太阳电池阵展开与锁定过程的多体动力学分析

柔性太阳电池阵展开动力学分析一般将板间的铰链视为理想铰,展开到位时施加与角度相关的撞击力矩模拟锁定过程.本文采用多体动力学方法,在动力学建模时将板间铰链视为物体,考虑太阳电池阵的刚柔耦合效应,基于Hertz接触理论,建立锁销和锁槽的碰撞模型.然后实现了太阳电池阵展开锁定全过程的动力学数值仿真,并研究了碰撞模型中参数的选取对仿真结果的影响.研究结果表明,碰撞参数的选取不仅影响铰间碰撞力的大小,还会影响整个系统锁定后的频率响应.最后给出了如何选取碰撞参数进行太阳电池阵展开与锁定动力学仿真的策略.

Multibody dynamic analysis on deployment and lock-up process of solar arrays

The dynamic analysis of flexible solar array generally treats the hinges between the plates as ideal hinges, and applies the angle dependent impact torque to simulate the locking process. In this paper, the multi body dynamics method is used to regard the inter plate hinge as a body in the dynamic modeling. Considering the rigid flexible coupling effect of the solar array, the contact model of the locking pin and the locking groove is established based on Hertz contact theory. Then, the dynamic simulation of the whole process of solar cell array locking is realized, and the influence of the parameters in the contact model on the simulation results is studied. The results show that the choice of contact parameters not only affects the size of the collision force, but also affects the frequency response of the whole system after locking. Finally, the computational strategy of how to choose the contact parameters for the dynamic simulation of deployment and locking of solar array is given.