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介绍时滞系统Ｈ∞控制的状态空间方法．首先给出时滞系统Ｈ∞控制问题，然后基于Ｒｉｃｃａｔｉ方程的解，分别导出了基于状态反馈和输出反馈Ｈ∞控制器及其存在的条件．详细地阐述了时滞系统Ｈ∞控制器设计的基本思想．
State Space Method for H∞ Control of Delayed Systems. Firstly, the H∞ control problem of a time-delay system is given. Then based on the solution of Riccati equation, the H∞controller based on state feedback and output feedback and its existence conditions are derived respectively. The basic idea of H∞ controller design for a time-delay system is elaborated.