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系统模态下柔性航天器混合坐标动力学方程 被引量:1

Hybrid Coordinate Dynamic Modeling of Flexible Spacecraft in Terms of System Modes
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摘要 首先建立了采用任意浮动参考系时的柔性航天器动力学方程; 然后选择连体坐标系为浮动参考系, 解所得到的动力学方程的特征值问题, 得到整个航天器系统的系统模态。通过模态变换, 得到用连体系刚体位移和系统模态坐标表示的混合坐标航天器动力学方程。与通常采用部件模态得到的混合坐标动力学方程不同, 这时弹性运动方程中不存在来自刚体运动的惯性耦合项; 同时也和采用系统自由弹性模态不同, 这时刚体坐标直接反映航天器刚体运动。论文最后给出了两个算例。 The dynamic equations of flexible spacecraft are derived by introducing a moving coordinate frame.Choosing body frame as moving coordinate frame,the vehicle system modes are obtained by solving the eigenvalue problem of the derived dynamic equations.The hybrid coordinate dynamic equation are then acquired by describing deformation with system modes.It is noted that there is on inertial coupling from the rigid coordinate in the elastic equation and the rigid coordinate direct reflects the rigid motion of spacecraft in contrast to using free modes.Finally,two illustrative examples are given.
出处 《中国空间科学技术》 CSCD 北大核心 2000年第1期18-23,35,共7页 Chinese Space Science and Technology
关键词 柔性航天器 模态分析 动力学方程 建模 混合坐标 Flexible spacecraft Modal analysis Kinetic equation
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参考文献4

  • 1Likins P W.Finite element appendage equations for hybrid coordinate dynamic analysis[].Int J Solids and Structures.1972
  • 2Meirovitch L.Hybrid state equations of motion for flexible bodies in terms of quasi -coordinates[].Journal of Guidance Control and Dynamics.1991
  • 3Meirovitch L,Nelson H D.High spin motion of a satellite containing elastic parts[].Journal of Space.1966
  • 4Likins P W.Dynamics and control of flexible space vehicles[]..1970

同被引文献10

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  • 8缪炳祺,曲广吉,夏邃勤.柔性航天器的模态综合-混合坐标动力学建模[J].浙江工业大学学报,2002,30(2):139-142. 被引量:10
  • 9缪炳祺,曲广吉,夏邃勤,程道生.柔性航天器动力学建模的伪坐标形式Lagrange方程[J].中国空间科学技术,2003,23(2):1-5. 被引量:8
  • 10徐小胜,于登云,曲广吉.模态价值分析在航天器模型降阶中的应用研究[J].中国空间科学技术,2003,23(6):1-6. 被引量:6

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