Improved Results on Robust H∞ Control of Uncertain Discrete-time Systems with Time-varying Delay |
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基金项目: | supported by National Natural Science Foundationof China (No 60850004) |
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摘 要: | In this paper, the robust H∞ control problem for uncertain discrete-time systems with time-varying state delay is con- sidered. Based on the Lyapunov functional method, and by resorting to the new technique for estimating the upper bound of the difference of the Lyapunov functional, a new less conservative sufficient condition for the existence of a robust H∞ controller is obtained. Moreover, the cone complementary linearisation procedure is employed to solve the nonconvex feasibility problem. Finally, several numerical examples are presented to show the effectiveness and less conservativeness of the proposed method.
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关 键 词: | 鲁棒控制 离散时间系统 时间变化延迟 非线性矩阵不等式 |
收稿时间: | 2007-5-26 |
修稿时间: | 2008-9-26 |
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