sup21</sup> and TANG Hanwei<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHANG Jiang<sup>1</sup>, WU Gongping<sup>1</sup>, FAN Yu<sup21</sup> and TANG Hanwei<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201503025]]></guid><cfi:id>67</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Remaining useful life prediction based on degradation rate tracking particle filter]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201503026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[There is no doubt that remaining useful life prediction is important to the health management of modern equipment. Particle filter method has been widely applied to the prediction of equipment remaining useful life in recent years, because it can solve the filtering problem of nonlinear and non-Gaussian systems better and it allows the uncertainty management. However, the prediction performance of a particle filter method is largely dependent on the prediction model and is very sensitive to the initial distribution of the model parameters. These flaws limit the further development of particle filter methods in the prediction to a certain extent. Aiming at the shortcomings of the basic particle filter prediction method, a kind of general prediction framework based on degradation rate tracking particle filter was presented. In the proposed method, the statistical rule of historical data was utilized to guide the degradation rate tracking of target data and simplify the prediction process. The remaining useful life prediction cases of rolling bearings and Li-ion battery verified the effectiveness of the proposed method.]]></description>
<pubDate>2015/6/30 18:53:57</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[FAN Bin, HU  Lei and HU Niaoqing]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>FAN Bin, HU  Lei and HU Niaoqing</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201503026]]></guid><cfi:id>66</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Optimized design of dynamic behavior of double helical 
gears with high contact ratio]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201502030]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Considering the design of high contact ratio of double helical gears, based on the loaded tooth contact analysis technology, the bending-torsional-axial coupling dynamic model of modification double helical gears was established with the concentrated parameter method in the consideration of the special axial floating installation characteristics of pinion, the stiffness excitation, error excitation and meshing impact excitation. The dynamic equations were deduced by the newton method and the vibration acceleration of gear transmission system was obtained. A fitness approximation genetic algorithm was introduced to dispose the problem of time waste in calculating fitness. The root mean square of vibration acceleration was selected to be object function to optimize the basic design parameters and parabola modification coefficient by the fitness approximation genetic algorithm. 〖JP〗The effectiveness of the optimization method was confirmed by the given example. In the end, the noise values of original gears and optimization ones obtained by the loaded test further verify that the optimal method has certain effects on the noise reduction of gears.]]></description>
<pubDate>2015/5/16 9:33:25</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHAO Ning, QIU Pengyuan and LIU Guili]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHAO Ning, QIU Pengyuan and LIU Guili</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201502030]]></guid><cfi:id>65</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Modification optimization of double helical 
gears with high contact ratio]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201501028]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Parabola modification method of double helical gears was proposed, tooth contact analysis of modified gears including typical install errors was established based on tooth contact analysis of helical gears. Considering the transmission errors and meshing performance, transmission behavior of double helical gears was optimized from using the fast non-dominated sorting genetic algorithm to obtain the best parabola modification coefficient which could also avoid the local convergence. Examples show that path of contact and transmission errors of optimized gears are preferable distinctly. It has an important significance in improving distribution of load of tooth surface as well as reducing gear meshing impact. In the end, the noise value of original gears and optimization ones are obtained by the loaded test, further verifies the optimal method has certain effect on the noise reduction of gears.]]></description>
<pubDate>2015/3/19 11:35:44</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHAO Ning,QIU Pengyuan and LIU Guili]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHAO Ning,QIU Pengyuan and LIU Guili</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201501028]]></guid><cfi:id>64</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Fault diagnosis method of mechanic-electronic-hydraulic control system based on the combined virtual prototyping and probabilistic neural network]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201606019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In the diagnosis of large-scale mechanic-electronic-hydraulic control system, and for the mathematical model was hard to build and the historic fault data was short, a hybrid fault diagnosis method based on virtual prototyping and PNN (probabilistic neural network) was proposed. Virtual prototyping was first built and its credibility was validated. On this basis, fault injection and simulation were conducted to obtain fault data, which was then extracted as fault features and trained by PNN to form diagnosis knowledge library. A case study of steering system was presented to verify the correctness of the proposed method, which shows that the accuracy of fault detection and isolation is high and the rate of false/missing alarm is low. The proposed method may bring a novel idea for the fault diagnosis of large-scale and complicated mechanic-electronichydraulic control system.]]></description>
<pubDate>2016/12/31 18:39:27</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[HE Deyu<sup>1,2</sup>, HU Niaoqing<sup>1,2</sup>, HU Lei<sup>1,2</sup>, CHEN Ling<sup>1,2</sup> and GUO Yiping<sup>3</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HE Deyu<sup>1,2</sup>, HU Niaoqing<sup>1,2</sup>, HU Lei<sup>1,2</sup>, CHEN Ling<sup>1,2</sup> and GUO Yiping<sup>3</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201606019]]></guid><cfi:id>63</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Rigid-flexible coupling dynamics simulation of anti-backlash gear  considering shaft distance errors]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201605027]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[It is widely recognized that the shaft distance errors have vital effect on the accuracy and performance of anti-backlash gear transmission system. However，the essential mechanism and property is still undiscovered. Based on the contact constrained dynamics model of anti-backlash gear transmission system，the rigid-flexible coupling dynamics model of anti-backlash gear transmission system was established by adopting the ADAM/ Flex. Then，the rigid-flexible coupling dynamics simulation was carried out to study the vibration and frequency characteristics of the anti-backlash gear transmission system with different shaft distance errors. It is discovered that the spring torque，contact force and the friction torque will increase with the decrease of shaft distance，which will hamper the normal motion of the active gear and reduce the magnitude of rotation speed of the fixed shaft ; the main frequency of the main shaft will decrease with the increase of shaft distance，and the decrease will be sharper when the shaft distance is a little more larger than the standard centre distance. These discoveries will be helpful in the design and assembly of anti-backlash system.]]></description>
<pubDate>2016/11/8 9:36:56</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LUO Zirong<sup>1</sup>, YANG Zheng<sup>2</sup>, SHANG Jianzhong<sup>1</sup>, YU Naihui<sup>1</sup> and CAO Yujun<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LUO Zirong<sup>1</sup>, YANG Zheng<sup>2</sup>, SHANG Jianzhong<sup>1</sup>, YU Naihui<sup>1</sup> and CAO Yujun<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201605027]]></guid><cfi:id>62</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Sensitivity analysis of torque axis considering times of load action with multiple failure modes]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201605028]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Several potential failure modes may occur when mechanical components fail, and they have several correlation in some way. For that the conditions of times of load action have an impact on the reliability of mechanical components. Thus it is necessary to take all the failure modes and times of load action into account when analyzing the mechanical reliability sensitivity. Combining the order statistic theory to study the influence of times of load action on the reliability and sensitivity calculation, and applying the probabilistic perturbation method, the research built a reliability calculation model of mechanical components with multiple failure modes and times of load action modes  using the stress-strength interference mode. The calculating formulas of reliability sensitivity with respect to the mean and variance of random variables were derived with the gradient method. According to the result of the torque axis reliability sensitivity analysis, the curves of reliabilities and sensitivities can be obtained, and the production can be very useful if it is extended to correlated area of machine sensitivity design.]]></description>
<pubDate>2016/11/8 9:36:34</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LIU Zhe, TAO Fenghe and JIA Changzhi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Zhe, TAO Fenghe and JIA Changzhi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201605028]]></guid><cfi:id>61</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis on imperfect failure data of warship electromechanical system]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201605029]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The fault data of ships′ mechanical system are usually not well recorded during operation and maintenance activities, and are typically incomplete and inaccurate. For such incomplete data, fault trend was justified by graphical representation. On this basis, historical fault data was analyzed using homogeneous Poisson process, non-homogeneous Poisson process and geometric process respectively. Numerical results show that the fault of geometric process is minimized, and the future fault intensity can be predicted.]]></description>
<pubDate>2016/11/8 0:00:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[CHEN Dandan<sup>1</sup>, YAO Zhigang<sup>1</sup>, LI Lei<sup>2</sup> and LIU Yanbin<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Dandan<sup>1</sup>, YAO Zhigang<sup>1</sup>, LI Lei<sup>2</sup> and LIU Yanbin<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201605029]]></guid><cfi:id>60</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Multi-layer structural architecture for bio-inspired self-healing hardware]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201604013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Inspired by the circulatory secretion and paracrine of hormone, aimed at solving the problems such as low efficiency and complexity  during the cellular communicating, a four-layer structural architecture for bioinspired self-healing hardware based on NoC (network on chip) and neighborhood connections was proposed. A self-healing hardware realizing an FIR (finite impulse response) filter based on the architecture was brought in to explain the architecture in detail. The hardware shows flexible routing ability and good fault-tolerant ability. It indicates that the structural architecture provides a new approach to design a self-healing hardware with high reliability. ]]></description>
<pubDate>2016/9/13 11:24:53</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WANG Nantian, QIAN Yanling and LI Yue]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Nantian, QIAN Yanling and LI Yue</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201604013]]></guid><cfi:id>59</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Active control technology using flexible neural network sliding mode algorithm]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201604020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[For solving the vibration control problem in complex excitation, the active control of magnetostrictive actuator of Jiles-atherton model in double-layer vibration isolation system was researched. Based on the traditional sliding mode control, a flexible neural network sliding mode control algorithm was proposed and the controller switching matrix was designed by the regularization method, then the updating formulas of the neural network weights and flexible mapping parameter were also established. Furthermore the control strategy was used for the active vibration control in double-layer vibration isolation system. Finally, the single frequency, multi frequency and random signal excitation were simulated and the results show that the flexible neural network sliding mode controller has a strong robustness and a good control effect.]]></description>
