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时变时滞不确定离散奇异切换系统的鲁棒H_∞滤波

Robust H_∞ filter design for discrete-time singular switched systems with uncertainties and time-varying delays
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摘要 研究了含参数不确定的时变时滞离散奇异切换系统的鲁棒H∞滤波问题。利用受限系统等价变换和引进新状态变量,将所讨论的奇异滤波误差系统等价转换为时滞离散标准切换系统。然后构建了一个新颖的Lya-punov—Krasovskii函数。通过对转换后的系统进行讨论,采用线性矩阵不等式形式得到了判定系统正则、因果和一致渐近稳定的充分条件,以及对所允许的不确定性满足H∞性能的滤波器设计方法。所得到的结果具有较小的保守性。最后,通过数值算例验证了本文方法的有效性。 The problem of robust H~ filter design for discrete-time singular switched systems with parametric uncertainties and time-varying delays is discussed. Based on the restricted system equivalent (r. s. e. ) transformation and by introducing new state vectors, the singular filtering error system is transformed into a time-delay standard switched system. The transformed system is then discussed by constructing a novel Lyapunov-Krasovskii functional. A sufficient condition for the filtering error system to be regular, causal and uniformly asymptotically stable and to satisfy H∞ performance for all admissible uncertainties is established in terms of linear matrix inequalities ( LMIs), and the corre- sponding filter design is derived. The obtained results are less conservative. A numerical example is given which illustrates the effectiveness of the new theory.
出处 《山东大学学报(理学版)》 CAS CSCD 北大核心 2012年第7期59-69,共11页 Journal of Shandong University(Natural Science)
基金 国家自然科学基金资助项目(61074037)
关键词 H∞滤波 离散奇异切换系统 时变时滞 不确定 线性矩阵不等式(LMI) H∞ filter discrete-time singular switched system time-varying delay uncertain linear matrix inequality(LMI)
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