多体卫星MIMO控制及稳定裕度研究  

On MIMO Control and Stability Margin of Multi-Body Satellite,China

作　　者：李信栋[1] 苟兴宇[1] 

机构地区：[1]北京控制工程研究所,北京100190

出　　处：《航天控制》2013年第5期25-30,共6页Aerospace Control

摘　　要：针对两输入两输出的多体卫星系统模型,采用并矢展开设计法这一多变量频域设计技术,实现卫星本体俯仰姿态和附件指向的多输入多输出(MIMO)控制,利用Nyquist稳定判据证明系统的稳定性;在此基础上讨论卫星本体姿态控制与附件指向控制带宽的关系,然后利用回差阵奇异值法计算MIMO控制系统的稳定裕度,并分析稳定裕度计算结果的保守性,数值仿真验证了算法的有效性以及稳定裕度分析结果的正确性。The pitch attitude and antenna pointing control of multi-body satellites are presented in this pa- per ,the stability margin of the multi-input multi-output （MIMO） linear control system is given. Firstly, the dyadic expansion method is utilized to design the controller based on the two-input two-output system model, and a stability analysis of the resulting closed-loop system is included through the Nyquist stability criterion. The relationship between the satellite attitude control bandwidth and the antenna pointing control bandwidth is studied. Secondly, the stability margin of the MIMO control system is obtained by computing the minimum singular value of the system return difference matrix. Finally the conservativeness of the stabil- ity margin is discussed, and simulation results are presented to show that this design technique is effective and the analysis is reasonable.

关 键 词：多体卫星 并矢展开设计法 回差阵奇异值 稳定裕度 卫星控制 

分 类 号：V448.22[航空宇航科学与技术—飞行器设计]