<pubDate>2016/9/13 11:24:53</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[YANG Qingchao<sup>1</sup>, YANG Lihua<sup>2</sup>, ZHU Shijian<sup>1</sup> and LOU Jingjun<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YANG Qingchao<sup>1</sup>, YANG Lihua<sup>2</sup>, ZHU Shijian<sup>1</sup> and LOU Jingjun<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201604020]]></guid><cfi:id>58</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Application of signal sparse decomposition theory in bearing fault detection]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201603024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A new bearing fault detection method based on the signal sparse decomposition theory was developed. An over-complete dictionary on which the bearing vibration signals in normal state can be represented sparsely was trained by the dictionary learning method. According to the fact that this dictionary just can sparsely represent the signals in normal state, the bearing vibration signal in unknown state was decomposed on this dictionary. The bearing state was determined by comparing the representation error of the signal on the dictionary with the given error threshold, and then the bearing fault detection was achieved. Experimental tests validate the effectiveness of the proposed method in bearing fault detection when setting an appropriate error threshold.]]></description>
<pubDate>2016/7/7 11:14:25</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHANG Xinpeng, HU Niaoqing, CHENG Zhe, HU Lei and CHEN Ling]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Xinpeng, HU Niaoqing, CHENG Zhe, HU Lei and CHEN Ling</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201603024]]></guid><cfi:id>57</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Maintenance optimal model for phased array antenna with regional quantification]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201602016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[There exist several problems in the maintenance of phased array antenna, such as high maintenance costs, unsure maintenance chance, complicated model simulation and arithmetical operation. Considering these problems, a maintenance optimal model was put forth on the basis of regional quantification. A regional quantification model was given, and then the maintenance problems of phased array antenna were turned into the maintenance optimal of a k/n system, which consists of different regional array elements. A maintenance optimal model for the antenna was built, which chooses minimum maintenance costs per unit time as the object and the operational availability as the subject. Simulations and analysis of one instance were conducted to verify the validity of the proposed model. The results show that the proposed model could solve the maintenance problems of the asymmetrical array antenna well. ]]></description>
<pubDate>2016/5/6 16:32:21</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WANG Yongpan<sup>1</sup>, YANG Jiangping<sup>1</sup>, ZHANG Yu<sup>2</sup> and LI Lujun<sup>1,3</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Yongpan<sup>1</sup>, YANG Jiangping<sup>1</sup>, ZHANG Yu<sup>2</sup> and LI Lujun<sup>1,3</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201602016]]></guid><cfi:id>56</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Acoustic radiation characteristics of gas-bag coated water-filled cylindrical shell]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201602030]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to reduce the underwater radiated noise of WCS (water-filled cylindrical shell) excited by an interior point acoustic source, a gas-bag was coated on the outer surface to form the gas-bag coated cylindrical shell. In order to give instructions on the design of GCWCS (gas-bag coated water-filled cylindrical shell), the bare and the gas-bag coated WCS were respectively simplified into the single-leaf and the double-leaf partitions. By comparing the wave impedances of the partition, gas and water, the influences of the sound velocity and thickness of gas on the low frequency radiation of double-leaf partition with plane incidence sound wave were analyzed. Analysis results show that gases with smaller sound velocity and proper thickness have better radiation noise reduction effect. The acoustic infinite element method was employed to calculate the underwater acoustic radiation of GCWCS, whose results are in good accordance with those of the partition analysis. The underwater radiated sound power and the far-field radiation sound pressure of the optimized CO<sub>2</sub>-bag coated WCS are much lower than the bare one.]]></description>
<pubDate>2017/5/17 16:58:49</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[DUAN Jiaxi, ZHOU Qidou and ZHENG Han]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>DUAN Jiaxi, ZHOU Qidou and ZHENG Han</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201602030]]></guid><cfi:id>55</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Thermodynamic process of sphere cam engine applied in hybrid electrical vehicle]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201601030]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Basing on the introduction of working principle and structure of sphere cam engine, the variation of cylinder volume was studied. Furthermore, the theoretical thermodynamic model of engine was established to analyze the combustion process of sphere cam engine. Then the theory result was compared with the simulation result in FLUENT. The oil spray process was studied in detail. Results show that the calculated pressure curve and temperature curve in cylinder are similar to the simulation results, which validates the validity of theory model. However, the vortex of sprayed oil observed in FLUENT can lead to the rich oil phenomena, which may decrease the combustion efficiency. ]]></description>
<pubDate>2016/3/7 9:21:23</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHANG Lei, XU Haijun, PAN Cunyun and XU Xiaojun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Lei, XU Haijun, PAN Cunyun and XU Xiaojun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201601030]]></guid><cfi:id>54</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Bearings health monitoring under varying operation conditions using relevance vector machine and adaptive threshold model]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201601027]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Operation conditions usually change when rotating machinery works. The changing operational conditions and machine fault can make the mechanical vibration characteristics change and cause diagnosis errors, so a new method for the health monitoring of bearings under changing operational conditions was proposed. In this method, the RVMs (Relevance Vector Machines) were used for obtaining the continuous function relationships between the adaptive parameters of the threshold model and the characteristic statistics of vibration features. Based on the characteristic statistic in different operation conditions, the adaptive threshold model was constructed. This method was used for bearings health monitoring at different revolving speed. Monitoring results show that this method is effective only when the rotational speed is higher than a relative small value.]]></description>
<pubDate>2016/3/7 9:21:23</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[HU Lei<sup>1,2</sup>, FAN Bin<sup>1,2</sup>, HU Niaoqing<sup>1,2</sup> and GAO Ming<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HU Lei<sup>1,2</sup>, FAN Bin<sup>1,2</sup>, HU Niaoqing<sup>1,2</sup> and GAO Ming<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201601027]]></guid><cfi:id>53</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Key technology of transplantable human auricular scaffold based on 3D printing]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201601028]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The key technology of making human auricular scaffold by using medical silicon was researched. CT scan and reversed modeling were used to obtain the digital auricular model. And the 3D printing technology was utilized to manufacture the mold of auricular scaffold. The medical silicon MED 4735 was used as the material of the scaffold. Animal experiments were then implemented to examine the biocompatibility of the scaffold. The scaffold made by these technologies highly imitates a normal auricle, with high accuracy, short manufacturing cycle, and no immune rejection, which provides the basis for further clinical human experiments.]]></description>
<pubDate>2016/3/7 9:21:23</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[SHANG Jianzhong, JIANG Tao, TANG Li and WANG Zhuo]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SHANG Jianzhong, JIANG Tao, TANG Li and WANG Zhuo</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201601028]]></guid><cfi:id>52</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Numerical simulation of the damage effects of clamped square plate subjected to the impact of blast wave and fragments]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201706011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The main objective of this study was to explore the dynamic response and damage pattern of a clamped square steel plate under the synergy effect of blast and fragments loading. A numerical-simulation tool was used to further study the combined blast and fragments loading effects on a clamped square steel plate. Through finite element program ANSYS/LSDYNA, simulations of the response behavior and damage pattern of the plate subjected to the combined blast and fragments loading were conducted. Large punched hole caused by the dense fragment cluster will form in the intensively impacted area under proper launch distance. As launch distance increases, large deformation is the main failure modes of the plate, combined with numbers of perforation holes but no large punched hole.]]></description>
<pubDate>2018/1/16 17:02:01</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LI Mao, ZHU Xi, HOU Hailiang, LI Dian, CHEN Changhai, ZHENG Hongwei and XU Wei]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Mao, ZHU Xi, HOU Hailiang, LI Dian, CHEN Changhai, ZHENG Hongwei and XU Wei</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201706011]]></guid><cfi:id>51</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Numerical and experimental investigation on roll damping of small waterplane area twin hull]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201706012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A SWATH (small waterplane area twin hull) installed with stabilizing fins rolling freely in calm water was investigated by both numerical approach and experimental method. Uncertainty analysis was made to verify and validate the numerical method. Both linear roll damping and nonlinear roll damping were obtained and the contributions of the frictional damping and the stabilizing fins to the roll restoring moment were analyzed. The results illustrate that: the numerical free roll decay curve agrees well with the experiment; under the assumption of linear roll mode, the linear roll damping coefficient sees an upward trend with the increase of initial heel angle; the computed free roll decay curves using nonlinear damping coefficients agree well with the experimental results; the frictional damping and the stabilizing fins make minimal contributions to the roll restoring moment for the free roll decay motion in still water.]]></description>
<pubDate>2018/1/16 17:02:01</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[SUN Xiaoshuai, YAO Chaobang and YE Qing]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SUN Xiaoshuai, YAO Chaobang and YE Qing</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201706012]]></guid><cfi:id>50</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Ship structure resonance response prediction and modal damping parameter identification under effect of impulse excitation]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201706013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Starting from the basic principle of modal identification, and the expressions were derived for time frequency response of the excitation force and time response of resonant excitation, and the relationships among the timefrequency domain amplitudes were found. It was concerned that the associated free vibration in the resonant response is difficult to decay in a short time, and it was pointed out that the amplitude of the impulse frequency response spectrum at corresponding frequency is equal to the amplitude of forced vibration under resonant excitation. Based on establishing relationship of response equivalence, the formula of damping ratio was derived by a limited spectral information of impulse response spectrum. The accuracy of response prediction and damping ratio estimation was verified by ship girder model. In addition, the first eight modal damping ratios’ tests of 2 typical ship plate element models of different materials were also completed, and the rapidity and reliability of the method were verified by the numeral calculation binding experimental response frequency spectrum.]]></description>
