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Chief Editor: Xiang Li

ISSN:1001-2486

C N: 43-1067/T

Supervisory Organization:National University of Defense Technology

Organizing Unit:Teaching and Research Support Center of the National University of Defense Technology

Publication Cycle: Bimonthly

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    • Review of green shop scheduling problem

      GAO Liang; YU Fei; LU Chao
      doi:10.11887/j.cn.202502001    2025,47(2):1-23

      Abstract:With the vigorous development of the manufacturing industry, the problems such as environmental pollution an resource shortage have gradually become prominent, seriously affecting the sustainable development of society. Therefore, the transformation of manufacturing energy saving and carbon reduction is an inevitable requirement for global green and lowcarbon development. As one of the most important parts of the manufacturing systems, production scheduling can realize efficient and green operation of the manufacturing systems through the reasonable allocation of resources. Under the context of green manufacturing, the research of green shop scheduling problem has become a hot spot in the field of production scheduling. Therefore, a systematic review of the existing research since 2018 from the aspects of the green parallel machine scheduling problem, the green flow shop scheduling problem, the green job shop scheduling problem, the green flexible job shop scheduling problem, and the green distributed shop scheduling problem was conducted, the shortcomings of the existing research was summed up, and the direction of future research was pointed out.

    • Robotic parallel disassembly sequence planning method based on reinforcement learning and genetic algorithm

      WANG Kaipu; MA Xiaoyi; LU Chao; YIN Lüjiang; LI Xinyu
      doi:10.11887/j.cn.202502002    2025,47(2):24-34

      Abstract:To improve the disassembly efficiency and reduce disassembly energy consumption, the robotic parallel disassembly mode was introduced in the disassembly sequence planning problem, a robotic parallel disassembly sequence planning model was constructed, and a genetic algorithm based on reinforcement learning was designed. To verify the correctness of the model, a mixed integer linear programming model was constructed. In the algorithm, a goal-oriented encoding and decoding strategy was constructed to improve the quality of the initial solution.Q learning was used to select the best crossover and mutation strategies in the iteration process to enhance the algorithms adaptability. Finally, in an engine disassembly case with 34 tasks, the superiority of the proposed algorithm was verified by comparing with four classic multi-objective algorithms. The analysis of the disassembly schemes shows that the robotic parallel disassembly mode can effectively shorten the completion time and reduce disassembly energy consumption.

    • Improved co-evolutionary algorithm for solving many-objective cloud workflow scheduling problem

      ZHOU Jiajun; JI Xiaohui; LU Chao; GAO Liang
      doi:10.11887/j.cn.202502003    2025,47(2):35-48

      Abstract:Most current studies formulate the cloud workflow scheduling as a single-objective or multi-objective optimization problem with at most three objectives, which is unable to fully meet practical scenarios′ needs. To address the limitations above, many-objective cloud workflow scheduling model was established, where many indicators such as time, cost, reliability, resource consumption, load balancing, were taken into account. Then, an improved co-evolutionary algorithm was introduced to address this problem, where dual-stage search strategy and multi-indicator cooperation mechanism were employed to effectively balance the convergence and diversity of solution set, so as to enhance the search capability of algorithm. Experiments on seven types of real life workflow instances reveal that our proposal outperforms the existing peers and can find better scheduling schemes in most cases.

    • Curriculum reinforcement learning algorithm for flexible job shop scheduling problems

      LU Chao; XIAO Yang; ZHANG Biao; GAO Liang
      doi:10.11887/j.cn.202502004    2025,47(2):49-59

      Abstract:To address the issue of the lack of generalization capability of deep reinforcement learning in flexible job shop scheduling problems, a method combining curriculum learning and deep reinforcement learning was proposed. The training instance difficulty was dynamically adjusted, with an emphasis on enhancing the training of the most difficult instances, to adapt to different data distributions and avoid the forgetting problem during the learning process. Simulation test results demonstrate that the algorithm maintained decent performance on large-scale untrained problems and benchmark datasets. It achieves better performance on four large-scale untrained problems with two artificial distributions. Compared to exact methods and metaheuristic methods, for problem instances with larger computational complexity, it could rapidly obtain solutions of decent quality. Moreover, the algorithm can adapt to flexible job shop scheduling problems with different data distributions, exhibiting a relatively fast convergence speed and good generalization capability.

    • Fault detection and isolation method for launch vehicleattitude control system  based on multiple models

      XIE Changlin; CHENG Yuqiang; YANG Shuming; SONG Lijun
      doi:10.11887/j.cn.202502005    2025,47(2):60-67

      Abstract:Aiming at the problem of complex structure and high fault occurrence in the attitude control system of launch vehicle, a multiple model fault detection and isolation algorithm was proposed. The small deviation attitude dynamics model of the launch vehicle was established, and the Kalman filter of the system was designed. Combined with the idea of special observer, multiple Kalman filter banks with different structures were used to generate corresponding residuals, so that a single residual was only sensitive to a fault of the sensor or actuator. The fault isolation strategy was deduced theoretically to achieve the detection and isolation of different fault types of the launch vehicle. Simulation analysis shows that when no fault occurs, the residual results do not exceed the set threshold, and the algorithm does not alarm; when the sensor or actuator fails, the proposed isolation strategy can accurately locate the fault, which verifies the effectiveness of the algorithm.

    • Effect of normal overload on convective heat transfer process of working fluid in airborne thermoelectric conversion system

      YANG Xuan; WANG Zhongwei; NIU Yaobin
      doi:10.11887/j.cn.202502006    2025,47(2):68-77

      Abstract:To grasp the effect of normal overload on the airborne thermoelectric conversion system, the convective heat transfer process of working fluid in heat exchange ducts was simulated on the basis of the computational fluid dynamics software. Results show that the growth of normal overload makes the flow field structure inside the pipeline changed, which finally leads to the gradually decreasing wall temperature. Along the duct, the formation of one wall temperature peak of the heat absorption channel is closely related to the change of turbulent heat flux near the heated wall. When the normal overload increases from 0g to 2g, the flow structure at the front end of the heat absorption channel changes from 8 vortexes converts to the two main vortexes structure and the influence of secondary flow is gradually increasing, the formation of the two main vortexes makes turbulent heat flux of fluid near the heated wall increases gradually due to the thinner temperature boundary layer. Hence, local heat transfer coefficient can be increased by 80%. With the enhancement of heat transfer in duct, the wall temperature of the heat absorption channel decreases and the maximum of wall temperature drop can be up to 290 K.

    • Station keeping control method based on deep reinforcement learning for aerostat using ambient wind

      BAI Fangchao; YANG Xixiang; DENG Xiaolong; LONG Yuan; HOU Zhongxi
      doi:10.11887/j.cn.202502007    2025,47(2):78-88

      Abstract:Aiming at the station keeping control problem of stratospheric aerostat in dynamic wind field, a station keeping controller designed based on deep reinforcement learning D3QN algorithm for different control channels of aerostat operated with ambient wind, studied the impact of different reward functions on the performance of regional resident controllers. Station keeping control simulation was carried out under the task constraint of a station keeping duration of three days and a station keeping radius of 50 km. Results show that: compared with the station keeping controller designed by DDQN method, the performance of the controller designed by D3QN method is significantly improved. When the control trajectory of aerosat is only adjusted by altitude, the average station keeping radius can reach 25.26 km, and the station keeping ratio is 96-25%. With the aid of horizontal propulsion, the average station keeping radius can be significantly reduced and the station keeping time ratio can be significantly increased. At the same time, the strong robustness of the station keeping controller based on deep reinforcement learning was verified, and the controller can be designed with different reward functions to meet the requirements of different station keeping tasks.

    • Local shape optimization design of super-pressure balloon under bidirectional tension

      ZHANG Taihua; QIAN Hang; ZHANG Donghui
      doi:10.11887/j.cn.202502008    2025,47(2):89-97

      Abstract:In order to solve the problem that the super-pressure balloon in the near space tandem balloon system being subjected to special boundary and load conditions, a method for optimizing the local shape of the two poles of spherical super-pressure balloons under bidirectional tension based on the natural shape equations was proposed. Through the smooth connection of the numerical solution generatrix segment and the arc generatrix segment, the complete generatrix of super-pressure balloon with a certain angle at two poles was obtained, which was symmetrical up and down. The stress distributions of the super-pressure balloons before and after the local shape optimization were analyzed by the finite element method, and the effectiveness of the local balloon shape optimization method was verified. On this basis, the key factors affecting the effectiveness of local balloon shape optimization were analyzed, including the arc length of the numerical solution generatrix segment, circumferential stress input condition, local shape, and the radius of the arc generatrix segment, providing an important reference for the selection of key parameters in the local shape optimization of spherical super-pressure balloon.

    • Keypoints detection and uncertainty synchronous prediction for satellite monocular pose estimation

      SU Ang; WANG Zi; WANG Jinghao; LI Zhang
      doi:10.11887/j.cn.202502009    2025,47(2):98-108

      Abstract:Satellite monocular pose estimation usually extracts the keypoints of the satellite in the images, and then solves the PnP (perspective-n-points) problem to obtain the relative position and attitude between the camera and the satellite, in which the accuracy of satellite keypoints detection is the key to determine the accuracy of monocular pose estimation. To solve this problem, a high-precision satellite keypoints detection method was proposed, which predicted the image coordinates of the keypoints and gave the uncertainty of keypoints coordinate prediction synchronously. Then, a weighted PnP constraint equation was constructed to solve the relative position and attitude on this basis, which significantly improved the accuracy of satellite monocular pose estimation. Relevant experiments were carried out on the public satellite monocular pose estimation dataset named SPEED. The experimental results show that the proposed keypoints detection method for synchronously predicting keypoints coordinates and their uncertainty can significantly improve the accuracy of satellite keypoints detection,and by solving the weighted monocular pose estimation problem, the accuracy of satellite monocular pose estimation has been significantly improved.

