| 发动机谐振与箭体模态耦合稳定性及机理研究 |
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| 引用本文： | 李家文,李道奎,周建平.发动机谐振与箭体模态耦合稳定性及机理研究[J].航空学报,2011,32(5):822-832. |
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| 作者姓名： | 李家文 李道奎 周建平 |
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| 作者单位： | 国防科学技术大学航天与材料工程学院,湖南长沙,410073 |
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| 摘 要： | 针对发动机谐振可能与箭体弹性振动之间发生耦合共振,从而引起姿态控制系统不稳定的问题,首先将发动机谐振特性简化为一个二阶环节,建立了包含发动机谐振方程的火箭姿态动力学模型;然后分析了发动机谐振对箭体模态极点频率和阻尼比的影响,并从理论上分析了出现负阻尼比时发动机和箭体模态间的耦合共振机理,在此基础上计算了导致姿态控制系统...
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| 关 键 词： | 运载火箭 发动机谐振 耦合共振 箭体模态 共振频率边界 |
| 收稿时间： | 2010-05-25; |
Study on Coupling Stability and Mechanism Between Engine Harmonic Oscillation and Launch Vehicle's Modes |
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| LI Jiawen,LI Daokui,ZHOU Jianping.Study on Coupling Stability and Mechanism Between Engine Harmonic Oscillation and Launch Vehicle's Modes[J].Acta Aeronautica et Astronautica Sinica,2011,32(5):822-832. |
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| Authors: | LI Jiawen LI Daokui ZHOU Jianping |
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| Institution: | LI Jiawen,LI Daokui,ZHOU Jianping College of Aerospace and Material Engineering,National University of Defense Technology,Changsha 410073,China |
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| Abstract: | In consideration of the instability of attitude control system caused by coupling resonance between engine harmonic oscillation and launch vehicle's elastic vibration,dynamic coupling stability and mechanism between engine harmonic oscillation and launch vehicle's modes are studied,and the engine harmonic oscillation frequency boundary due to the instability of attitude control system is also computed.Firstly,the dynamics of engine oscillation is simplified as a second order system,and an attitude dynamic m... |
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| Keywords: | launch vehicles engine harmonic oscillation coupling resonance launch vehicle's modes resonance frequency boundary |
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