| 引用本文: | 李家文,李恩奇,李道奎,等.两种捆绑火箭弹性振动建模方法对比分析及其对姿控系统的影响.[J].国防科技大学学报,2010,32(4):42-48.[点击复制] |
| LI Jiawen,LI Enqi,LI Daokui,et al.Comparative Analysis of Two Types of Strap-on Launch Vehicle's Elastic Vibration Modeling Method and the Influence on Attitude Control System[J].Journal of National University of Defense Technology,2010,32(4):42-48[点击复制] |
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| 两种捆绑火箭弹性振动建模方法对比分析及其对姿控系统的影响 |
| 李家文1, 李恩奇2, 李道奎1, 周建平1 |
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(1.国防科技大学 航天与材料工程学院，湖南 长沙 410073;2.第二炮兵装备研究院 第五研究所，北京 100085)
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| 摘要: |
| 针对长助推和短助推两种类型捆绑火箭的不同模态特点，分析了两者弹性振动建模方法的区别和联系，在此基础上建立了某型固体捆绑火箭姿态动力学新模型，模型中基于有限元法导出了弹性振动方程，基于该模型对箭体复杂弹性振动引起的通道间耦合进行了研究，采用逆Nyquist阵列法进行设计。结果表明，该模型能更准确地反映捆绑火箭纵、横、扭耦合运动特性；新模型三通道之间存在弹性耦合，但耦合矩阵具有对角优势性质，采用逆Nyquist阵列法进行姿控系统设计是有效的，仿真结果表明设计的控制器可行，能够取得比较好的性能。 |
| 关键词: 捆绑火箭 姿态动力学模型 弹性振动 有限元法 一维梁理论 逆Nyquist阵列法 |
| DOI： |
| 投稿日期：2010-03-18 |
| 基金项目: |
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| Comparative Analysis of Two Types of Strap-on Launch Vehicle's Elastic Vibration Modeling Method and the Influence on Attitude Control System |
| LI Jiawen1, LI Enqi2, LI Daokui1, ZHOU Jianping1 |
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(1.College of Aerospace and Materials Engineering, National Univ. of Defense Technology， Changsha 410073, China;2.The Fifth Research Institute, Academy of the Second Artillery, Beijing 100085, China)
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| Abstract: |
| In view of the different characteristics of modes between long and short strap-on launch vehicles, the differences and relations of elastic vibration modeling method of them were analyzed firstly. Then a new attitude dynamic model of solid strap-on launch vehicle was derived, the elastic vibration equation in the model was also derived by finite element method. Finally, the coupling among three channels based on the new model was studied. Inverse Nyquist Array method was used to design the controller. The results show that the new model can reflect more exactly the coupling characteristics of longitudinal, lateral and torsinal vibration of strap-on launch vehicle. Although the coupling among three channels exists, the coupling matrix has the diagonal dominance characteristics and the controller designed by Inverse Nyquist Array method can obtain a good performance. |
| Keywords: strap-on launch vehicle model of attitude dynamics elastic vibration finite element method one dimensional beam theory Inverse Nyquist Array method |
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