    • Coupling analysis of thermodynamic environment for air-to-air missile

      XU Shinan; XU Liyou
      doi:10.11887/j.cn.202502010    2025,47(2):109-119

      Abstract:With regard to accurately predicting thermodynamic environment for air-to-air missile, fluid-thermal-solid coupling analysis should be adopted, and coupling effects on flow field and structure-temperature field should be investigated. A fluid-thermal-solid multi-field coupling simulation model for air-to-air missile was established via using partition algorithm, and the coupling relationships among missile structural deformation, temperature and pressure were analyzed and the coupling effects on temperature and pressure simulation results were examined as well. Results show that, missile bending deformation is caused by aerodynamic and aerothermal, and the structure deformation could lead to the variation of missile temperature field and pressure field. The main reason for the variation is induced by the structure deformation from aerodynamic effect. The predicting accuracy of missile thermodynamic environment can be affected by the coupling effects. If the missile slenderness ratio or the angle of attack is small, or the flight speed is low, the coupling effects have a little influence on thermodynamic environment for supersonic missile. If the missile slenderness ratio and the angle of attack are large, and the flight speed is high, high predicting accuracy can be obtained by considering coupling effects.

    • Design and verification of the improved optimal guidance law for boost-glide missile

      FAN Xiaoshuai; BAI Xibin; JIANG Zhenyu; ZHANG Shifeng
      doi:10.11887/j.cn.202502011    2025,47(2):120-130

      Abstract:The boost-glide missile is a kind of precision guided weapons, which flies in complex and changeable flight conditions with high requirements for the guidance law. The flight state variation model of the missile was established, the improved optimal guidance law with the impact angle constraint was derived by the optimal control method, and the longitudinal guidance coefficients and lateral guidance coefficients were introduced into the guidance law. The influence of single guidance coefficient on guidance precision was analyzed and the selection method of guidance coefficients was determined. The influence of fixed impact angle constraint and dynamic impact angle constraint on guidance precision were analyzed according to the requirements of different flight missions. The numerical simulation and the hardware-in-the-loop simulation were finished with a small solid propellant boost-glide test vehicle. Simulated results show that the improved optimal guidance law is reasonable with high guidance precision.

    • Design and analysis of hybrid cabin assembly attitude adjustment robot system

      LIU Yi; YAO Jiantao; GUO Yutong; YI Wangmin; ZHAO Yongsheng
      doi:10.11887/j.cn.202502012    2025,47(2):131-145

      Abstract:In order to meet the requirements of automatic assembly of equipment in the spacecraft cabin and obtain an assembly robot with small structure size, large workspace, high load capacity and high flexibility, a lightweight, high-load 8-DOF hybrid attitude adjustment robot cabin assembly system based on PRR/PR(PRR) R mechanism was proposed. By analyzing the position mapping relationship, velocity mapping relationship, Jacobian matrix and acceleration mapping relationship of the hybrid assembly robot, the dynamic model of the hybrid assembly robot was established, and the mapping relationship between the driving force, driving torque and joint speed was obtained. Furthermore, the stiffness model of the hybrid robot was established to solve the deformation degree of the mechanism after six dimensional force was applied to the end of the mechanism. ADAMS and ANSYS simulation models verify the kinematic, dynamic and theoretical stiffness models of the mechanism. It provides a feasible scheme and theoretical basis for the realization of large equipment assembly automation in a narrow and long space.

    • Load-balanced deadlock resolution algorithm in multi-chiplet network

      ZHOU Hongwei; CHEN Zhiqiang; ZENG Kun; DENG Rangyu
      doi:10.11887/j.cn.202502013    2025,47(2):146-154

      Abstract:To solve the inter-chiplet deadlock and network connectivity problems caused by link failures in multi-chiplet network, an optimized packet retransmission mechanism for multi-chiplet network was proposed. By using the “message merging” function in the retransmission mechanism, the number of control packets and the network load was reduced. By using the “message forwarding” function and adopting the forwarding to neighbor strategy, the fault-tolerant cost of the inter-chiplet network link failure was reduced. And more balanced load of the intra-chiplet network was realized. The simulation results show that the proposed method can increase the saturation bandwidth by 12-5%~25% with similar latency compared with the turn restriction strategy. Furthermore, it can increase the saturation bandwidth by up to 50% in case of link failures. “Message merging” can effectively reduce the number of control packets, thus reduce the overall load of the network. “Packet forwarding” has lower fault-tolerance cost and can achieve more balanced load of intra-chiplet network.

    • Specific accelerator architecture conforming to particle transport simulation

      ZHANG Jianmin; LIU Jinjin; XU Weikang; LI Tiejun
      doi:10.11887/j.cn.202502014    2025,47(2):155-164

      Abstract:Particle transport simulation is one of the main applications of high performance computers. But facing to its fast growing compute requirements, the general-purpose microprocessors cannot adapt to the particle transport program features, owing to the complexity architecture of its single core, and then it is difficult to obtain high ratio of performance and power. Therefore, the program features of the particle transport non-deterministic numerical simulation were extracted and analyzed. Based on the characteristics of the algorithm, the architecture of open-source microprocessor core was designed, including pipeline structure, branch prediction unit, multi-level Cache hierarchy and main memory design. A specific accelerator architecture was designed in accordance to the particle transport program features. The simulation results of running the particle transport program on the general architecture simulator show that, as compared with ARM Cortex-A15, the proposed specific accelerator can achieve 4.6 times performance improvement under the same power consumption, and 3.2 times under the same area.

    • Filling and repairing holes in geometric model for scientific engineering computing

      LIU Zengsheng; GAO Xiang; ZHANG Xiang; XU Chuanfu; GONG Chunye
      doi:10.11887/j.cn.202502015    2025,47(2):165-172

      Abstract:In the process of geometric model processing by mesh generation software, a filling method based on B-spline surface was proposed to solve the hole problem caused by missing geometric surface information. The hole boundaries were extracted from the given set of B-spline curves based on their topological relationship, and curve approximation fitting and combination techniques were employed to process the curves within individual holes to obtain compatible curves. Hole repair was achieved by first constructing unidirectional interpolating ruled surfaces and tensor product surfaces from the curves, these surfaces were then combined through interpolation and Boolean sum operations to generate bilinear difference B-spline surfaces for filling the holes. In addition, the ruled surface was applied as an alternate method in complex special holes to ensure the overall robustness of the method. Experimental results show that the method is highly general and can be applied to the dirty geometry repair of various types of morphological holes in real-world industrial geometric models, providing clean and closed geometric models for subsequent mesh generation.

    • Image anomaly detection algorithm using multi-level feature fusion network

      TANG Jun; ZUO Jinmei; WANG Ke; ZHANG Yan; WANG Nian
      doi:10.11887/j.cn.202502016    2025,47(2):173-182

      Abstract:Image anomaly detection aims to identify and locate the abnormal region in an image. To address the issue on the insufficient utilization of different-level feature information in the existing methods, an image anomaly detection method based on multi-level feature fusion network was put forward. By using the pseudo anomaly data generation algorithm incorporated with the anomaly prior knowledge, the anomaly data of the training set were augmented, and then the anomaly detection task was transformed into a supervised learning task. A multi-level feature fusion network was constructed to enriches the low-level texture information and high-level semantic information of features by fusing the different levels of features in the neural network, which could make the features used for anomaly detection more discriminative. In the training phase, the score constraint loss and the consistency constraint loss were designed and combined with the feature constraint loss to train the whole network model. Experimental results on the MVTec dataset showed that the proposed model could achieve 98.7% AUROC (area under the receiver operating characteristic) mean value in the detection task, 97.9% AUROC mean value in the pixel-wise localization task and 94.2% mean value of per-region-overlap in the localization task, which outperformed several existing anomaly detection approaches.

    • MBSE modeling and reliability evaluation method for complex system

      LI Zihang; WANG Guoxin; MA Junda; LU Jinzhi; YAN Yan
      doi:10.11887/j.cn.202502017    2025,47(2):183-192

      Abstract:To solve the problem of lack of early reliability evaluation in complex system design process, a MBSE (model-based system engineering) method was proposed to support the design and reliability evaluation of complex systems. With the characteristics of complex system development, a MBSE modeling method based on MOFLP-R(mission, operation, function, logic, physics and reliability) was proposed to support design and reliability assessment of complex system. KARMA, a system modeling language based on GOPPRR(graph, object, property, point, relationship and role), was used to express the MOFLP-R process. Then, in order to evaluate the reliability of the complex system, the code generation was used to map the diagram to the numerical model. Finally, the method was applied to a hydraulic system case and the results showed that the proposed method is effective for complex system design and evaluation.

    • Design and verification of three-dimensional spatial location deployment method for unmanned aerial vehicle base station

      LI Peng; CAO Jiang; PING Yang; LIANG Dongchen
      doi:10.11887/j.cn.202502018    2025,47(2):193-201

      Abstract:In order to overcome the problems of high computational complexity and long simulation cycle caused by the characteristics of strong dynamics, high timeliness, multiple constraints, and strong coupling during the three-dimensional spatial deployment of UAV-BS(unmanned aerial vehicle base station), an EGO(efficient global optimization) algorithm was proposed to determine the three-dimensional spatial deployment location of UAV-BS. Considering that the EGO algorithm mainly obtains new sampling points by optimizing the EI(expectation improvement) function, the improved DE(differential evolution) algorithm was proposed to optimize the EI function. The improved DE algorithm improves the optimization ability and convergence speed by adopting the successful parent selecting framework and the offspring generation strategy self-adaptive selection framework. Three typical engineering problems were selected to test the performance of the improved EGO algorithm. The results show that the optimization ability, optimization speed, and stability of the improved EGO algorithm are significantly improved. On this basis, an application example of using the improved EGO algorithm to deploy a UAV base station in three-dimensional space was given.