<pubDate>2018/1/16 17:02:01</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[TANG Yuhang<sup>1,2</sup>, CHEN Zhijian<sup>1</sup> and MEI Zhiyuan<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>TANG Yuhang<sup>1,2</sup>, CHEN Zhijian<sup>1</sup> and MEI Zhiyuan<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201706013]]></guid><cfi:id>49</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Scattering characteristic for L(0,1) mode guided wave at elbow in small diameter tube]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201705025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The experimental and finite element simulation methods were used to investigate the mode conversion, the reflection and the transmission phenomenon at the elbow in small diameter tubes. Excitation signals of different frequency were used to inspect tubes involve elbows of different bending radius. The results show that the mode conversion phenomenon occurs at the elbow and the L(0,1) guided wave converts to F(1,1) guided wave. The orientation of F(1,1) is identical to the extradosintrados direction of the elbow. With the increase of the inspection frequency and bending radius, the reflected F(1,1) mode decreases monotonically while the transmitted F(1,1) mode changes non-monotonically, the reflected L(0,1) mode decreases while the transmitted L(0,1) mode increases. When the inspection frequency and bending radius increase to some extent, the change of inspection frequency or bending radius has little influence on the reflected F(1,1) mode, reflected L(0,1) mode and transmitted L(0,1) mode. The experimental results agree with the simulation results well which validates the truth of the simulation results. The conclusion will provide theoretical guide for the inspection of small diameter tubes involve elbows.]]></description>
<pubDate>2017/11/7 15:44:04</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[GENG Haiquan, WANG Yuemin, CHEN Le and DENG Wenli]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GENG Haiquan, WANG Yuemin, CHEN Le and DENG Wenli</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201705025]]></guid><cfi:id>48</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Measurement of disturbance torque of seeker servo mechanism and optimization of precision assembly process]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201705030]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to reduce the disturbance torque during the assembly of the seeker’s servomechanism, a drive torque measurement system of servo-mechanism was built on the basis of electrical measurement. In the process of precise assembly and adjustment, the drive torque was measured in real time and the assembly parameters were adjusted to reduce the disturbance torque. The characteristics of the mass unbalance torque and the moving cable torque in the driving torque were experimentally verified, and the balancing and routing methods were determined. The relationship between the preload of the bearing and the friction torque of the servo mechanism was also experimentally verified. It is of great significance to solve the problem of automatic running process to reduce the fluctuation amplitude of the friction torque. The method of measuring the rotation error of the rotating shaft is determined, which can be used for determining optimum preload of bearing.  Results show that the traditional assembly process of servo mechanism is optimized, and the qualitative method based on the experience of technician′s experience is optimized as a quantitative method.]]></description>
<pubDate>2017/11/7 15:44:04</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[YU Naihui, SHANG Jianzhong, WU Wei and CAO Yujun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YU Naihui, SHANG Jianzhong, WU Wei and CAO Yujun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201705030]]></guid><cfi:id>47</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Experimental investigation on the seakeeping performance of small waterplane area twin hull in head waves]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201704025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A SWATH (small waterplane area twin hull) in head regular waves was investigated by experimental method. The influences of speed and vertical position of towing point on the seakeeping performance of SWATH were analyzed. The experimental results illustrate that: the transfer functions of both heave and pitch modes depict two peak values with the increase of wave length under different speeds; with the increase of advancing speed, the peak value of transfer functions of heave mode remains almost constant, while the peak value of pitch mode changes moderately; the motion responses with the towing point at center of gravity are slightly smaller than those with the towing point at the thrust axis during all wave lengths except the resonant zone at short waves.]]></description>
<pubDate>2017/9/12 10:09:50</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[SUN Xiaoshuai, YAO Chaobang and YE Qing]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SUN Xiaoshuai, YAO Chaobang and YE Qing</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201704025]]></guid><cfi:id>46</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Key process parameters optimization of hydrodynamic effect polishing]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201704028]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The material removal rate of HEP (hydrodynamic effect polishing) was mainly affected by the distribution of hydrodynamic pressure and shear stress on the workpiece surface, and the key process parameters were sought out accordingly. Based on the fluid dynamic simulation and experiment exploration,  it investigated in detail  how the material removal rate was affected by the wheel immersed depth, the wheel rotated speed and the polishing clearance. The analysis results show that the wheel immersed depth has little effect on the removal rate while the removal rate decreases along with the reduction of the speed and the increase of the polishing clearance. Considering the practical process condition, the optimal wheel immersed depth, speed and polishing clearance are （2/3）R, 300 r/min and 25 μm respectively. Meanwhile, the temperature stability of the polishing head was monitored, and it reached thermal equilibrium within 4 hours at start of the device. Therefore the stability of polishing clearance affected by the temperature can be guaranteed by idling with preheating section.]]></description>
<pubDate>2017/9/12 10:09:51</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[PENG Wenqiang<sup>1</sup>, GUAN Chaoliang<sup>2</sup>, HU Xudong<sup>1</sup> and WANG Zhuo<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>PENG Wenqiang<sup>1</sup>, GUAN Chaoliang<sup>2</sup>, HU Xudong<sup>1</sup> and WANG Zhuo<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201704028]]></guid><cfi:id>45</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Periodic design of equipment shell structure and its vibration property]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201704030]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The BG(band gap) theory of PCs(phononic crystals ) is introduced into the structure design for equipment shell, and the cylindrical shell section of equipment was designed to be periodically composite material structure. Utilizing the model synthetic technology, the transmission characteristics of flexural vibration in the periodic and the non-periodic cylindrical shells are calculated and compared. Results show that, in the periodic shell structure, there exist several flexural vibration BGs; whereas in the non-periodic shell, these BGs will disappear. Further, a periodic cylindrical shell made of composite laminated material is constructed and its vibration properties of are investigated. As expected, the existence of BGs in such a periodic structure is guaranteed and flexural vibration transmitting in this system will be attenuated apparently. Finally, as for practical engineering application, vibration properties of a complex equipment shell of which has periodic section in it are studied. Calculation results reveal that the introduction of BG theory into the vibration control for engineered equipment shell is quite feasible, since the complex equipment shell with locally periodic structure always maintain the BG characteristics.]]></description>
<pubDate>2017/9/12 10:09:51</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LI Yanfei<sup>1,2</sup>, SHEN Huijie<sup>1,2</sup>, SU Yongsheng<sup>1,2</sup> and ZHANG Linke<sup>3</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Yanfei<sup>1,2</sup>, SHEN Huijie<sup>1,2</sup>, SU Yongsheng<sup>1,2</sup> and ZHANG Linke<sup>3</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201704030]]></guid><cfi:id>44</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Optimal configuration model of spare parts for phased array antenna under two-echelon maintenance supply]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201703026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Three problems are normally found in the spare parts configuration of phased array antenna, namely,  the strong redundancy, the batch delivery maintenance and the multi-echelon maintenance. Aiming at these problems, through analyzing the relations among spare parts cost, repair capacity and inventory strategies, an optimal configuration model was established based on the periodic review strategies. Firstly, the repair circulation process of fault component and the periodic supply process of maintenance spare parts were given, and then the system supply availability model was built by analyzing the relations among spare parts, inventories and repair capacity, and the batch arrival queuing theory was also used. Secondly, an optimal configuration model of spare parts was built, which takes minimum spare parts costs as the object and the system availability as the subject. Next,  solution algorithm based on the margin analysis theory to the model was also given. Finally, simulations and analysis of an instance were conducted to verify the proposed model, and results show that the model can solve the spare parts allocation problems of phased array antenna well, and has a high superiority. ]]></description>
<pubDate>2017/7/9 0:00:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WANG Yongpan<sup>1,2</sup>, YANG Jiangping<sup>1</sup>, ZHANG Yu<sup>3</sup> and HOU Xiaodong<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Yongpan<sup>1,2</sup>, YANG Jiangping<sup>1</sup>, ZHANG Yu<sup>3</sup> and HOU Xiaodong<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201703026]]></guid><cfi:id>43</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Guidance of meshing scale of finite element coupled infinite element method for a ring stiffened cylindrical shell]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201703027]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to investigate the meshing scale of the FE-IE (finite element coupled infinite element)  method for a ring stiffened cylindrical shell, the guidance was put forward for the structural wetted surface. Numerical results show that, for ring-stiffened cylindrical shells, the bending wavelength of the main vibration mode can be taken as the reference of meshing scale in FE-IE calculation which is testified with at least two finite elements per distance of stiffeners. There are at least six finite elements per one bending wavelength of the main vibration mode. The bending wavelength of the main vibration mode is used as the reference of meshing scale of FE-IE calculation rather than the shortest wavelength of structural waves. The obtained conclusions are significant to the meshing of structural wetted surface and the controlling of the total number of elements in the interior fluid region.]]></description>
<pubDate>2017/7/9 11:57:47</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[HUANG Zhenwei, ZHOU Qidou, FANG Bin and XIE Jianbo]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HUANG Zhenwei, ZHOU Qidou, FANG Bin and XIE Jianbo</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201703027]]></guid><cfi:id>42</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Impact analysis and experimental research on friction torque of seeker servo mechanism under changing temperature]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201702023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A friction torque analysis model of seeker servo mechanism including thermal coupling deformation was established. The influence of changing environment temperature on geometry parameters and friction torque of angular contact bearing was mainly studied. Taking mirror-type seeker as an example, its friction torque was calculated and analyzed by using the proposed calculation model. Results show that the grease viscosity is the main cause for the dramatic rise of the friction torque  with the decreasing of the temperature, while the thermal deformation has a small impact on it. Based on the electrical method, an experimental system for friction torque measurement was established. And a rapid temperature experiment chamber was used to simulate environment temperature. Theoretical calculation results and experimental results were compared and analyzed. Experiments prove that the results of friction torque experiment agree with the theoretical model calculation.]]></description>
<pubDate>2017/5/11 16:56:56</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[YU Naihui, LI Xin, SHANG Jianzhong and CAO Yujun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YU Naihui, LI Xin, SHANG Jianzhong and CAO Yujun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201702023]]></guid><cfi:id>41</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Resource allocation problem formulation and solution in testability growth]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201702027]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Testability is crucial for the enhancement of system maintainability, and testability growth can promote the testability metric of the system to satisfy the design requirements by a series action of identifying and correcting the testability design defects. The test resources allocating problem arising in delay fix based testability growth was studied and modeled, considering that whether there are constrains on the growth object and growth test cost or not. A Lagrangian relaxation algorithm and local search hybrid optimal algorithm were applied to solve this problem. Simulation results show that the proposed model is feasible for the test resources allocating problem in testability growth test, and the hybrid optimal algorithm can promise the effectiveness and accuracy to the integer programming problem.]]></description>
