带梁式附件航天器姿态动力学的行波模型

将带梁式柔性附件航天器的附件振动作为波动研究。将附件按物理特性的差异划分成单元，弹性波在每一个单元内传播，并在结点处反射、散射。通过考虑单元间的边界条件可以得到姿态动力学的解析模型，并由此可以获得外扰动和姿态角到附件弹性位移之间的传递特性。与传统的以混合坐标表示的模型相比，此模型能够获得更全面、更精确的姿态动力学特性。

TRAVELLING WAVE MODEL FOR SPACECRAFT WITH BEAM-LIKE APPENDAGES

The elastic vibration of spacecraft with beam like appendages is studied as wave motion in this paper.The appendage is divided into members according to the difference of physical properties.Elastic waves propagate along each member,and reflect,scatter at junctions.Boundary conditions are used to assemble the global system model,and transfer properties from external disturbance or attitude to elastic deflection of appendages are obtained.Comparing with the conventional hybrid coordinate model,this model provides more detailed,more accurate dynamic properties.