    • Radar echo characteristic analysis and parameter estimation method for rotor UAV

      LIU Lutao; XIE Liangzheng; MO Yuhan
      doi:10.11887/j.cn.202502019    2025,47(2):202-211

      Abstract:The proliferation of “low, slow and small” UAVs (unmanned aerial vehicles) poses a serious threat to flight safety in airspace. Accurate analysis of the characteristics of UAV echo signals is of great significance for the detection of non-cooperative UAVs. Based on the time-domain integral echo model of rotor UAV target and the principle of cepstrum algorithm, the frequency-domain expression and cepstrum expression of echo signal were derived, the corresponding relationship between echo signal parameters and frequency-domain and cepstrum characteristics was analyzed, and a parameter estimation method for UAV echo signal was proposed, and the effectiveness of this method was verified by simulation and measured data. The results show that, it can estimate the bandwidth and rotation frequency of UAV echo signal more accurately and provide an important reference for target detection and recognition of UAV.

    • Sparse direction finding for GNSS spoofing source in underdetermined scenarios

      ZHAO Yuqing; SHEN Feng; XU Dingjie; MENG Zhen
      doi:10.11887/j.cn.202502020    2025,47(2):212-218

      Abstract:Aiming at the problem that the traditional subspace-like direction finding algorithm fails in underdetermined scenarios and requires the number of signal sources as a priori information, a GNSS spoofing source direction finding method based on coprime array was proposed to improve the application security of satellite navigation receivers in spoofing environment. The cyclic correlation matrix was constructed to reduce the impact of noise on the performance of the coprime array signal processing, and the virtual domain equivalent array signal was obtained by vectoring the cyclic correlation matrix. On this basis, an optimization problem based on sparse signal reconstruction in virtual domain was designed to achieve high-precision, multi-degree of freedom direction finding for sources by minimizing the fitting error. Simulation results show that compared with traditional subspace algorithm, the proposed algorithm has higher estimation accuracy, and the direction finding results are still reliable under the case of underdetermined.

    • Improved fast sparse Bayesian learning algorithm for underwater acoustic channel estimation

      JIA Shuyang; ZOU Sichen; LIU Baoheng; ZHANG Xiaochuan; DA Lianglong
      doi:10.11887/j.cn.202502021    2025,47(2):219-226

      Abstract:In order to guarantee the long-term stable communication of underwater devices, the IFM-SBL(sparse Bayesian learning based on improved fast marginal likelihood maximization) algorithm was proposed to estimate underwater acoustic channels with low complexity and high performance. Especially in the case of low SNR(signal-to-noise ratio), the performance of proposed algorithm can be further improved by threshold denoising and discrete Fourier transform denoising. Simulation and sea trial results show the output bite error rate after channel estimation of IFM-SBL is similar to that of EM-SBL(sparse Bayesian learning based on expectation maximization), and it has good robustness in both low SNR and fast or slow time-varying channels. The running speed of FM-SBL and IFM-SBL algorithm is 90% better than that of EM-SBL algorithm, which greatly reduces the estimation time.

    • Coating damage detection of vessels using corrosion electric field

      HU Yucheng; WANG Xiangjun; LIU Wuqiang; WANG Shichuan; LIU Yi
      doi:10.11887/j.cn.202502022    2025,47(2):227-238

      Abstract:The corrosion electric field signal of ships has characteristics such as low frequency and difficulty in elimination, and it is a kind of physical field feature of ships with obvious line spectrum characteristics. Ships with different coating damage areas have distinct electric field distribution characteristics, and the corrosion electric field signal can be utilized to detect the coating damage location of ships. Therefore, a detection method combining RCHFRDE(refined composite hierarchical fluctuation revise dispersion entropy) and IHHO-KELM(improved Harris Hawk optimization-kernel based extreme learning machine) was proposed. RCHFRDE was used to extract the feature information of the corrosion electric field signal, which was then input into IHHO-KELM for training to detect the coating damage area. The effectiveness and reliability of the proposed method were verified through simulation experiments and scale model experiments of ships. The experimental results show that this method can effectively predict the single damage area of the ships coating. The detection accuracy rates of simulation data and measurement data reach 94-67% and 89-00% respectively. It can be used as an effective supplement to non-contact detection methods in cases with less prior environmental information.

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    • Review of green shop scheduling problem

      GAO Liang; YU Fei; LU Chao
      GAO Liang; YU Fei; LU Chao.Review of green shop scheduling problem[J].国防科技大学学报,2025,47(2):1-23

      AbstractWith the vigorous development of the manufacturing industry, the problems such as environmental pollution an resource shortage have gradually become prominent, seriously affecting the sustainable development of society. Therefore, the transformation of manufacturing energy saving and carbon reduction is an inevitable requirement for global green and lowcarbon development. As one of the most important parts of the manufacturing systems, production scheduling can realize efficient and green operation of the manufacturing systems through the reasonable allocation of resources. Under the context of green manufacturing, the research of green shop scheduling problem has become a hot spot in the field of production scheduling. Therefore, a systematic review of the existing research since 2018 from the aspects of the green parallel machine scheduling problem, the green flow shop scheduling problem, the green job shop scheduling problem, the green flexible job shop scheduling problem, and the green distributed shop scheduling problem was conducted, the shortcomings of the existing research was summed up, and the direction of future research was pointed out.

      Abstract (404) HTML (347) PDF (821.09 K) (463)
    • Progress and development trend of composite solid propellant constitutive model research

      XU Yihang; LI Daokui; ZHOU Shiming
      XU Yihang; LI Daokui; ZHOU Shiming.Progress and development trend of composite solid propellant constitutive model research[J].国防科技大学学报,2025,47(1):1-22

      AbstractAs an important energy source of solid rocket motors, the mechanical properties of composite solid propellants have always been the focus of attention in the engineering field. The macroscopic constitutive model and the fine-scale mechanical model in the characterisation of propellant mechanical properties was focused on. The development of the two types of models was systematically sorted out. The differences between the models were clarified. The applicable conditions of various models were pointed out. The difficulties and challenges of macro and fine mechanical models in the characterisation of propellant mechanical properties at the present stage were analysed. The proposal of mechanical models represented by cross-scale mechanical models will help to solve the problem of propellant mechanical property characterisation. The key in the future modelling of propellant mechanical characterization is the experimental research under complex conditions, focusing on the development of high precision and high performance multiscale numerical computation methods, as well as the integration of data-driven technology represented by artificial intelligence technology into model innovation.

      Abstract (947) HTML (729) PDF (6.61 M) (991)
    • Review and prospect of emitter manufacturing technology for ionic liquid electrospray thruster

      LI Xiaokang; GUO Dawei; WU Jianjun; YANG Yuntian; CHE Bixuan
      LI Xiaokang; GUO Dawei; WU Jianjun; YANG Yuntian; CHE Bixuan.Review and prospect of emitter manufacturing technology for ionic liquid electrospray thruster[J].国防科技大学学报,2025,47(1):67-82

      AbstractILET(ionic liquid electrospray thruster), one of the electrostatic micro-thrusters, has recently become a hot topic for researchers. The emitter is the core component that significantly affects the thruster performance, so its manufacturing is considered as one of the key technologies for the ILET development. Combined with the operating principle and the development history of ILET, the characteristics of propellant transport and manufacturing requirements for all three types of emitters, namely capillary, externally-fed and porous emitters, were analyzed. Based on this, the typical manufacturing materials and related manufacturing technologies were reviewed, while the advantages and disadvantages of different manufacturing technologies such as ion etching were summarized and remarked. For the proven manufacturing method of ultrafast laser ablation based on porous material, the development suggestions including emitter design, novel material fabrication, and study on laser-matter interaction mechanism were given.

      Abstract (380) HTML (227) PDF (12.27 M) (818)
    • Review of key technologies for autonomous homing of parafoil systems

      SUN Qinglin; YANG Jinshan; SUN Hao; CHEN Zengqiang
      SUN Qinglin; YANG Jinshan; SUN Hao; CHEN Zengqiang.Review of key technologies for autonomous homing of parafoil systems[J].国防科技大学学报,2024,46(4):1-15

      AbstractIn order to explore the key technologies of parafoil systems, including modeling, trajectory planning, and trajectory tracking control, to support their autonomous homing in wide application prospects in large-scale equipment airdrop replenishment, carrier rocket booster recovery, and natural disaster rescue applications. Through research on the development of parafoil systems both domestically and internationally, a comparative analysis and summary of the basic principles, commonly used methods, and cutting-edge technologies of the three key technologies were conducted, with a focus on the flexible modeling technology of parafoil systems in complex environments, trajectory planning technology in obstacle spaces, and trajectory tracking technology based on intelligent control strategies. A summary and outlook were made on the future development trends of key technologies for autonomous homing of parafoil systems, which can help researchers gain a comprehensive understanding of the research progress and development trends in autonomous homing of parafoil systems, and provide inspiration and reference value for further research in this area.

