带有姿态的绳系航天器混沌运动实验研究

利用地面物理仿真平台研究了绳系航天器的混沌动力学行为. 首先, 根据天地动力学相似原理, 通过对卫星仿真器施加喷气力和动量轮力矩来模拟空间动力学环境, 提出了两种等效方案, 给出了它们各自适用的实验工况. 数值结果表明, 在轨绳系航天器在一定的参数条件下系绳摆动为周期或概周期运动、航天器姿态发生混沌运动. 物理仿真验证了等效方案的有效性, 揭示了绳系航天器的混沌运动特征, 表明在阻尼力矩的作用下可以避免绳系航天器混沌运动的发生. 

EXPERIMENTAL VERIFICATION OF CHAOTIC ATTITUDE MOTION OF TETHERED SPACECRAFT SYSTEM

The paper studies chaotic motions of a tethered spacecraft by utilizing the ground-based experimental system. Based on the dynamics similarity principle, the dynamic equivalent model between the on-orbit tethered spacecraft and its ground experiment system are obtained. The space dynamics environment of the tethered spacecraft is simulated with the help of thrust forces and torque of momentum wheel on satellite simulator. Numerical simulations of the on-orbit tethered spacecraft show that the pitch motion of the tether is period or quasi-period one, while the attitude motion of the mother spacecraft behaves chaotic motion. The numerical results are verified based on the ground-based experimental system. The experiment shows that the torque of momentum wheel with a negative damping is able to suppress the chaotic motion.