<pubDate>2017/5/11 16:56:56</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHAO Chenxu<sup>1,2</sup>, QIU Jing<sup>1,2</sup> and LIU Guanjun<sup>1,2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHAO Chenxu<sup>1,2</sup>, QIU Jing<sup>1,2</sup> and LIU Guanjun<sup>1,2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201702027]]></guid><cfi:id>40</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Reliability analysis on yielding strength of hull structure based on random non-probabilistic model]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201806025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A new model, a model of random nonprobabilistic reliability, to evaluate the structure reliability was established based on the theory of random probability and interval non-probabilistic reliability for the randomness of material properties and loads of vessels in-service, and for region character of hull resistance testing result under the inspection of corrosion damage. Furthermore, the method to calculate the reliability index of the new model was investigated in the view of random variables and interval variables mutual transformation. Based on this new model, the reliability of vessel hull structure yield strength was analyzed. The result shows that the model can well reflect the objective uncertainty of structure variables as well as abate the conservatism of evaluation results, and has a strong applicability in reliability evaluation of ships in-service which contain the random variables and the interval variables simultaneously.]]></description>
<pubDate>2019/1/17 0:00:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[HUA Lin, WU Fan and MU Jinlei]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HUA Lin, WU Fan and MU Jinlei</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201806025]]></guid><cfi:id>39</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Influence of arrangement of ribs and bulkheads on vibration and sound radiation characteristics of cylindrical shell]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201805013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The underwater vibration response of cylindrical shell with different ribs and bulkheads arrangement was calculated by using the finite element method and the boundary element method. By means of the wavenumber spectrum method, the vibration and sound radiation of structural waves with different wave numbers were quantized in combination with the acoustic radiation efficiency of the regular wave of a shell. Based on the vibration theory of periodic and aperiodic structure, the mechanism of influence of the ribs and bulkheads arrangement on the vibration and sound radiation characteristics of cylindrical shell was revealed. Through the study it can be found that the shell with aperiodic ribs and bulkheads has better underwater vibration characteristics, which are more affected by the circumferential vibration of shell. And the acoustic radiation characteristics of a shell with aperiodic ribs and bulkheads are not necessarily better than those of a cylindrical shell with periodic ribs and bulkheads.]]></description>
<pubDate>2018/11/15 16:12:22</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[TAN Lu, ZHOU Qidou, JI Gang and PAN Yucun]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>TAN Lu, ZHOU Qidou, JI Gang and PAN Yucun</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201805013]]></guid><cfi:id>38</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Coupling model identification of giant magnetostrictive actuator using invasive weed algorithm]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201805014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The hysteresis model of giant magnetostrictive actuator, considering the hysteresis loss and dynamic stress, can comprehensively reveal the electric, magnetic, mechanical and thermal multi-field coupling effect.  It is often, however, difficult to accurately identify the nonlinear model by the experiment. The intelligent IWO (invasive weed optimization) with a fierce competition mechanism and strong search ability is very suitable for solving the problem of multi-objective physical parameters identification. Nevertheless, the number of seeds is linearly generated in traditional IWO and the distribution variance is lack of adaptability as well, which greatly affects the algorithm convergence speed and model recognition accuracy. Therefore, an improved algorithm with nonlinear propagation and distribution was proposed and applied to the model parameters identification of giant magnetostrictive actuator. The experiment exhibits that the improved algorithm has stronger noise suppression ability, which can accurately identify the physical parameters of the hysteresis nonlinear model with noise signal, and the errors between model predictions and experimental data are much smaller, thus the identified parameters can make the hysteresis nonlinear model comprehensively describe the actuator multi-field coupling mechanism and dynamic characteristics.]]></description>
<pubDate>2019/1/21 16:09:52</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[YANG Lihua<sup>1</sup>, WU Haiping<sup>1</sup>, LIU Shuyong<sup>1</sup> and LI Haifeng<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YANG Lihua<sup>1</sup>, WU Haiping<sup>1</sup>, LIU Shuyong<sup>1</sup> and LI Haifeng<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201805014]]></guid><cfi:id>37</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[On-line fatigue crack closure determination using nonlinear ultrasound testing]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201805015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[A mathematical model which displays the relation between the vibro-acoustic modulation index and the crack contact area was developed. Based on the analysis of crack faces response to the resultant of applied load and plasticity induced crack closure stress, a procedure of on-line approximating the opening and closure stress was proposed. To study the performance of this measuring method experimentally, the on-line vibro-acoustic modulation tests were carried out on a central cracked aluminum alloy fatigue sample. Analysis of the experimental results suggests that the vibro-acoustic modulation technology is not only capable of measuring the fatigue crack opening and closure stresses, but also capable of analyzing the crack closure behavior, even for physically short cracks.]]></description>
<pubDate>2019/1/21 16:09:52</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[JIA Jun<sup>1</sup>, TAO Limin<sup>2</sup>, HU Haifeng<sup>1</sup>, HU Yongpan<sup>3</sup> and LYU Wei<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>JIA Jun<sup>1</sup>, TAO Limin<sup>2</sup>, HU Haifeng<sup>1</sup>, HU Yongpan<sup>3</sup> and LYU Wei<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201805015]]></guid><cfi:id>36</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Impact and analysis of bearing installation errors and pre-tightening amount on the resonant frequency of seeker servo mechanism]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201804018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To predict the dynamic characteristics of seeker servo mechanism in the process of precision assembly, the quantitative relationship between the micro assembly parameters and the resonance frequency of servo mechanism was built by using the theoretical modeling method. Based on the Hertz contact theory, a five-degree-of-freedom bearing stiffness model was established and the influence of the micro assembly errors on the bearing stiffness matrix was modeled and analyzed. Using the theory of Timoshenko beam, the cell matrix of elastic multi-diameter shaft was derived. The method of solving the eigenvalue and eigenvector of the whole system was determined. An analysis system for resonant frequency of servo mechanism was established through using MATLAB/GUI and the experimental system was established to verify the theoretical model. The analysis and experimental results show that the established analytical method and system can accurately calculate the resonant frequency variation caused by the microassembly errors of bearing. This method solves the problem of dynamic characteristic prediction in the process of precision assembly of servo mechanism.]]></description>
<pubDate>2018/9/17 11:14:36</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[YU Naihui<sup>1,2</sup>, LIANG Keshan<sup>1</sup>, WU Wei<sup>1</sup> and CAO Yujun<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YU Naihui<sup>1,2</sup>, LIANG Keshan<sup>1</sup>, WU Wei<sup>1</sup> and CAO Yujun<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201804018]]></guid><cfi:id>35</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Influence of inertia effects on dynamic behaviors of motorized spindle]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201804019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to discuss the dynamic behaviors of the bearingrotor system of high-speed motorized spindles, a rotor dynamic model with centrifugal force, gyroscopic couple and system damp was presented by using finite element method and Timoshenko beam theory. An overall model test on a 120MD60Y6-type motorized spindle was carried out to acquire the natural frequencies with different work conditions. The results indicate that centrifugal force will lead to the bearing softening and spindle shaft softening, and the latter is the main reason of the decrease of the natural frequency of the spindle system. Each natural frequency of the spindle system was divided into the forward and backward modes, and the forward and backward modes had different change regularities with speed. The good agreement between the theoretical results and the experimental data shows that the proposed model is capable of accurately predicting the dynamic behaviors of highspeed motorized spindles.]]></description>
<pubDate>2018/9/17 11:14:36</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LIU Junfeng<sup>1</sup>, LIAO Quan<sup>1</sup>, LAI Tao<sup>1</sup> and CHEN Xiaoan<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Junfeng<sup>1</sup>, LIAO Quan<sup>1</sup>, LAI Tao<sup>1</sup> and CHEN Xiaoan<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201804019]]></guid><cfi:id>34</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Effect of saddle-shaped fuel injection rate coupled with pilot injection on the performance of ultra-high pressure common-rail diesel engine]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201804021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[On the basis of introducing the working principle of ultrahigh pressure common-rail system, the simulation model of ultrahigh pressure common-rail diesel engine of single cylinder was built by using GT-Power software, and the accuracy of this model was verified via experiment, then the effects of different fuel injection rate, saddle-shaped fuel injection rate coupled with different pilot injection fuel mass and different pilot injection advance angle on the power, economy, combustion and emission characteristics of ultrahigh pressure commonrail-diesel engine were analyzed by this model. The results show that the variable fuel injection rate can be realized by adjusting the opening time of the electric-controlled pressure amplifier solenoid valve and the injector solenoid valve in ultra-high pressure commonrail system. With the fuel injection rate varying from rectangular to saddle-shaped, the cylinder pressure, temperature and NO<sub>x</sub> emissions of diesel engine decrease gradually, while the soot emissions rise gradually. The saddle-shaped fuel injection rate can make the diesel engine acquire the maximum power (torque) and the lowest fuel consumption rate. The saddle-shaped fuel injection rate coupled with lesser pilot injection fuel mass can make the diesel engine power, economy and combustion characteristics better, but it also leads to the rise of NO<sub>x</sub> emissions. The saddle-shaped fuel injection rate coupled with larger pilot injection advance angle can improve the emission characteristics of diesel engine, but the effect is not obvious due to the limit of pilot injection fuel mass.]]></description>