      Abstract (3645) HTML (541) PDF (15.58 M) (2393)
    • Survey on dynamics and control problem research in spacecraft orbital pursuit-evasion game

      ZHU Yanwei; ZHANG Chengming; YANG Fuyunxiang; YANG Leping
      ZHU Yanwei; ZHANG Chengming; YANG Fuyunxiang; YANG Leping.Survey on dynamics and control problem research in spacecraft orbital pursuit-evasion game[J].国防科技大学学报,2024,46(3):1-11

      AbstractWith the rapid development of spacecraft rendezvous and proximity operation technology, the problem of orbital pursuit-evasion has gradually become a research hotspot in the aerospace field. From the perspective of dynamics and control, the research status of spacecraft orbital pursuit-evasion was reviewed. General form of the orbital pursuit-evasion problem model based on quantitative differential games was given, and various types of orbital pursuit-evasion problems were systematically sorted out. For the solution of pursuit and escape strategies, the advantages and disadvantages of various methods were analyzed for closed-loop strategy and open-loop strategy. Focusing on the combination of artificial intelligence algorithm and orbital pursuit and escape problem, the research status of orbital pursuit and escape strategy based on deep neural network and reinforcement learning was expounded. Regarding future prospects, development directions has been proposed, including the pursuit-evasion game situation analysis, the multi-spacecraft game control, the game dynamics and control under three-body problem.

      Abstract (4087) HTML (552) PDF (7.94 M) (3167)
    • Analysis of the current research on the flying-wing aircraft

      CHEN Qingyang; XIN Hongbo; WANG Peng; ZHU Bingjie; WANG Yujie; LU Yafei
      CHEN Qingyang; XIN Hongbo; WANG Peng; ZHU Bingjie; WANG Yujie; LU Yafei.Analysis of the current research on the flying-wing aircraft[J].国防科技大学学报,2024,46(3):39-58

      AbstractThe development trajectory of the flying-wing aircraft was sorted out, encompassing the early evolutionary history to the current state of research, along with contemplation and forecasts regarding future directions. Meanwhile, several key control challenges associated with flying-wing aircraft were discussed, including attitude control in a wide-speed domain under nonlinear conditions, high-precision autonomous take off and landing control under multiple effect coupling, robust control issues with approximate aerodynamic models and under strong disturbances, as well as control allocation problems arising from multi-surface redundancy. Moreover, the discussion on flow control issues that were currently a focal point in flying-wing aircraft research were discussed in depth. The following research trend of active flow control technology was expounded.

      Abstract (3444) HTML (598) PDF (14.51 M) (2704)
    • Current status and trends of drag-free technology for space-based gravitational wave detection

      ZHANG Jinxiu; TAO Wenjian; LIAN Xiaobin; WANG Jihe; MENG Yunhe; LIU Yuan
      ZHANG Jinxiu; TAO Wenjian; LIAN Xiaobin; WANG Jihe; MENG Yunhe; LIU Yuan.Current status and trends of drag-free technology for space-based gravitational wave detection[J].国防科技大学学报,2024,46(2):1-17

      AbstractThe drag-free control of the spacecraft is one of the key technologies to realize the ultra-static and ultra-stable operation of science platform for gravitational wave space detection. At present, the dynamics and control of the spacecraft system have been studied deeply by various research institutions at domestic and overseas, and different detection tasks have been proposed according to the requirements of different detection frequency bands. The design and control of spacecraft formation were introduced and analyzed in detail according to the exploration mission, and the principles and theoretical methods of drag-free and attitude control, high-precision inertial sensors and actuators involved were deeply dissected. The overall situation of demonstration and verification of drag-free spacecraft in orbit for space-based gravitational wave detection was detailed and analyzed. On this basis, the key problems required to be solved in the research of follow-up related were presented, and the research hotspots and trends in the methods of future dynamics and control of drag-free spacecraft systems were also pointed out.

      Abstract (5069) HTML (700) PDF (5.24 M) (3559)
    • Reasearch progress and prospects of deep learning for visual speech generation

      LIU Li; SUI Jinping; DING Ding; ZHAO Lingjun; KUANG Gangyao; SHENG Changchong
      LIU Li; SUI Jinping; DING Ding; ZHAO Lingjun; KUANG Gangyao; SHENG Changchong.Reasearch progress and prospects of deep learning for visual speech generation[J].国防科技大学学报,2024,46(2):123-138

      AbstractIn order to further advance the development of visual speech learning, the task definition and research significance of visual speech generation was expounded and the difficulties and challenges were deeply analyzed in this field. Besides, the current status and development level of visual speech generation research was introduced, and the recent mainstream methods were sorted, classified and commented based on the difference of generation frameworks. At the end of the paper, the potential problems and possible research directions of visual speech generation were discussed.

      Abstract (4918) HTML (721) PDF (3.82 M) (3028)
    • Technical research review on analysis and evaluation of anti-damage capability for missile launching vehicle

      GAO Qinhe; HUANG Tong; QIAN Bingwen; SHEN Fei; WANG Dong; GAO Lei
      GAO Qinhe; HUANG Tong; QIAN Bingwen; SHEN Fei; WANG Dong; GAO Lei.Technical research review on analysis and evaluation of anti-damage capability for missile launching vehicle[J].国防科技大学学报,2024,46(2):182-196

      AbstractIncreasing transparency of modern warfare has brought serious challenges to the survival of missile launching vehicle on the battlefield. Around the launcher anti-damage ability of analysis and evaluation technology, the threat of damage and damage mechanism faced by launcher were analyzed, current research status of four types of damage(shock wave, kinetic energy, thermal, and electromagnetic) from the perspective of the application of anti-damage capability assessment were elaborated, and different damage types in the evaluation of anti-damage capability and application directions in the analysis were putted forward; based on the vulnerability analysis space theory, the development process of equipment vulnerability analysis was summarized. It was considered that the logical transfer relationship from physical space to performance space was the key to the vulnerability analysis of launchers at present. Research trends of vulnerability criteria were introduced from the physical criteria, performance criteria and classification criteria, and the key criteria for vulnerability of launchers was proposed. Research concept and the main problems faced by analytical methods of the anti-damage capability of the launcher were explicitly described. Research conclusions can provide references for the analysis and evaluate related research of the anti-damage capability of the missile launching vehicle.

      Abstract (4340) HTML (814) PDF (633.68 K) (3502)
    • GaN power devices and their radiation effects for space applications

      BI Jinshun; SHEN Lizhi; MEI Bo; CAO Shuang; SUN Yi; YU Qingkui
      BI Jinshun; SHEN Lizhi; MEI Bo; CAO Shuang; SUN Yi; YU Qingkui.GaN power devices and their radiation effects for space applications[J].国防科技大学学报,2024,46(1):149-159

      AbstractIt is of great significance to study GaN(gallium nitride) power devices and their radiation effects to meet the needs of space applications and promote the construction of a new generation spacecraft. Main structures and working principles of GaN power devices were introduced. Research progress of total ionizing dose effect and single event effect of GaN power devices in recent years was reviewed. Degradation and damage mechanisms of GaN devices caused by radiation effects were analyzed and discussed. Research results show that GaN power devices have strong resistance to total ionizing dose. However, GaN power devices are prone to leakage and single event burnout due to their weak resistance to single event burnout, and most of the burnout points occur at the drain side of the gate edge. Research on the radiation damage mechanism of GaN power devices lacks authoritative theories and needs to be further mastered to provide theoretical support for their space application. GaN power devices with planar structure are the current mainstream technical solutions. Monolithic integration, high frequency and miniaturization are the development directions of GaN power devices in the future.

      Abstract (5110) HTML (1015) PDF (5.62 M) (3725)
    • Development status and technology challenges of high-altitude long-endurance solar-powered aircraft

      YANG Xixiang;HOU Zhongxi;GUO Zheng
      YANG Xixiang;HOU Zhongxi;GUO Zheng.Development status and technology challenges of high-altitude long-endurance solar-powered aircraft[J].国防科技大学学报,2023,45(6):1-9

      AbstractHALE(high-altitude long-endurance) solar-powered aircrafts are the research frontiers, they can staying airborne for several months, and can form new application ability named "long-endurance+station-keeping". The three-stage development process of HALE solar-powered aircrafts was systematically summarized, including early exploration stage, rapid development stage and operational capability demonstration stage, and typical development plans aboard were introduced. Key technology challenges were analyzed, including aerodynamic configuration design, energy storage battery, high altitude propulsion, large scale structure and flight control, and the suggestions for research directions were proposed. All those can provide reference for innovation development of HALE solar-powered aircrafts.

      Abstract (5102) HTML (1351) PDF (2.85 M) (4376)
    • State of the art and prospects of neural architecture search

      DING Ding;LIU Wenzhe;SHENG Changchong;SUI Jinping;LIU Li
      DING Ding;LIU Wenzhe;SHENG Changchong;SUI Jinping;LIU Li.State of the art and prospects of neural architecture search[J].国防科技大学学报,2023,45(6):100-131

      AbstractNeural architecture search is a task that aims to automatically search for the optimal neural network structure for different tasks, which is of great importance and inevitability in the joint development of deep learning and computer vision to the current stage. A comprehensive review of the research on neural network search was provided. In specific, the definition and significance of neural architecture search were introduced, and the difficulties and challenges faced in relevant research were deeply analyzed. Based on this, the mainstream search strategies was elaborate and summarize; Finally, the potential problems and possible future research directions were summarized and discussed to promote further development in this field.

