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研究多挠性充液卫星姿态运动的低阶鲁棒控制器设计问题．综合应用模态截断、Ｈ∞回路成形和Ｈ∞氏平衡截断方法设计低阶鲁棒控制器．模态截断获得适当阶数的卫星姿态运动模型；Ｈ∞回路成形方法设计鲁棒控制器；Ｈ∞平衡截断技术实现控制器降阶．满阶对象和低阶控制器组成闭环进行计算机仿真．
Low Order Robust Controller Design Problem for Attitude Motion of Flexible Liquid Filled Satellite. The low-order robust controller is designed by modal truncation, H∞ loop shaping and H∞ equilibrium truncation. Modal truncation to obtain the appropriate order of satellite attitude motion model; H∞ loop shaping method to design a robust controller; H∞ balanced truncation technique to reduce the controller. Full-order object and low-order controller form a closed-loop computer simulation.