<pubDate>2018/9/17 11:14:36</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHOU Lei, YANG Kun, LIU Zhenming, AN Shijie and OUYANG Guangyao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHOU Lei, YANG Kun, LIU Zhenming, AN Shijie and OUYANG Guangyao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201804021]]></guid><cfi:id>33</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Graphene as beneficial additive to water based semisynthetic cutting fluid for improving friction condition between materials of carbide and steel]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201804022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Carbide with its products is extensively applied in the field of mechanical machining of metal materials. In this study, graphene was employed as a beneficial additive to semisynthetic cutting fluid 3034, and the related frictional characteristic behavior was investigated via experimental on carbide-steel friction pair. In the experiment, a ball specimen was made of the carbide material of YG8, and a disk was made of the steel material of 45#. On the basis of ball-on-disk friction pair, experiments were conducted on a tribometer machine. The mass fraction of graphene in the tested coolant ranges from 0.1% to 0.9%. Surface topologies of the specimen were investigated using a laser confocal microscope. The scanning electron microscope and Raman spectra analysis was used to analyze wear mechanism. Experimental results revealed the improvement of lubrication condition between carbide and steel is substantially improved, demonstrated by the decreasing of averaged friction coefficient by 12.9% to 57.3% as well as the decreasing of wear rate by 33.82%. The resultant cutting force was decreased by 18.58% compared with that of semisynthetic cutting fluid 3034, and the surface roughness was reduced by 7.5% of the machined workpiece.]]></description>
<pubDate>2018/9/17 11:14:36</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[YAO Bin, HE Yuchao, SUN Weifang, CAO Xincheng, CHEN Binqiang and ZHENG Qing]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YAO Bin, HE Yuchao, SUN Weifang, CAO Xincheng, CHEN Binqiang and ZHENG Qing</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201804022]]></guid><cfi:id>32</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Current status and prospect for the method on reliability analysis of hull structures in-service]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201804026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[As the key technology of reliability evaluation for hull structure in-service, the merits of the reliability assessment theories determines the effectiveness and confidence level of the reliability evaluation result directly. The development course and current research situation of traditional reliability assessment theories and non-probabilistic reliability assessment theory were elaborated in the view of calculation principle, computing of measurement index and engineering application. Simultaneously, the advantages and disadvantages of all current reliability assessment theories that applied in hull structure in-service were analyzed and summarized. The future research outlook was developed and the focus in the study of hull structure reliability was outlined.]]></description>
<pubDate>2018/9/17 0:00:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[HUA Lin<sup>1,2</sup>, WU Fan<sup>1,2</sup>, LYU Yansong<sup>1,2</sup> and MU Jinlei<sup>1,2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HUA Lin<sup>1,2</sup>, WU Fan<sup>1,2</sup>, LYU Yansong<sup>1,2</sup> and MU Jinlei<sup>1,2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201804026]]></guid><cfi:id>31</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Experimental comparative analysis of control characteristics of laser focus control magnetic force drive]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201803019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to satisfy the requirements of position and velocity response of the laser focus control system, a three-degree-of-freedom laser focus magnetically driven micro-motion platform was designed. According to the structure of the freestyle platform, the mechanical analysis and the establishment of the kinetic equation were carried out. On this basis, the PID(proportion integration differentiation) control experiment and the robust control experiment of the fretting platform were carried out. Results show that the two control strategies can achieve a stable driving of the micromotion platform. However, under the PID control strategy, the response speed is better; while under the robust control strategy, the anti-jamming ability is better.]]></description>
<pubDate>2018/7/11 12:40:21</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[TONG Ling<sup>1</sup>, WU Liping<sup>1</sup>, JIN Jiaqi<sup>1</sup>, SUN Feng<sup>1</sup> and ZHANG Xiaoyou<sup>1,2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>TONG Ling<sup>1</sup>, WU Liping<sup>1</sup>, JIN Jiaqi<sup>1</sup>, SUN Feng<sup>1</sup> and ZHANG Xiaoyou<sup>1,2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201803019]]></guid><cfi:id>30</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Dynamic responses analysis of pre-liquid cabin of multi-layered protective structure subjected to underwater contact explosions]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201803022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to probe into the design of multi-layered protective structure, the finite element method was used to simulate the typical mode and the preliquid cabin mode of the same multi-layered protective structure, and the validity of numerical simulation method was verified by comparison of the typical mode and experimental results. The influences of the pre-liquid cabin mode on the dynamic response process, the failure mode and the protective efficiency of the multi-layered protective structure were analyzed specifically, and its forming mechanism was analyzed. The differences between the two modes were compared from the following three aspects: the structure failure process, the load characteristics and the energy absorption characteristics. Finally, the protective mechanism of multi-layered protective structure is discussed, which provides a reference for the engineering design of underwater broadside protection structure of surface vessels.]]></description>
<pubDate>2018/7/11 12:40:21</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[JIN Jian<sup>1</sup>, HOU Hailiang<sup>1</sup>, CHEN Pengyu<sup>1</sup>, HUANG Xiaoming<sup>2</sup>, WU Linjie<sup>1</sup> and ZHU Xi<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>JIN Jian<sup>1</sup>, HOU Hailiang<sup>1</sup>, CHEN Pengyu<sup>1</sup>, HUANG Xiaoming<sup>2</sup>, WU Linjie<sup>1</sup> and ZHU Xi<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201803022]]></guid><cfi:id>29</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Validation metric for single output models with stochastic and interval mixed uncertainty]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201803026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[For the models with interval input variables and random input variables simultaneously, a validation metric was researched to measure the agreement between the quantitative predictions from an uncertain model and relevant empirical data. With respect to different sources of uncertainty existed in engineering mathematic models and experiments，the characteristic of the validation for models with stochastic and interval mixed uncertainty was analyzed. A new validation metric for model with stochastic and interval mixed uncertainty was proposed by using the interval theory and the probability method. The properties of the proposed validation metric were discussed, and its calculation method and procedures were presented. A numerical test case and an engineering example were used to verify the feasibility and effectiveness of the proposed validation metric.]]></description>
<pubDate>2018/7/11 12:40:22</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHAO Lufeng<sup>1</sup>, LYU Zhenzhou<sup>1</sup> and KAN Lijuan<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHAO Lufeng<sup>1</sup>, LYU Zhenzhou<sup>1</sup> and KAN Lijuan<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201803026]]></guid><cfi:id>28</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Lifting capacity model based on wheel-rope friction for portable rope-track hoist]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201802022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to improve the usability of PRTH (portable rope-track hoist), the friction-based PRTH lifting capacity was studied. The influence of tension at the end of the rope, wrap angle and relative size on the friction between the wheel and the rope was experimentally studied by using the control variant method. The results show that: the friction increases with the increase of the three factors, but the trend is slowed down; the coefficient of static friction decreases with the increase of the end tension and the wrap angle and tends to be stable, and it increases with the relative size of the wheel to the rope and converges to a constant. The effects of wrap angle and end tension on the friction were demonstrated to be identical to each other, the size effect of wheel-rope friction was found, and a new lifting capacity model on wheel-rope friction was established with the three factors. The model is the sublation of Euler formula, deepens the understanding of the friction law between the wheel and the rope, and is of great significance to the miniaturization and lightweight design of PRTH.]]></description>
<pubDate>2018/5/11 16:33:58</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[YIN Hao<sup>1,2,3</sup> and YE Peiqing<sup>1,2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YIN Hao<sup>1,2,3</sup> and YE Peiqing<sup>1,2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201802022]]></guid><cfi:id>27</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Stress analysis of circumferential connection in circular inner pressure tank]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201802023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[For inner pressure tank, with the comparison of stress variation of pressure tank frames at two different forms of connection, the influence of different loading conditions on deformation and stress characteristics of the tank shell plate was analyzed. The results show that for different connection forms, the best angle β between the section changing location and the tank top plate exists with each form. In the circumferential range, different schemes mainly affect the tank top plate longitudinal stress and the circumferential stress of the frame and rib is affected by the β values.]]></description>
<pubDate>2018/5/11 16:33:58</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WU Chunfang<sup>1,2</sup>, WU Fan<sup>1</sup>, LU Qingliang<sup>1</sup> and LIU Ling<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WU Chunfang<sup>1,2</sup>, WU Fan<sup>1</sup>, LU Qingliang<sup>1</sup> and LIU Ling<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201802023]]></guid><cfi:id>26</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Investigation on perforation mechanism of targets impacted obliquely by projectiles with hemispherical nose in low velocity]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201801008]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To explore the failure modes of the targets subjected to oblique impact of the projectiles with hemispherical nose， ballistic tests were carried out and the attitude of the projectiles was captured with the high-speed camera. The damage modes of projectiles as well as targets were analyzed and the apertures of the targets were measured. It was shown that the dynamic response of the target was not completely symmetric under oblique impact and the target was divided into four partitions according to the mechanic characteristics, which were contact area, bending area, tensile area and symmetric area. The penetration process was divided into four stages which was bulge, dishing, bending and perforating, according to the deformation modes. The failure modes of the targets consist of four typical patterns with the variation of the initial velocity of the missiles. The first one was bulge-dishing-deformation when the initial velocity was low to the ballistic limit. The second one was bulge-dishing-tensile & bend tearing when the velocity was higher. The third one was bulge-dishing-tensile & bend shearing with the increase of the velocity. The fourth one was bulge- tensile & bend shearing when the velocity was largely higher than the ballistic velocity. The aperture of the targets in the front view was elliptical when subjected to oblique impact of the projectiles with hemispherical nose and it was gradually transferred to the oval with the increase of the velocity.]]></description>
<pubDate>2018/3/23 11:05:19</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[XU Wei, CHEN Changhai, HOU Hailiang, ZHU Xi and LI Mao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Wei, CHEN Changhai, HOU Hailiang, ZHU Xi and LI Mao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201801008]]></guid><cfi:id>25</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Motion characteristic analysis of rotary self-stabilizing terminal sensitive submunition]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201801022]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to study the motion characteristics of a certain type of rotary selfstabilizing terminal sensitive submunition, the submunition′s asymmetric structure characteristics and its initial projection condition were fully considered. The dynamic unbalance missile model was introduced to derive the 6 degrees of freedom trajectory equation of the submunition and analyze the characteristics of steady state scanning motion of submunition. Results show that the submunition′s asymmetric mass distribution and the initial angular velocity are the necessary condition for the realization of the steady state scanning. The scanning frequency of the submunition is only determined by the projection angular velocity ω<sub>σ0</sub>, and is positively correlated with the ω<sub>σ0</sub>. When the initial pitch angle φ<sub>a0</sub>≥0°, the overall trend of scanning angle is increased, and when φ<sub>a0</sub>＜0°, the scanning angle decreases and then increases. The scanning area is positively correlated with the mass ratio of weight and projectile, the φ<sub>a0</sub>, the initial yaw angle and the ω<sub>σ0</sub>, and is negatively correlated with the ratio moment of inertia of the center cylinder.]]></description>