      Abstract (4545) HTML (812) PDF (3.04 M) (4596)
    • Research progress of anti-irradiation MRAM

      SUN Jiejie;WANG Chao;LI Jiawei;JIANG Chuanpeng;CAO Kaihua;SHI Hui;ZHANG Youguang;ZHAO Weisheng
      SUN Jiejie;WANG Chao;LI Jiawei;JIANG Chuanpeng;CAO Kaihua;SHI Hui;ZHANG Youguang;ZHAO Weisheng.Research progress of anti-irradiation MRAM[J].国防科技大学学报,2023,45(6):174-195

      AbstractThe novel non-volatile MRAM(magnetic random access memory) has the advantages of fast read and write speed, long data retention time and low power consumption, which attracts wide attention from researchers. Its excellent anti-irradiation capabilities are explored in depth, and further applications in aerospace and other fields are expected. The industrial development, technological changes and applications of MRAM were reviewed, the mature MRAM products of recent years were listed, and the advantages and disadvantages of different generations of MRAM were analyzed. The radiation effects of MTJ(magnetic tunnel junction) and read/write circuit based CMOS(complementary metal oxide semiconductor) were discussed. The recent achievements in anti-radiative hardening design for MRAM were summarized. The development prospect of anti-irradiation MRAM in aerospace field and even nuclear energy field was prospected.

      Abstract (4552) HTML (1076) PDF (6.48 M) (4185)
    • Overview of cognitive electronic warfare

      HUANG Zhitao; WANG Xiang; ZHAO Yurui
      HUANG Zhitao; WANG Xiang; ZHAO Yurui.Overview of cognitive electronic warfare[J].国防科技大学学报,2023,45(5):1-11

      AbstractCognitive electronic warfare is usually defined as a form of electronic warfare that is based on electronic warfare equipment with cognitive performance and focuses on autonomous interactive electromagnetic environment learning capability and dynamic intelligent confrontation task processing capability. Since it was first proposed, it has attracted extensive attention from researchers and scholars at home and abroad for its advantages of accurate perception, strong reasoning and fast decision-making. With the continuous emergence of new concepts, technologies and applications of artificial intelligence, cognitive electronic warfare has stepped into a brand new stage of development. In order to capture its future development direction, the connotation of the concept of cognitive electronic warfare was summarized and enriched from the perspective of artificial intelligence, the development of cognitive electronic warfare and typical foreign projects were sorted out, the framework and architecture of cognitive electronic warfare system was built, a comprehensive and systematic review of the key technologies of cognitive electronic warfare was conducted from the aspects of perception, judgment, decision-making, etc., and the challenges and development trends of cognitive electronic warfare were summarized.

      Abstract (8039) HTML (365) PDF (1.31 M) (8024)
    • Overview of GNSS/INS ultra-tight integrated navigation

      NI Shaojie; LI Shiyang; XIE Yuchen; DENG Ding
      NI Shaojie; LI Shiyang; XIE Yuchen; DENG Ding.Overview of GNSS/INS ultra-tight integrated navigation[J].国防科技大学学报,2023,45(5):48-59

      AbstractGNSS/INS ultra-tight integrated navigation system has become a research hotspot in the field of integrated navigation due to its high positioning accuracy, excellent dynamic performance and strong anti-jamming ability. The principle of GNSS/INS ultra-tight integration was introduced, and the advantages and features of ultra-tight integration mode relative to other integration modes were compared based on the analysis of the technical principle. The domestic and international research status was introduced, represented by ultra-tight integration under high dynamics and MIMU/GNSS ultra-tight integration. The key technologies such as fault-tolerant control technology, neural network assistance, and multi-sensor assisted ultra-tight integration were summarized, and the prospect of GNSS/INS ultra-tight integration towards low cost, high precision and strong stability was prospected.

      Abstract (6987) HTML (348) PDF (2.37 M) (5501)
    • Survey on converged networks of high-performance computing network and data center network

      LU Pingjing; DONG Dezun; LAI Mingche; QI Xingyun; XIONG Zeyu; CAO Jijun; XIAO Liquan
      LU Pingjing; DONG Dezun; LAI Mingche; QI Xingyun; XIONG Zeyu; CAO Jijun; XIAO Liquan.Survey on converged networks of high-performance computing network and data center network[J].国防科技大学学报,2023,45(4):1-10

      AbstractWith the convergence trend of high performance computing, big data processing, cloud computing and artificial intelligence computing, the converged network of high-performance computing network and data center network becomes an important trend. The current research status of converged network was analyzed, and the representative converged networks were described in detail to comprehensively show the latest technologies and trends. The challenges faced by the converged network were put forward, and the trends of converged network were proposed, including the convergence and differentiation coexistence of the converged network protocols, the performance acceleration of the converged network based on in-network computing, and the performance optimization of the converged network for emerging applications.

      Abstract (6961) HTML (365) PDF (1.29 M) (6053)
    • Research progress in damage mechanism of nickel-based single crystal superalloys under service conditions

      SHEN Jianghua; ZHOU Yuting; WANG Xiuxia
      SHEN Jianghua; ZHOU Yuting; WANG Xiuxia.Research progress in damage mechanism of nickel-based single crystal superalloys under service conditions[J].国防科技大学学报,2023,45(4):55-65

      AbstractIn order to improve the service life of nickel-based single crystal blades and solve the key technology of aeroengine turbine and gas turbine, domestic and overseas researchers carried out a large number of research on the failure and damage mechanism of nickel-based single crystal superalloys under service conditions in recent years. The research achievements and progress of fatigue, creep and thermomechanical fatigue damage mechanism of nickel-based single crystal superalloys under service conditions were concluded. In addition, in view of the time and cost increase caused by a large number of experiments, the research works and achievements in life prediction methods of nickel-based single crystal superalloys in recent years were summarized, and the difficulties and challenges in life evaluation and failure analysis of nickel-based single crystal superalloys were proposed.

      Abstract (5540) HTML (299) PDF (5.12 M) (4666)
    • Research progress of operational reliability of civil aircraft

      FENG Yunwen; LIU Jiaqi; PAN Weihuang; LU Cheng
      FENG Yunwen; LIU Jiaqi; PAN Weihuang; LU Cheng.Research progress of operational reliability of civil aircraft[J].国防科技大学学报,2023,45(4):66-93

      AbstractBased on the technical status and development trend of civil aircraft operation reliability research, the requirements of civil aircraft operation reliability research were expounded according to the current type design, development and actual situation of in-service aircraft. By reviewing the research progress and engineering application status of civil aircraft operational reliability theory, the research status and problems of civil aircraft operational reliability are elaborated from six aspects:operation data acquisition and processing, operational reliability analysis method, operational reliability prediction feedback technology, optimization design based on operational reliability, optimize maintenance tasks, and comprehensive management platform for operational reliability. The future development direction of operation reliability research of civil aircraft is prospected.

      Abstract (5904) HTML (443) PDF (4.56 M) (5926)
    • Progress in internal wave theory for two-layer and three-layer fluid systems

      ZHAO Binbin; ZHANG Tianyu; DU Hui; DUAN Wenyang; WANG Zhan
      ZHAO Binbin; ZHANG Tianyu; DU Hui; DUAN Wenyang; WANG Zhan.Progress in internal wave theory for two-layer and three-layer fluid systems[J].国防科技大学学报,2023,45(4):124-135

      AbstractInternal waves, occurring in stratified ocean, are ubiquitous in the world oceans. It is of great significance for our country′s marine development to study the generation and evolution of internal waves. Based on the internal wave theory of two-layer and three-layer fluid systems, the KdV(Korteweg-de Vries) internal wave theory, MCC(Miyata-Choi-Camassa) internal wave theory, HLGN(high-level Green-Naghdi) internal wave theory and Dubreil-Jacotin-Long internal wave theory, which were widely used at home and abroad, were selected to review their research progress. The advantages and limitations of different internal wave theories were discussed from mathematical models, theoretical research and numerical simulations. In the view of mathematical derivation, it is proved that MCC internal wave theory is equivalent to the first-level HLGN internal wave theory.

      Abstract (6367) HTML (226) PDF (667.08 K) (4767)
    • Current status and trend of dynamic atomization characteristics of swirl injector under oscillating environment in liquid rocket engines

      JIANG Chuanjin; REN Yongjie; TONG Yiheng; XIE Yuan; CHU Wei; LI Xiuqian
      JIANG Chuanjin; REN Yongjie; TONG Yiheng; XIE Yuan; CHU Wei; LI Xiuqian.Current status and trend of dynamic atomization characteristics of swirl injector under oscillating environment in liquid rocket engines[J].国防科技大学学报,2023,45(3):1-19

      AbstractIn order to master the atomization characteristics of oscillating spray and its relationship with unstable combustion, research and development of gas-liquid coaxial swirl injectors and liquid-liquid coaxial swirl injectors, which are widely used in liquid rocket engines, are reviewed from three aspects of excited oscillation, self-pulsation, and interactions of spray oscillation with combustion stability, so as to deepen our understanding of them. According to the review, for the excited oscillation, the research on the upstream pressure oscillation caused by flow oscillation of supply system under normal temperature and pressure conditions is relatively sufficient. However, the research on the backpressure oscillation caused by pressure oscillation in the combustion chamber and the research on the excited oscillation of spray under supercritical conditions are lack. For the self-pulsation, the current research is focused on the liquid-centered coaxial swirl injectors. There are few studies on the gas-centered coaxial swirl injectors and liquid-liquid coaxial swirl injectors. The optical diagnosis technology is far from enough to extract the single combustion flow field information.

