绳系卫星渐近稳定释放与回收策略

Asymptotic Stabilization for Deployment and Retrieval of a Tethered Satellite System

文章研究椭圆轨道下绳系卫星的稳定释放与回收控制问题。首先基于Lyapunov稳定性理论,获得椭圆轨道下系绳释放和回收的速率控制律及稳定性条件,然后提出一套能使系绳沿期望俯仰角进行渐近稳定释放和回收控制的方法。指出存在一个轨道区间,可以实现对通常不稳定的回收过程进行稳定回收,进而提出分区间和分段回收策略以优化回收控制效果。最后,通过数值模拟对所提出的控制律、稳定条件及控制策略进行验证。

An asymptotic stability strategy for deployment and retrieval of a tethered satellite system in elliptical orbits was studied Firstly, the stability of an in-plane tethered satellite system moving in an elliptical orbit was analyzed, a novel rate control for stabilizing the deployment and retrieval was obtained, and the stability conditions for the control were given based on Lyapunov stability theory. Then, a rate-based control method to suppress the large swing around the local vertical position of tethered satellite system was presented. Under such control strategy, the deployment and retrieval of the tether made an asymptotic stable motion towards to the preassigned pitch angle. The results show that there exists an orbital region, on which the retrieval process can keep asymptotic stability. To optimize the effect of retrieval control, the partitioning and segmenting strategies Finally, the proposed control law, stability conditions, demonstrated by the numerical simulations. on the orbit were proposed. and control strategies were