<pubDate>2018/3/23 11:05:20</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[YANG Yongliang<sup>1</sup>, LIU Rongzhong<sup>1</sup>, GUO Rui<sup>1</sup>, CHEN Liang<sup>1</sup>, ZHAO Bobo<sup>1,2</sup> and XING Boyang<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YANG Yongliang<sup>1</sup>, LIU Rongzhong<sup>1</sup>, GUO Rui<sup>1</sup>, CHEN Liang<sup>1</sup>, ZHAO Bobo<sup>1,2</sup> and XING Boyang<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201801022]]></guid><cfi:id>24</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Rotating compensation method of non-orthogonal tri-axial magnetometer]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201801024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[For the sake of tri-axial magnetometer calibration, an error compensation model of tri-axial magnetometer was established. The sine curve fitting method was proposed to calibrate the tri-axial magnetometer based on spin data. The calibration of triaxial magnetometer could be implemented by calculating the calibration parameters using the initial phase angles of the sine curves. The results indicate that it has high precision to calculate the calibration parameters of tri-axial magnetometer, and the measurement accuracy of calibrated magnetometer is improved significantly. It dose not require high-precision optical pumping magnetometer to measure the magnetic field intensity, thus it puts forward an effective way for calibrating tri-axial magnetometer.]]></description>
<pubDate>2018/3/23 0:00:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[JIA Wendou<sup>1</sup>, LIN Chunsheng<sup>1</sup>, SUN Yuhui<sup>1</sup>, ZHAO Heda<sup>1</sup> and ZHAI Guojun<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>JIA Wendou<sup>1</sup>, LIN Chunsheng<sup>1</sup>, SUN Yuhui<sup>1</sup>, ZHAO Heda<sup>1</sup> and ZHAI Guojun<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201801024]]></guid><cfi:id>23</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Inspection of small diameter bending pipes using magnetostrictive torsional guided wave]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201801026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming to the problem of the inspection of small diameter bending pipes using torsional guided wave, finite element method and experiments were used to investigate the problem. ANSYS was used to simulate the propagation of torsional guided wave in bending pipe. A magnetostrictive torsional guided wave transducer was designed to inspect small diameter pipes. The exciting and receiving theoretical model of the transducer was built. The experimental signals were explained by using the theoretical model. Research results show that mode conversion happens at the elbow of the pipe and part of the T(0,1) mode converts to F(1,1) mode. The orientation of the F(1,1) mode perpendicular to the direction of extrados-intrados. The double end reflection phenomenon in inspection signal is caused by mode conversion. With the increase of frequency, the ratios between end echoes′ trend towards alleviation. The longitudinal magnetostrictive forces excited by the transducer bring about small longitudinal guided wave in the signals. Conclusions will provide theoretical guide to the inspection of small diameter bend pipes using magnetostrictive torsional guided wave.]]></description>
<pubDate>2018/3/23 11:05:20</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[GENG Haiquan, WANG Yuemin, CHEN Le, DENG Wenli and YE Wei]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GENG Haiquan, WANG Yuemin, CHEN Le, DENG Wenli and YE Wei</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201801026]]></guid><cfi:id>22</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Rubber storage life prediction based on step stress accelerated test and a modified Arrhenius model]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201905009]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to accurately and quickly predict the storage life of rubber, the acceleration coefficients at different acceleration temperatures are calculated based on the stepping stress accelerated aging test of high temperature, and the acceleration factor and absolute temperature reciprocal curve was obtained. For the nonArrhenius characteristic, a power exponential factor was introduced, and a modified Arrhenius model was employed to fit the acceleration coefficient. From the slope of the logarithmic reaction rate and the absolute temperature reciprocal curve, the equivalent linear activation energy of the modified Arrhenius model at different temperature was calculated, which indicated that the activation energy decreased at low temperature. The aging life model at low temperature was established and the aging life of the rubber at 10 ℃, 20℃ and 30 ℃ was evaluated respectively. Evaluation result shows that, it can provide reference for nonArrhenius analysis and life prediction in the corrosion process of related polymer materials.]]></description>
<pubDate>2019/9/30 15:58:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LIU Qiaobin, SHI Wenku, LIU Helong, CHEN Zhiyong, CAO Fei and MIN Haitao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LIU Qiaobin, SHI Wenku, LIU Helong, CHEN Zhiyong, CAO Fei and MIN Haitao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201905009]]></guid><cfi:id>21</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Failure analysis of cracked pipes repaired by composites under internal pressure]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201905010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to accurately evaluate the effectiveness and failure pressure of cracked pipelines repaired by fiber composites under static load, a numerical model for the failure of cracked pipelines repaired by composites was established.The numerical model simulated the crack propagation of the pipeline by expanding finite element method. The cohesive element was used to simulate the debonding failure of the adhesive layer. The failure of the composite material was determined by the maximum stress failure criterion. The proposed numerical model of failure was verified by hydrostatic burst test. The experimental results were in good agreement with the numerical results. According to the results of numerical analysis, when the internal pressure increases to a certain value, the initial crack of the unrepaired pipe gradually expands along the axial and wall thickness directions, and then the inner wall unit of the pipe expands into a real crack. At the same time, the real crack runs through the entire wall thickness.The burst failure pressure decreases exponentially with the half length of the initial crack.The different repair conditions of cracked pipelines repaired by composite exhibit the same failure mode:under the monotonically increasing internal pressure of the pipeline, the internal surface of the pipeline first appears a cohesive crack, and the cracking tendency of its outer surface rises sharply, making the stress of the composite material layer rise sharply and reach the ultimate strength.And there are corresponding critical values of the composite layers for different initial crack sizes.]]></description>
<pubDate>2019/9/30 15:58:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[QIU Jinshui, CHEN Rumu, LIU Boyun and REN Guanglu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>QIU Jinshui, CHEN Rumu, LIU Boyun and REN Guanglu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201905010]]></guid><cfi:id>20</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of dynamic response characteristics of interior ballistics process in electromagnetic rail launcher]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201904003]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[By simplifying the rail as a Bernoulli-Euler beam fixed on the elastic support under moving loads and obtaining the equivalent stiffness of the elastic support through the finite element model, the critical velocity of the launcher was derived. Dynamic contact force between the armature and the rail and the distribution of stresses and strains were obtained from electromagnetic-structural-motion multi-physics field coupling dynamic model by using hybrid finite-element/boundary-element method. The measuring data of fiber Bragg grating strain sensors on the back of rails were used to verify the dynamic response and analyze armature stability. For the typical 30 mm × 30 mm rectangular caliber launcher, analysis and test results show that the electromagnetic extrusion force of the C-type armature on the rail reaches the peak value at the beginning of the flat-top and gradually decreases as time goes on; the stress waves caused by armature passing are easily resonant with the reflected stress waves in the rail in the high-speed stage, in which the stress exerted on the rail is the most severe and the stress concentration level is about 2.44 times that in the initial region; when the armature operates in the high-speed region, there will be a vibrating phenomenon which will lead the asymmetry of loads on the upper and lower rails. These results have guiding significance for analyzing dynamic response characteristics of internal ballistic process and design launcher.]]></description>
<pubDate>2019/7/18 0:00:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHANG Yongsheng, LU Junyong, TAN Sai, WU Hai, LI Bai and JIANG Yuanzhi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Yongsheng, LU Junyong, TAN Sai, WU Hai, LI Bai and JIANG Yuanzhi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201904003]]></guid><cfi:id>19</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Design and comparison of graphene electroacoustic transducer]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201904024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to optimize the performance of graphene electroacoustic transducer, the research on the electroacoustic mechanism of graphene thermoacoustic sound device and graphene electrostatic sound device was conducted. Through theory modeling and analysis, the influence of structural parameters such as size, thickness and stress of graphene film on the frequency response characteristics of two kinds of electroacoustic transducers was obtained. Finally, a batch of electroacoustic transducers with different structural parameters were designed and fabricated. The performance test and comparison analysis of these devices show that the thickness of graphene film has a significant influence on the sound pressure of the thermoacoustic transducer, that is, the thinner the film is, the larger the sound pressure of the electroacoustic transducer is. The electrostatic transducer is influenced by the radius, thickness and stress of graphene film, that is, the corresponding film with larger radius, thinner thickness and smaller stress of the electrostatic transducer will have a wider frequency bandwidth. This research can lend support for the optimizing selection of graphene electroacoustic transducer, the optimizing design of structural parameters and the improvement of the device′s sound performance.]]></description>
<pubDate>2019/7/18 15:28:49</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[YANG Peng, CHENG Xianzhe, ZHANG Yong, LIU Guanjun and QIU Jing]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YANG Peng, CHENG Xianzhe, ZHANG Yong, LIU Guanjun and QIU Jing</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201904024]]></guid><cfi:id>18</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Optimization design of solenoid valve for electric-controlled pressure amplifier using genetic algorithm]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201903010]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The simulation model of dynamic response characteristics of solenoid valve was established based on Ansoft Maxwell software, and the accuracy of it was verified by experiment. The sensitivity analysis of parameters affecting the dynamic response characteristics of solenoid valve was conducted by the method of integrating ISIGHT with the model, the Pareto of parameters on the dynamic response characteristics was obtained. The multi-parameter optimization design of solenoid valve was carried out based on genetic algorithm, the optimum parameter combination was achieved, and the comparison experimental research of dynamic response characteristics of solenoid valve before and after parameter optimization was conducted by the experimental bench. The result shows that compared with the original parameter scheme, the dynamic response characteristics of solenoid valve after parameter optimization are improved greatly, and the opening and closing response time is reduced by 59.1% and 47.2% respectively.]]></description>
<pubDate>2019/6/13 15:22:18</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[YANG Kun, LIU Zhenming, ZHOU Lei, LIU Nan and YING Yuchen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YANG Kun, LIU Zhenming, ZHOU Lei, LIU Nan and YING Yuchen</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201903010]]></guid><cfi:id>17</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Three-dimensional effect of floating oscillating vertical axis tidal turbine]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201903011]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to study the three-dimensional effect on the oscillated vertical axis tidal turbine, the CFX software was employed to simulate the oscillated (surge and sway) turbine with different span-chord ratios. The simulation results were then compared with those in 2D situation. And then, the time series curves of thrust and lateral force coefficients of the hydraulic turbine with different aspect ratios were fitted by least square method, and the damping and additional mass coefficients were obtained. The results show that the current power output efficiency of the turbine increases with the span-chord ratio increased. The hydrodynamic load of three-dimensional oscillating tidal turbine is positively correlated with the elongation of the turbine. When the spanchord ratio reaches 10, the hydrodynamic loads and power conversion efficiency of the 3D oscillating turbine are basically the same as those of the 2D one. The constant and damping terms of the hydrodynamic coefficients of the 3D turbine increase with the increase of spanchord ratio.]]></description>