      Abstract (6420) HTML (253) PDF (9.72 M) (4756)
    • Research progress of energy and actuation technology for micro-soft robots

      YANG Yun; LIN Zening; HONG Yang; JIANG Tao; SHANG Jianzhong; LUO Zirong
      YANG Yun; LIN Zening; HONG Yang; JIANG Tao; SHANG Jianzhong; LUO Zirong.Research progress of energy and actuation technology for micro-soft robots[J].国防科技大学学报,2023,45(3):76-85

      AbstractMicro-soft robots with high compliance, low energy consumption and high energy density have wide application prospects in complex environments such as pipeline maintenance and battle field reconnaissance. Energy and actuator play a decisive role in the motion modes and performances of micro-soft robots. In order to make more researchers understand the research progresses of the existing flexible driving technology and their energy sources, the typical driving methods based on physical energy driving, chemical energy driving and biological hybrid driving were summarized and analyzed. The shortcomings and future development of the existing flexible driving technology and their energy sources were discussed and summarized, which can provide reference for the development and improving performance of the flexible drive technology of soft robots in the future.

      Abstract (6807) HTML (113) PDF (5.81 M) (4337)
    • Review of the detection and removal methods of raindrops attached to the lens surface

      LI Zhong; OUYANG Bin; QIU Shaohua; CUI Xiaopeng; XU Xinghua
      LI Zhong; OUYANG Bin; QIU Shaohua; CUI Xiaopeng; XU Xinghua.Review of the detection and removal methods of raindrops attached to the lens surface[J].国防科技大学学报,2023,45(3):146-160

      AbstractVisual system is an important part of autonomous unmanned system. The raindrops attached to the surface of the camera lens will produce artifacts in the image, resulting in the degradation of image quality, which will significantly affect the performance of the visual system. The detection and removal methods of attached raindrops in recent years were comprehensively and deeply researched. The essence of the problem was condensed, and the existing raindrop imaging models were summarized. Different technical methods were sorted out from three directions:model-based, data-driven and camera system-based, then the development of deep network model was summarized from two aspects of network architecture and loss function. The existing datasets of attached raindrops were summarized, and the performance of some algorithms was compared through the experimental results. The main problems in the task of raindrop detection and removal were discussed, and the possible development direction in this field was prospected.

      Abstract (6050) HTML (290) PDF (10.57 M) (4209)
    • Survey on key technologies of UAV advanced ground stations

      XIANG Xiaojia; TAN Qin; WANG Chang; ZHOU Han; TANG Dengqing; NIU Yifeng
      XIANG Xiaojia; TAN Qin; WANG Chang; ZHOU Han; TANG Dengqing; NIU Yifeng.Survey on key technologies of UAV advanced ground stations[J].国防科技大学学报,2023,45(2):1-14

      AbstractThe novel UAV (unmanned aerial vehicle) ground station with advanced control capabilities such as immersive display, intelligent assistance, and naturalized human-computer interaction has become a hot research topic in the field of UAV control. To analyze the technical aspects, the functional points and designs concepts of a series of advanced ground stations for UAVs at home and abroad were systematically compared. The technical system composition from the OODA (observe, orient, decide and act) loop of UAV ground station command and control were summarized and refined. The key techniques such as task environment construction, battlefield situation immersive display, intelligent assisted decision and naturalized human-computer interaction were analyzed and pointed out. The main research methods of various techniques were deeply analyzed, and the current challenges and future development trends of UAV advanced ground stations were also studied and judged. In addition, it provides guidance and reference for the development of novel ground stations.

      Abstract (9437) HTML (195) PDF (10.37 M) (5475)
    • Review of visual-inertial navigation system initialization method

      LIU Zhe; SHI Dianxi; YANG Shaowu; LI Ruihao
      LIU Zhe; SHI Dianxi; YANG Shaowu; LI Ruihao.Review of visual-inertial navigation system initialization method[J].国防科技大学学报,2023,45(2):15-26

      AbstractVINS (visual-inertial navigation systems) solve a series of parameters required for state estimation through initialization, such as scale, gravity vector, velocity, inertial measurement unit′s bias, etc., to improve the accuracy of navigation positioning and environmental perception of the system. The initialization methods of VINS can be divided into three categories according to the sensing information fusing mode:joint initialization, disjoint initialization and semi-joint initialization. Based on the existing research work, the current mainstream initialization methods of VINS were reviewed from four aspects:basic theory, development and classification, existing methods, performance evaluation, and the future development trends were summarized, which is helpful to have a general understanding of VINS initialization methods and grasp its development direction.

      Abstract (9065) HTML (254) PDF (8.97 M) (5068)
    • Review on the memristor based neuromorphic chips

      CHEN Changlin; LUO Changhang; LIU Sen; LIU Haijun
      CHEN Changlin; LUO Changhang; LIU Sen; LIU Haijun.Review on the memristor based neuromorphic chips[J].国防科技大学学报,2023,45(1):1-14

      AbstractIn order to master the current development status and development trends of memristor based neuromorphic chips, the existing memristor based neuromorphic chips and architectures were investigated. The memristor array structure and integration process, anterior and posterior neuron circuits, multi-array interconnection topology and data transmission strategy used in the chip, as well as the system simulation and evaluation methods used in the chip design process were compared and analyzed. It is concluded that the current circuit design of memristor based neuromorphic chips still need to solve the problems of limited resistance states, large device parameter fluctuation, complex array peripheral circuits, small integration scale, etc. It is pointed out that the actual application of this type of chip still faces challenges such as the improvement of memristor production process, improvement of development tool support, special instruction set development, and determination of typical traction applications.

      Abstract (7952) HTML (240) PDF (14.15 M) (5734)
    • Review on motion planning methods for unmanned aerial vehicle cooperative maneuvering flight in cluttered environment

      NIU Yifeng; LIU Tianqing; LI Jie; JIA Shengde
      NIU Yifeng; LIU Tianqing; LI Jie; JIA Shengde.Review on motion planning methods for unmanned aerial vehicle cooperative maneuvering flight in cluttered environment[J].国防科技大学学报,2022,44(4):1-12

      AbstractThe basic principle, representative methods, and state-of-the-art research of the sub-module related research within the general framework of cooperative maneuvering flight planning from single UAV (unmanned aerial vehicle) maneuvering flight to multi-UAV cooperative planning were introduced. It mainly included real-time navigation map construction, discrete-space path planning, continuous-space trajectory planning, hybrid planning based on discrete-space and continuous-space, and multi-courses/trajectories cooperative planning. The next research directions were proposed based on the major technologies of the planning framework.

      Abstract (9232) HTML (252) PDF (10.88 M) (5892)
    • Review of RCS measurement and imaging methods of stealth aircraft

      JIA Gaowei; YIN Peng; SHAO Shuai; WANG Jianfeng
      JIA Gaowei; YIN Peng; SHAO Shuai; WANG Jianfeng.Review of RCS measurement and imaging methods of stealth aircraft[J].国防科技大学学报,2022,44(3):93-103

      AbstractStealth aircraft has gradually become a great power, and will continue to play an important role, making stealth technology become the key technology of aircraft design. RCS(radar cross section) measurement of stealth aircraft is a necessary step to design, manufacture and maintain stealth aircraft. The basic process of RCS measurement of stealth aircraft was reviewed from three aspects:RCS test of scaled model, outdoor RCS test of full-scale aircraft and indoor near-field test of full-scale aircraft, the theoretical basis of RCS near-field measurement of stealth aircraft was summarized, and the near-field RCS measurement technology with imaging diagnosis function was analyzed intensively. The development trend and key technologies of stealth aircraft RCS measurement were prospected, which is helpful to have a general understanding of RCS measurement of stealth aircraft and grasp the development direction of RCS measurement.

      Abstract (8089) HTML (246) PDF (21.22 M) (5511)
    • Review of dynamic characterization research of high power IGBTs and their combinations under multiple time scales

      XIAO Fei; MA Weiming; LUO Yifei; LIU Binli; JIA Yingjie; LI Xin
      XIAO Fei; MA Weiming; LUO Yifei; LIU Binli; JIA Yingjie; LI Xin.Review of dynamic characterization research of high power IGBTs and their combinations under multiple time scales[J].国防科技大学学报,2021,43(6):108-126

      AbstractBased on demand of multiple time scale dynamic characterization of power electronic devices and their combination, the recent research progress and achievements on the widely used full-control power electronic devices—IGBTs(insulated gate bipolar transistors), were analyzed systematically, including the multiple time scales electro-thermal modeling of high power IGBTs and their combinations, quantitative failure evaluation methods based on the multiple time scales model and the assisted multi-rate simulation method. Furthermore, applications of the models were introduced in power electronic instruments design. In conclusion, the dynamic characterization method of high power IGBTs and their combinations under multiple time scales were presented from four aspects of modelling method, reliability evaluation, simulation method and application design, which can bring theoretical and technical support of power electronic devices to precise design of power electronic hybrid system.

      Abstract (7919) HTML (151) PDF (20.53 M) (5745)
    • Review on two-dimensional trajectory correction projectile and its guidance and control technology

      XING Bingnan; DU Zhonghua; DU Chengxin
      XING Bingnan; DU Zhonghua; DU Chengxin.Review on two-dimensional trajectory correction projectile and its guidance and control technology[J].国防科技大学学报,2021,43(4):53-68

      AbstractIn view of the wide application prospect of intelligent ammunition, the development of two-dimensional trajectory correction projectile, main correction mechanism scheme and guidance control technology were summarized. The development process of the two-dimensional trajectory correction projectile was reviewed, aiming to reveal the development principle. Several main correction schemes were discussed, and the function characteristics and research difficulties of each mechanism were analyzed. Based on the requirements of the two-dimensional trajectory correction projectile, the research status of its control technology was summarized from three aspects:aerodynamic identification and state estimation algorithm, parameter optimization algorithm and guidance law. The rapid development of intelligent algorithm in recent years, especially the application of neural network theory in the field of control algorithm was focused on. The main technical difficulties and the future development direction of the control research of the two-dimensional trajectory correction projectile, which provides ideas for the design, were pointed out.

