挠性空间飞行器的双回路控制器设计

针对大型挠性空间结构频率低，阻尼小，铡体与各挠性模态之间互相耦合等特点，提出了一种双回路控制器的设计方法，回路的设计采用了最优滑动模态的变结构设计方法，且考虑了鲁棒稳定性问题。最后，给出了结果的数字仿真从仿真曲线可以看出，对于基于模态截断的大型挠性空间飞行器，该设计方法具有一定的鲁棒性。

A DOUBLE LOOPS CONTROLLER DESIGNMETHOD FOR LARGE FLEXIBLE SPACECRAFT

In this paper, a double loops controller design method is provided in accordancewith the characteristics of large flexible spacecraft, such as low frequency, low damping and coupling between rigid body and flexible appendages. Optimal sliding-modecontrol method is used, and robust stability is considered. Finallyg numerical simulations show that vibration suppression and accurate pointing are accomplishedby using two separate control loops with certain robust property. Based on modetruncation modle of the flexible spacecraft.