<pubDate>2019/6/13 15:22:18</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZHANG Jinlan<sup>1</sup>, WANG Kai<sup>1</sup>, ZHANG Wanchao<sup>2</sup> and ZHOU Yahui<sup>3</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHANG Jinlan<sup>1</sup>, WANG Kai<sup>1</sup>, ZHANG Wanchao<sup>2</sup> and ZHOU Yahui<sup>3</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201903011]]></guid><cfi:id>16</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Experimental study on hydrodynamic ram generated by high velocity fragment impacting fluid-filled container]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201903012]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to study the hydrodynamic ram generated by high velocity fragment impacting fluid-filled container, a set of experiment device and testing method was designed to record the evolution of the cavity inside the container, the pressure changes at different positions in the liquid and the deformation of the front and rear panels. Experimental results show that a circle of cavitation bubbles will appear when the fragments impact the rear panel of the container, and the bubbles rapidly expand radially from the point of impact on the inner surface of the rear panel. In the shock phase of the hydrodynamic ram, large negative pressure appears in the area close to the impact point after the initial shock wave pressure pulse, and the area away from the impact point is not affected by the negative pressure. The fragment impact velocity has little effect on the maximum deformation of the front panel and the deformation range expands along the impact point as the impact velocity increases.]]></description>
<pubDate>2019/6/13 15:22:19</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[JI Yangziyi, LI Xiangdong, ZHOU Lanwei and LAN Xiaoying]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>JI Yangziyi, LI Xiangdong, ZHOU Lanwei and LAN Xiaoying</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201903012]]></guid><cfi:id>15</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Parametric modeling method of finite element grid for rifling barrel]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201903013]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to establish the finite element grid model of the tube structure accurately and quickly, a parametric modeling method based on the Python script language operating unit and the node coordinates was proposed to establish the finite element grid model of the body tube. Through this method, the finite element mesh model of the tube bore (including the medicine chamber, the slope and the guide part) and the external contour were accurately established and parameterized. In addition, with the 76 mm artillery as the object, the finite element model of the coupling of the barrel and the projectile was established, and the full ballistic motion of the projectile was calculated and verified with the corresponding experiment. The results show that the method can accurately and quickly establish the finite element mesh model of the tube structure.]]></description>
<pubDate>2019/6/13 15:22:19</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[ZOU Libo<sup>1</sup>, YU Cungui<sup>1</sup>, GUO Zhaowei<sup>2</sup> and FENG Guangbin<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZOU Libo<sup>1</sup>, YU Cungui<sup>1</sup>, GUO Zhaowei<sup>2</sup> and FENG Guangbin<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201903013]]></guid><cfi:id>14</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of topological optimum for solid floor design of inner pressure tank]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201903014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[By analyzing the strength and the stability after the topological optimization design of the open-hole topology of the solid floor  in the inner pressure-resistant tank, it is found that the solid floor opened near the inner keel is better for the inner pressure-resistant tank with a circumferential range of 162°. It has little effect on its own stability for the opening of the solid floor, but the stress of the MIMES will change. The stability of the liquid tank structure will be slightly reduced when the hole is opened. So, the structure requires strengthening when designing the liquid tank structure in the later stage.]]></description>
<pubDate>2019/6/13 15:22:19</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WU Chunfang<sup>1,2</sup>, ZHANG Er<sup>2</sup> and ZHANG Yuchen<sup>2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WU Chunfang<sup>1,2</sup>, ZHANG Er<sup>2</sup> and ZHANG Yuchen<sup>2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201903014]]></guid><cfi:id>13</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Identification method of mechanism consistency for rubber seals accelerated  testing based on likelihood ratio test]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201902021]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Accelerated degradation testing has been widely used to investigate the reliability of long lifetime products, including rubber seals. The test results at higher stress levels were extrapolated to the normal stress level in the accelerated degradation testing. For an accurate product reliability evaluation, the failure mechanism under accelerated stresses should be consistent with the mechanism under normal conditions. Based on the likelihood ratio test, an identification method and a flow chart were proposed. For describing the mechanism consistency and variation, log-linear and non-log-linear acceleration models were suggested, and the mixed-effects model was introduced to depict the degradation process. According to the judgment between the consistency and variation of acceleration model parameters, the identification was completed. The simulation test and the real test show that this method can identify the mechanism variation of rubber seals. Moreover, the stress boundary for consistent mechanism is found by the identification method.]]></description>
<pubDate>2019/4/24 14:24:49</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LU Xiang<sup>1,2</sup>, WANG Yashun<sup>1</sup>, CHEN Xun<sup>1</sup> and TAN Yuanyuan<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LU Xiang<sup>1,2</sup>, WANG Yashun<sup>1</sup>, CHEN Xun<sup>1</sup> and TAN Yuanyuan<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201902021]]></guid><cfi:id>12</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Determination method of dominant acoustic radiation modes in coupling enclosure]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201902023]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[At a certain frequency or in a band, one or several acoustic radiation modes which make a major contribution to the acoustic potential energy are defined as DARMs (dominant acoustic radiation modes) of coupling enclosure. The determination of DARMs is of virtual importance, and it directly affects the effect of active structural acoustic control. However, the current determination methods either one-sidedly emphasize the effect of radiation efficiency while ignoring the impact of modal amplitude, or require the knowledge of structural modes which was difficult to be extracted in engineering applications. To overcome these problems, comprehensively by the means of computation and testing, and fully considering both radiation efficiency and modal amplitude, a method based on “primary election-reservation-posteriori correction” was proposed to determine DARMs in coupling enclosure, and an experimental research was performed to verify the effectiveness and feasibility of the proposed method. Results show that the proposed method can accurately identify DARMs and does not require the knowledge of structural modes throughout the process, so it can be used to guide the selection of control objective or reconstruct the acoustic potential energy of coupling enclosure.]]></description>
<pubDate>2019/4/24 14:24:49</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[SU Changwei<sup>1,2</sup>, ZHU Haichao<sup>1</sup> and MAO Rongfu<sup>1</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>SU Changwei<sup>1,2</sup>, ZHU Haichao<sup>1</sup> and MAO Rongfu<sup>1</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201902023]]></guid><cfi:id>11</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis of failure mechanism on protective liquidcabin under warhead close explosion]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201902024]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to study the failure mechanism of large warship broadside protective liquid cabin, the scaled model of warhead and two kinds of liquid cabin structure, including exposure model and airtight model, were designed based on the bearing characteristics of the liquid cabin. The combined damage experiment of high-velocity fragment and shock wave under warhead close explosion, including two kinds of posture, were performed. According to the damage of liquid cabin model after test, the failure mechanism of front plate and back plate of liquid cabin under typical load was analyzed, and the failure mode and mechanism of liquid cabin structure was summarized and analyzed. The result shows that the high-velocity fragment is the main defensive object of protective liquid cabin, the drag and cavitation of fragment are the main stage of liquid cabin deformation and fracture, and the shock wave and cavitation squeezing pressure caused by penetration of fragment cluster into liquid cabin structure are the major load, which make structure deform and damage.]]></description>
<pubDate>2019/4/24 14:24:49</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[JIN Jian, HOU Hailiang, WU Fan, CHEN Pengyu, WU Linjie, ZHU Xi and CHEN Changhai]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>JIN Jian, HOU Hailiang, WU Fan, CHEN Pengyu, WU Linjie, ZHU Xi and CHEN Changhai</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201902024]]></guid><cfi:id>10</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Linear spectrum noise control of  electro-hydraulic steering gear with dual pump source]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201902025]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Electro-hydraulic steering gear system adopted variable frequency speed control strategy, has a characteristic of obvious linear spectrum noise, and it is difficult to attenuate with the changing working condition. Combined with the principle of the electro hydraulic steering mechanism of double redundancy pump source, a pressure ripple control strategy based on the auxiliary pump source confluence was proposed, and it only changed the control system. The theoretical analysis indicates that the pressure ripple of odd harmonics can be attenuated when the two pump sources rotate at the same speed, and the initial phase difference at half cycle. Thus, the master slave synchronization control strategy was adopted, and the corresponding hardware was configured. With the method applying to actual steering gear system, the structure vibration on the pedestal can reduce 3~5 dB, and the first order line spectrum can attenuate 23 dB.]]></description>
<pubDate>2019/4/24 14:24:49</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[CHEN Zongbin<sup>1,2</sup>, HE Lin<sup>1,2</sup>, LIAO Jian<sup>1,2</sup> and XU Rongwu<sup>1,2</sup>]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>CHEN Zongbin<sup>1,2</sup>, HE Lin<sup>1,2</sup>, LIAO Jian<sup>1,2</sup> and XU Rongwu<sup>1,2</sup></atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201902025]]></guid><cfi:id>9</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Fault isolation and parameter estimation of marine main power plant based on bicausal bond graphs]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201902026]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Aiming at the inherent characteristics of complicated structure, multiple fault types and system uncertainty of marine main power plant, a quantitative algorithm for fault isolation and parameter estimation based on bicausal BG (bond graph) was developed. Based on sensor configuration scheme, the system bicausal BG model was built. By analyzing the model causal path, the system ARRs (analytical redundancy relations) were derived and the fault signature matrix was obtained. The LFT (linear fractional transformation) BG model was developed for fault simulation. Through coupling LFT and bicausal BG models, the fault isolation and parameter estimation of marine main power plant were realized and the effectiveness was validated by MATLAB/Simulink software. Results show that the bicausalled BG helps to simplify ARRs deviation, and the fault isolation and parameter estimation can be effectively realized and the fault status can be tracked and predicted by analyzing the element constitutive equation of bicausalled BG.]]></description>