      Abstract (9862) HTML (127) PDF (11.48 M) (7852)
    • Current status and trend of UAV swarm communication payload technology based on free space optical

      SU Shaojing; TONG Xiaozhong; WEI Junyu; WU Peng
      SU Shaojing; TONG Xiaozhong; WEI Junyu; WU Peng.Current status and trend of UAV swarm communication payload technology based on free space optical[J].国防科技大学学报,2021,43(4):118-127

      AbstractThe application requirements of UAV (unmanned aerial vehicle) swarm communication payload technology based on FSO (Free Space Optical) were summarized, and the current status of FSO technology and application at home and abroad UAV payloads was discussed. The development prospect of the payload technology of UAV swarm based on FSO communication in high-speed mobile communication environment was also analyzed. Furthermore, a profound analysis on the key technologies in FSO communication links applied to UAV swarm was conducted. Predictably, FSO-based communication payload will be used widely for wide-bandwidth communication networking of UAV swarm in the future.

      Abstract (10431) HTML (151) PDF (6.16 M) (6934)
    • Review of layerwise theory for composite materials laminated structures and its applications

      SHEN Haijun; LI Wei
      SHEN Haijun; LI Wei.Review of layerwise theory for composite materials laminated structures and its applications[J].国防科技大学学报,2021,43(3):1-14

      AbstractLayerwise theory, proposed by Reddy, is a 3D analysis method for accurately analyzing composite laminated plates and shells. Without introducing any deformation and stress hypothesis, layerwise theory, compared with the classical equivalent single layer theories, has greater advantages for static and dynamic responses analysis of thick composite laminated plates and shells, especially for local interlaminar effects analysis. A review and recent research progress of the layerwise theory were presented, and its numerical solutions and applications were demonstrated as well. The basis of layerwise theory and its recent development were introduced. The implementation of layerwise finite element method and its refined models were discussed. The employment of layerwise theories for conducting static and vibration analyses and the damage model analysis of composite laminated plates and shells were outlined. And several future research trends were recommended in the end.

      Abstract (8255) HTML (165) PDF (10.41 M) (6939)
    • Research progress and application of thermal fluid platelet devices

      YIN Liang; LIU Weiqiang
      YIN Liang; LIU Weiqiang.Research progress and application of thermal fluid platelet devices[J].国防科技大学学报,2021,43(3):15-22

      AbstractThe platelet technology has been in rapid development because of several features, including the special structure of flow channel, the precise size and location, and can provide solutions to difficult thermal and fluid flow problems. As a result, the platelet technology is a major technological innovation in the history of science and technology. The characteristics and development of platelet fluid devices were briefly introduced. Some typical new applications at home and abroad in recent years, such as platelet injector, platelet transpiration cooling nose-tip, platelet fluid mixer, platelet thruster of high speed ship and platelet muffler were summarized. Finally, the correlation of processing of platelet technology and 3D printing technology was described.

      Abstract (7275) HTML (146) PDF (7.08 M) (6401)
    • Review of multi-modal image matching assisted inertial navigation positioning technology for unmanned aerial vehicle

      LUO Shibin; LIU Haiqiao; HU Maoqing; DONG Jing
      LUO Shibin; LIU Haiqiao; HU Maoqing; DONG Jing.Review of multi-modal image matching assisted inertial navigation positioning technology for unmanned aerial vehicle[J].国防科技大学学报,2020,42(6):1-10

      AbstractHigh-precision positioning and navigation in GPS(global positioning system) denied environments is a key technology for aircraft achieving autonomous scout, cruise, and strike. Vision navigation has the advantages of passive-type, low cost, and avoidable accumulated errors avoidable, etc. The fusion of vision and inertial navigation can give full play to their advantages and achieve the purpose of high-precision positioning. Firstly, the development of aircraft positioning technology based on multi-modal image matching assisted inertial navigation was summarized. Then this technology was elaborated in five aspects:the vision-internal calibration, multi-modal image matching, attitude algorithm, data fusion, and back-end optimization. Finally, four possible future directions were proposed as follows, two types of passive positioning combined navigation systems based on deep learning, multi-modal image matching and inertial navigation. The four possible future directions provide a reference for realizing multi-modal image matching assisted inertial navigation aircraft positioning technology.

      Abstract (8043) HTML (127) PDF (8.00 M) (9061)
    • Research progress of the underwater gravity-aided navigation based on the information of aerospace-marine integration

      ZHENG Wei; LI Zhaowei; WU Fan
      ZHENG Wei; LI Zhaowei; WU Fan.Research progress of the underwater gravity-aided navigation based on the information of aerospace-marine integration[J].国防科技大学学报,2020,42(3):39-49

      AbstractThe accurate navigation of the underwater vehicle plays an important role in the process of the ocean utilization and development. The problem of restraining the accumulation errors of the underwater navigation over time was discussed and analyzed in detail. Firstly, the development history of the inertial devices was briefly described. Secondly, the advantages and disadvantages of each navigation system were compared in detail, the research status of the gravity-aided navigation at home and abroad were introduced, and the demand for the high-precision navigation of the underwater vehicles and the scientific problems of insufficient spatial resolution of the global marine gravity reference map were analyzed. Finally, the idea and technical route of obtaining the high spatial resolution and high precision global marine gravity reference map by GNSS-R altimetry constellations are proposed in order to improve the accuracy of the underwater gravity-aided navigation.

      Abstract (7804) HTML (127) PDF (6.14 M) (5170)
    • A survey of the techniques of volume rendering for large-scale scientific data

      WANG Huawei; HE Liu; CAO Yi; XIAO Li
      WANG Huawei; HE Liu; CAO Yi; XIAO Li.A survey of the techniques of volume rendering for large-scale scientific data[J].国防科技大学学报,2020,42(2):1-12

      AbstractVolume rendering is an effective method to visualize complex physical features in large-scale scientific data with high expressiveness, the difficulties in processing huge amount of data and capturing complex features, however, are still a great challenge to volume rendering. To address the challenges and improve efficiency and effect of volume rendering, researchers conducted in-depth research on volume rendering algorithms from three aspects. On the one hand, it is an effective way to improve the efficiency of volume rendering by sharing computation with lots of processor cores so as to reduce the computational amount of one processor core. On the other hand, by fully exploring the intrinsic characteristics of three-dimensional data fields, data reduction methods can greatly decrease the amount of data in the rendering process and thus reduce the overhead of a volume rendering algorithm. In addition, feature analysis and enhancement techniques can also be integrated into volume rendering algorithms, thus complex physical features are highlighted from the data fields and high-quality rendering of scientific data is achieved. A survey of recent advances on volume rendering techniques was presented and various research methods were analyzed. In the end, this paper makes prospection for future research directions on volume rendering of large-scale scientific data, including application-driven feature volume rendering, feature-based data reduction in volume rendering, hardware-adapted multi-level acceleration of volume rendering and in-situ intelligent volume rendering.

      Abstract (7345) HTML (114) PDF (7.98 M) (7084)
    • Research progress of supercontinuum laser source

      YANG Weiqiang; SONG Rui; HAN Kai; HOU Jing
      YANG Weiqiang; SONG Rui; HAN Kai; HOU Jing.Research progress of supercontinuum laser source[J].国防科技大学学报,2020,42(1):1-9

      AbstractAlong with the maturity of high-nonlinearity optical fiber manufacturing technology and the improvement of the performance of fiber lasers, the supercontinuum sources have entered a period of rapid development. Supercontinuum generation by using optical fibers as the non-linear media has become a research hotspot. The technical schemes and recent progress of supercontinuum generation were been reviewed from three different bands:visible, near-infrared and mid-infrared. At present, the output power of the visible and near-infrared supercontinuum sources broke through 100 W. At the same time, many new schemes such as supercontinuum generation in multi-core photonic crystal fibers, fiber amplifiers and random fiber lasers were developed. The output power of mid-infrared supercontinuum generation by using fluoride and tellurite fibers as non-linear media, also reached 10 W. The output spectrum of supercontinuum generation with chalcogenide optical fibers as non-linear medium was extended to more than 12 μm.

      Abstract (10745) HTML (146) PDF (1.56 M) (8295)
    • Advanced imaging and detecting technology for precision guidance

      LUO Chenggao; DENG Bin; CHENG Yongqiang; WANG Wenpeng; WANG Hongqiang;WANG Zhan
      LUO Chenggao; DENG Bin; CHENG Yongqiang; WANG Wenpeng; WANG Hongqiang;WANG Zhan.Advanced imaging and detecting technology for precision guidance[J].国防科技大学学报,2019,41(5):174-184

      AbstractThe history of precision guidance technologies was reviewed, and the challenges and main developing trends of imaging and detecting technologies for precision guidance were illustrated. Combined with the recent developments of the emerging technologies such as terahertz, quantum and metamaterial, the backgrounds, developing venation, basic principles and advantages of three typical advanced imaging and detecting technologies, namely, terahertz radar, quantum radar and metamaterial radar were expounded. These advanced techniques may have the potential to provide feasible approaches for precision guidance technology to overcome the challenges brought by the future new warfare form. The analysis results will provide some positive guidance and is of significance for improving the strike and intercept effectiveness of the precision guided weapon systems.

