一种在轨可展开天线的多柔体动力学建模与计算  

Flexible Multi-Body Dynamics Modeling and Calculation of a Deployable Space Antenna in Orbit

作　　者：朱文璁 宋晓东[1] 单明贺 田强[1] Zhu Wencong;Song Xiaodong;Shan Minghe;Tian Qiang(School of Aerospace Engineering,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京理工大学宇航学院,北京100081

出　　处：《动力学与控制学报》2024年第3期14-25,共12页Journal of Dynamics and Control

基　　金：国家自然科学基金资助项目(11832005);国家杰出青年科学基金资助项目(12125201)。

摘　　要：研究了一种考虑重力梯度的大型空间可展开天线桁架的动力学建模与计算问题.使用绝对节点坐标法和绝对节点坐标参考节点法建立了可展开结构的刚柔耦合动力学模型.利用离散方向导数构建了动力学方程的保能量动量时间积分算法,通过计算获得了含有多个模块的大型空间可展开天线在轨展开以及展开后轨道机动过程轨道-姿态-变形耦合动响应.通过数值计算结果与经典算例结果、商业软件ADAMS计算结果的对比分析验证了提出方法的正确性.The dynamic modeling and calculation of a large deployable space antenna truss are studied considering of gravity gradient.Based on the absolute nodal coordinate formulation method and the absolute nodal coordinate formulation reference node method,the rigid-flexible coupling dynamic model of the deployable structure is established.The energy-momentum conserving time integrator for calculating the dynamic equations is constructed by using discrete directional derivative.The orbital-attitude-deformation coupling dynamic response of the large deployable space antenna with multiple modules is obtained.The presented method is verified by comparing the results with those of the classic example and the commercial software ADAMS.

关 键 词：重力梯度 绝对节点坐标法 刚柔耦合结构 展开动力学 保能量动量时间积分算法 

分 类 号：O313.7[理学—一般力学与力学基础]