<pubDate>2019/4/24 14:24:49</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[HUANG Lin, CHENG Gang, ZHU Guoqing and CHEN Yutao]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>HUANG Lin, CHENG Gang, ZHU Guoqing and CHEN Yutao</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/201902026]]></guid><cfi:id>8</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Random vibration fatigue life prediction considering the effects of multi-axial stress and resonance]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202102014]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In calculating random fatigue life of structures in engineering at present, the stress life method based on the axial tension-compression fatigue life S-N(stress-number of cycles) curve is often used. Easy as it is to use, it often ignores not only the single-axis S-N curve, causing inaccurate reflection of the effect of multi-axial stress state, but also the resonance on the structure fatigue life in random vibration, as a result, the method in the prediction of fatigue life of structures under random vibration with actual life tends to have a larger error. The triaxial factor was introduced to reflect the multi-axial stress state of the structure under random vibration, and its expression in frequency domain was generalized. Based on this, the multi-axial vibration factor, a new random vibration fatigue damage parameter, was proposed. The new damage parameter not only considers the effect of multi-axial stress state and resonance on fatigue life under random vibration of the structure, but also has a simple form for engineering application. By using the new random vibration fatigue damage parameters, the multi-axis S-N curve for random vibration was obtained, and a new random vibration fatigue life prediction method was established. By predicting the random vibration fatigue life of 7075-T6 and LY12CZ aluminum alloy notch specimen, the results show that the method can accurately predict the fatigue life of two kinds of notch specimens under random vibration.]]></description>
<pubDate>2021/4/1 0:00:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[BAI Jin, LI Jing, QIU Yuanying, SHENG Ying, SUN Hong, WANG Haidong, WANG Zhaoxi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>BAI Jin, LI Jing, QIU Yuanying, SHENG Ying, SUN Hong, WANG Haidong, WANG Zhaoxi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202102014]]></guid><cfi:id>7</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Fast tool servo system of ultra-precision turning machine for microstructure arrays and its experimental study]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202102015]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[The microstucture arrays are widely used in the fields of LED lighting, liquid crystal display and optical instruments. Due to the tiny and complex structure and the high requirements of figure and surface quality, the study on the process technology of microstructures causes wide attention. A FTS (fast tool servo) device with the combination of piezoelectric ceramics actuator and flexible hinge holder was presented. The electro-mechanical coupled model of the FTS system was established and the effect of the system parameters on the system behaviors was investigated. The optimization of the structure parameters of flexible hinge holder was performed on the basis of the finite element simulation. The linearity of the output displacement of the tool was measured by laser displacement sensor. Finally, the microstructure of sinusoidal grids on the cylindrical surface of red copper was processed with the FTS and ultra-precision turning machine, and the machining results indicate that the designed FTS is able to accurately and effectively process the microstucture arrays with complex structure.]]></description>
<pubDate>2021/4/1 0:00:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[GUAN Chaoliang, LIU Junfeng, LI Fei, WANG Guilin]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>GUAN Chaoliang, LIU Junfeng, LI Fei, WANG Guilin</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202102015]]></guid><cfi:id>6</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Experiment on hydraulic low frequency vibration reaming process of drill rod inner hole]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202102016]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To completely remove oxide layer and crack layer on the inner surface of the hollow steel drill rod, deep hole reaming was processed on the inner hole of the drill rod. In view of the problems of chip discharge difficulty, high cutting temperature and poor processing quality of the inner hole surface during deep hole reaming, hydraulic low-frequency vibration assisted gun drill was adopted to improve the hole surface quality here. Experiments results showed that compared with the ordinary reaming, the hydraulic low-frequency vibration reaming can reduce the chip size and the jagged edge phenomenon on the chip surface, improve the inner hole machining surface, reduce the tool marks and scratches and the processing temperature under the condition of the speed of 500 r/min and the feed rate of 0.1 mm/r. Furthermore, Furthermore, the minimal clip size with least scratches and lowest processing temperature could be achieved when the frequency reaches 36.7 Hz with vibration amplitude at 0.58 mm. With the increase of the feed rate within the range of 0.80~0.12 mm/r, the length of chip becomes larger, and the tool marks and scratches on the surface of the inner hole increase. The speed has little effect on the chip length and the surface quality of the inner hole.]]></description>
<pubDate>2021/4/1 15:04:09</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[XU Linhong, LIU Zhifan, GAO Shang, RAO Jianhua]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Linhong, LIU Zhifan, GAO Shang, RAO Jianhua</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202102016]]></guid><cfi:id>5</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Weighted stochastic simulation for time-variant reliability analysis]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202102017]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to solve the problem of high cost of structural time-variant reliability analysis, a time-variant reliability analysis strategy based on weighted stochastic simulation was proposed. Time-variant reliability analysis needs to calculate the failure probability of structure with respect to different times, which often requires multiple reliability analyses, involving hugh calculation cost. The proposed method improves and expands the conventional stochastic simulation method which is used to analyze the static reliability problem. The weighted Monte Carlo method and weighted importance sampling method respectively are developed respectively by using the weighting strategy to efficiently analyze and calculate the time-variant reliability problem. The proposed methods require only one conventional reliability analysis simulation to obtain the estimator of time-variant failure probability function. Two examples, a tubular cantilever beam and a ten-bar truss, are used for verification. Results show that the weighted methods can greatly ease the computational burden and improve the computational efficiency while ensuring the precision.]]></description>
<pubDate>2021/4/1 15:04:09</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[YUAN Xiukai, ZHENG Zhenxuan, LUO Dongxiu]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YUAN Xiukai, ZHENG Zhenxuan, LUO Dongxiu</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202102017]]></guid><cfi:id>4</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Load sharing characteristics of dual-input torque-spilt gear system considering stiffness]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202102018]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to carry out a more in-depth study on the load sharing characteristics of the torque-split gear system, a nonlinear dynamic model was established. The numerical simulation method was used to calculate the load sharing coefficient of the system. The influences of the torsional stiffness of the linkage shaft, the output shaft support stiffness, the input speed and the axial angle on the load sharing coefficient were studied. Experiment of gear system was carried out, and the research results show that:the load sharing coefficient of the output end is larger than the one of the input end, and the load sharing coefficient of the high pressure input end is larger than the one of the low pressure input end; the load sharing coefficient grows with the increase of the torsional stiffness of the linkage axis; with the increase of the support stiffness, the load sharing coefficient increases first and then reduces; the load sharing coefficient shows fluctuations with the growth of input speed, and the resonance peak appears in the range from 4 100 r/min to 4 400 r/min; the value of shaft position angle a<sub>2</sub> can affect the change law of the load sharing coefficient with a<sub>1</sub>, and minimizing the shaft position angle can improve the load sharing performance of the system. Experimental results verify the correctness of the model of marine gear system.]]></description>
<pubDate>2021/4/1 15:04:09</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WEI Wei, GUO Wenyong, HAN Jianggui, YU Pingbo]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WEI Wei, GUO Wenyong, HAN Jianggui, YU Pingbo</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202102018]]></guid><cfi:id>3</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Projection characteristics of axial prefabricated fragments driven by cylindrical charge]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202102019]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[In order to improve the lethality of the axial direction fragment field of the warhead, experimental and numerical studies were conducted to investigate the maximum velocity and ejection angle distribution characteristics of axial prefabricated fragments driven by caseless cylindrical TNT charge. The LS-DYNA software was used to numerically simulate the process of prefabricated fragments driven by the charge, and the flying process of the prefabricated fragments group was described. The theoretical calculation formula of the overall plate driven by the charge was improved to obtain the maximum initial velocity of the prefabricated fragments. Results indicated that close agreement was found between numerical, experimental and theoretical results for the maximum velocity of prefabricated fragments. With the increase of the distance from the central of TNT charge for fragments, the initial velocity and radial ejection angle decreased and increased respectively, while the circumferential ejection angle of fragments varying on a very small scale. According to the experimentally measured data and theoretical analysis, the maximum initial velocity of prefabricated fragment in the central area exceeded 2500 m/s, the maximum ejection angle in the radial direction was about 22°, and the mean value of ejection angle in the circumferential direction was less than 5°.]]></description>
<pubDate>2021/4/1 15:04:09</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[LI Mao, GAO Shengzhi, HOU Hailiang, LI Dian, ZHENG Hongwei, LI Yongqing, ZHU Xi]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>LI Mao, GAO Shengzhi, HOU Hailiang, LI Dian, ZHENG Hongwei, LI Yongqing, ZHU Xi</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202102019]]></guid><cfi:id>2</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Analysis and application of explosion field characteristics of new mine clearance charge]]></title>
<link><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202102020]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Based on the principle of the function of mine clearance by the way of blasting tube, the 8.2 kg solid-state FAE(fuel air explosive) mine clearance device was designed. By changing the initial explosive position and the method of setting up, in the multiple field near ground explosion tests, the stress tests were conducted by adopting reflection pressure sensor to test forward and lateral pressure from different explosive locations, at the same time a certain type of anti-infantry mines in the corresponding burst position of the forward line pressure sensor was set, and the explosive parameters in different location′s explosive field and the scope of anti-infantry′s mines clearance was obtained. Results show that the clearance range of the horizontal charge was significantly larger than that of the vertical charge, and the optimal blast height was about 0.60 m. Moreover, the acting time curve of the positive pressure zone of the explosion field is of “V” type, and the acting range of the product is up to 63 times of the charging radius, which has obvious advantages over the acting time of equivalent TNT. The mine clearance range of this device is about 1.8~3.85 times of the current mine clearance range of blasting tube blasting, the forward reliable mine clearance range can be 77 times of the charging radius, and the side can be 69 times. Since the positive pressure action time of the explosive zone is significantly longer, so it is beneficial to the clearance of all kinds of mines, and it is a potentially efficient humanitarian mine-clearing charge.]]></description>
<pubDate>2021/4/1 0:00:00</pubDate>
<category><![CDATA[Mechanical Engineering]]></category>
<author><![CDATA[WU Kegang, WANG Bo]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WU Kegang, WANG Bo</atom:name>
</atom:author>
<guid><![CDATA[http://journal.nudt.edu.cn/gfkjdxxben/article/abstract/202102020]]></guid><cfi:id>1</cfi:id><cfi:read>true</cfi:read></item>
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