      Abstract (9080) HTML (113) PDF (755.65 K) (8259)
    • Definition and measurement of system complexity

      DUAN Xiaojun; YIN Yimin;GU Kongjing
      DUAN Xiaojun; YIN Yimin;GU Kongjing.Definition and measurement of system complexity[J].国防科技大学学报,2019,41(1):191-198

      AbstractComprehension of complexity is one of the key challenges in science and technology. Complexity is a very important conception in interdisciplinary systems science, and is significant to researchers. The basic semantic background on system complexity was presented and the various definitions of complexity domestically and overseas were analyzed. On the basis of the classification of ontology and epistemology, a taxonomy of complexity was described on the basis of the state-of-the-art works on complexity definition. Meanwhile, a category of complexity measurements and the corresponding mathematical tools were proposed. Examples were given for the efficiency of complexity classification and measures.

      Abstract (8260) HTML (121) PDF (602.50 K) (8930)
    • Research progress in controlling femtosecond laser filamentation in atmosphere

      NIE Jinsong;HU Yuze
      NIE Jinsong;HU Yuze.Research progress in controlling femtosecond laser filamentation in atmosphere[J].国防科技大学学报,2018,40(4):1-8

      AbstractUnder the dynamic equilibrium among diffraction, dispersion, Kerr effect and multiple photons ionization, a self-guiding filament formed by femtosecond laser with long propagation distance can be constructed, which is accompanied by a narrow plasma channel. In order to control the propagation features of filamentation explicitly in air, a way to effectively regulate filamentation propagation modes and spatio temporal distributions has become a research hotspot. On the basis of introducing the physical model of filamentation briefly, a general overview of controlling filamentation divided by two parts was presented in this review: temporal modulations and spatial modulations. In particular, the latter consists of modulations designed by phase, amplitude and special beams. Our findings suggest that unique filaments controlled by initial modulations can offer advantages and fundamentals for the realization of numerous potential applications.

      Abstract (10688) HTML (135) PDF (565.77 K) (8359)
    • Current status and prospect for the method on reliability analysis of hull structures in-service

      HUA Lin; WU Fan; LYU Yansong;MU Jinlei
      HUA Lin; WU Fan; LYU Yansong;MU Jinlei.Current status and prospect for the method on reliability analysis of hull structures in-service[J].国防科技大学学报,2018,40(4):173-180

      AbstractAs 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.

      Abstract (8090) HTML (126) PDF (556.69 K) (7812)
    • Survey of alert-correlation based on network threat detection techniques

      WANG Yijie; CHENG Li;MA Xingkong
      WANG Yijie; CHENG Li;MA Xingkong.Survey of alert-correlation based on network threat detection techniques[J].国防科技大学学报,2017,39(5):128-138

      AbstractThe rapid development of the Internet also causes more and more network threats. How to detect the network threats in a real-time and accurate manner becomes one of the key technique issues. The alert-correlation-based network threat detection technique is becoming the research hotspot, which couples with the widely used security products and fully exploits the relation between abnormal events to reconstruct the attack scenario. Starting from the features of network threats and security environment, the requirements and classification of network threat detection were introduced. Then the basic concepts and system model of alert-correlation-based network threat detection technique were illustrated in detail. The key module of the model, aler correlation method, and the fundamentals and features of different kinds of typical algorithm were studied in detail, including causal-relation-based method, case-based method, similarity-based method and data-mining-based method. Furthermore, three kinds of representative detection system architectures were discussed with practical instances, namely centralized architecture, hierarchical architecture and distributed architecture. Finally, based on the analysis of recent research work, the future work is discussed and outlined.

      Abstract (9125) HTML (0) PDF (591.81 K) (8173)
    • A survey of gliding guidance methods for hypersonic vehicles

      PAN Liang; XIE Yu; PENG Shuangchun; XU Mingliang;YUAN Tianbao
      PAN Liang; XIE Yu; PENG Shuangchun; XU Mingliang;YUAN Tianbao.A survey of gliding guidance methods for hypersonic vehicles[J].国防科技大学学报,2017,39(3):15-22

      AbstractThe basic problem of gliding guidance for hypersonic vehicles was proposed, and the difficulties of complicated multiple constraints, maneuver requirements, and parameter perturbation in the course of gliding guidance were analyzed. The corresponding research status at home and abroad was surveyed, and the problems were also pointed out. On this basis, the key problems required to be solved at present in the research of gliding guidance for hypersonic vehicles were presented, and the research hotspots in the methods of future gliding guidance were also pointed out. 

      Abstract (21093) HTML (113) PDF (477.63 K) (14919)
    • Wind tunnel based virtual flight testing system and key technologies for the evaluation of flight control system

      HUANG Min; WANG Zhongwei;GUO Zhenyun
      HUANG Min; WANG Zhongwei;GUO Zhenyun.Wind tunnel based virtual flight testing system and key technologies for the evaluation of flight control system[J].国防科技大学学报,2017,39(2):1-8

      AbstractIn order to provide a guide for specific investigations on WTBVFT(wind tunnel based virtual flight testing) techniques, the test system and key technologies of WTBVFT for the evaluation of FCS (flight control system) were analyzed. Based on the deficiencies of the traditional FCS evaluation methods, the advantages of WTBVFT for evaluation of FCS were analyzed. According to the common constitution of attitude control loop and guidance control loop used by FCS, the test system and working principle of WTBVFT for FCS evaluation were presented. The main differences between the WTBVFT system and the hardware-in-the-loop simulation system were analyzed. The key technologies of WTBVFT for FCS evaluation were also analyzed, including WTBVFT evaluation methods, aircraft model design technique, FCS modification technique, and model support technique.

      Abstract (8768) HTML (156) PDF (728.53 K) (7841)
    • Electromagnetic launch technology

      MA Weiming;LU Junyong
      MA Weiming;LU Junyong.Electromagnetic launch technology[J].国防科技大学学报,2016,38(6):1-5

      AbstractElectromagnetic launch technology is an inevitable trend among methods of launch in the future. The principle and technology characteristics of electromagnetic launch is analyzed, three branches of electromagnetic launch technology development overseas in electromagnetic ejection, electromagnetic railgun and electromagnetic pushing were studied, and the key technology of electromagnetic launch was summarized. Furthermore, the development strategy and the extension application prospect of electromagnetic launch technology was proposed.

      Abstract (21841) HTML (105) PDF (450.33 K) (17725)
    • Review of the interdependent networks

      LAO Songyang; WANG Junde;BAI Liang
      LAO Songyang; WANG Junde;BAI Liang.Review of the interdependent networks[J].国防科技大学学报,2016,38(1):122-128

      AbstractIn recent years, the network dependency and interdependent networks have become a research hotspot in the field of complex network, but literature about the overview of related research progress is still very rare. Based on the systematic research of domestic and overseas literatures, the percolation theory of the interdependent networks was briefly introduced, and the cascading failure process of the interdependent networks was described. Then the related progress was summarized from three aspects that can affect the robustness of interdependent networks: characteristics of sub network, type of dependency edge, the combination of sub networks. Finally, the future development direction of interdependent networks was prospected in both theoretical and practical aspects.

      Abstract (11129) HTML (111) PDF (614.53 K) (9034)
    • Overview of pseudo-spectral method and its application intrajectory optimum design for flight vehicles

      YANG Xixiang; YANG Huixin;WANG Peng
      YANG Xixiang; YANG Huixin;WANG Peng.Overview of pseudo-spectral method and its application intrajectory optimum design for flight vehicles[J].国防科技大学学报,2015,37(4):1-8

      AbstractTrajectory optimum design for flight vehicles using pseudo-spectral methods has been a hot research direction in recent years, but studies about the overview of this field are very few. Based on the systematic research of domestic and overseas related literatures, the basic principles of several pseudo-spectral methods which have a wide range of applications in aerospace field were expounded; the thoughts and formulas for transforming continuous optimal control problems into nonlinear programming problems were concluded; the applications of pseudo-spectral method in the trajectory optimum design for flight vehicles were summarized; the development directions of pseudo-spectral method and its application in trajectory optimization design for flight vehicles were discussed.

      Abstract (10528) HTML (117) PDF (403.76 K) (8361)
    • Development status and tendency of active debris removal

      CAO Xibin; LI Feng; ZHANG Jinxiu;Richard Muriel
      CAO Xibin; LI Feng; ZHANG Jinxiu;Richard Muriel.Development status and tendency of active debris removal[J].国防科技大学学报,2015,37(4):117-120

      AbstractWith the increase of domestic and foreign launching tasks, it is becoming a serious challenge that plenty of failure or invalid spacecrafts in the process of space resources recycling. The active debris removal can be regarded as an effective and fundamental means that can realize the reuse of space resources and safe disposal. The concept of active debris removal is clarified and its development process also is analyzed. Some key techniques, such as relative navigation, coordinated control, capture method and device for non-cooperative target, are proposed. It will provide some fruitful reference for our country′s active debris removal in future.

      Abstract (9570) HTML (121) PDF (450.33 K) (8408)
    • Research and application progress on underwater terrain-aided navigation technology

      ZHANG Jingyuan; SHEN Jian; LI Heng;RAO Zhe
      ZHANG Jingyuan; SHEN Jian; LI Heng;RAO Zhe.Research and application progress on underwater terrain-aided navigation technology[J].国防科技大学学报,2015,37(3):128-135

      AbstractBased on brief introduction of the conception of underwater terrain-aided navigation, the key problems and research progress of underwater terrain-aided navigation were introduced from the view of terrain aided navigation algorithm, underwater digital map technology, and experimentation. The direction of research and development of application was pointed out as well.

      Abstract (9062) HTML (146) PDF (492.40 K) (8427)