卫星姿控系统的鲁棒H_2/H_∞混合控制问题研究  

The H_2/H_∞ Robustness Mix Control for Satellite Attitude Control System

作　　者：刘善伍[1] 张学钢[1] 陈宏宇[1] 

机构地区：[1]上海微小卫星工程中心,上海200050

出　　处：《航天控制》2017年第4期37-41,共5页Aerospace Control

摘　　要：针对一类范数有界不确定性卫星姿态采样系统,研究了鲁棒H_2/H_∞控制问题,给出了卫星姿态控制系统鲁棒稳定的充要条件及相应的鲁棒H_2/H_∞保性能状态反馈控制律和最优鲁棒H_2/H_∞保性能状态反馈控制律,控制律的求取通过借助一类线性矩阵不等式(LMI),或通过求取满足线性矩阵不等式约束的优化问题,避免了以往使用Lyapunov矩阵求解的保守性。仿真结果表明,系统在受到扰动后仍然是稳定的。In this paper, the H2/H∞ robustness mix control for a class of sampled - data systems is re- searched for satellite attitude control whose underlying continuous -time systems are subjected to uncertain- ties, and prerequisites of robust stability and the corresponding robust control law are derived. The acquisi- tion of control law is designed by solving a class of linear matrix inequalities （LMI） or a dynamic optimiza- tion with LMI constraints respectively. The method is less conservative than Lyapunove matrix method. An example is shown that system disturbed is stable.

关 键 词：姿态控制 采样系统 鲁棒H2/H∞控制 线性矩阵不等式 

分 类 号：V249.1[航空宇航科学与技术—飞行器设计]