Delay-range-dependent Stability Criterion for Interval Time-delay Systems with Nonlinear Perturbations

查看全文 作　　者：[1]K.Ramakrishnan;[1]G.Ray

机构地区：[1]Department of Electrical Engineering, Indian Institute of Technology

出　　处：《International Journal of Automation and computing》索引2011年第8卷第1期,共6页

摘　　要：In this paper, we consider the problem of robust stability for a class of linear systems with interval time-varying delay under nonlinear perturbations using Lyapunov-Krasovskii (LK) functional approach. By partitioning the delay-interval into two segments of equal length, and evaluating the time-derivative of a candidate LK functional in each segment of the delay-interval, a less conservative delay-dependent stability criterion is developed to compute the maximum allowable bound for the delay-range within which the system under consideration remains asymptotically stable. In addition to the delay-bi-segmentation analysis procedure, the reduction in conservatism of the proposed delay-dependent stability criterion over recently reported results is also attributed to the fact that the time-derivative of the LK functional is bounded tightly using a newly proposed bounding condition without neglecting any useful terms in the delay-dependent stability analysis. The analysis, subsequently, yields a stable condition in convex linear matrix inequality (LMI) framework that can be solved non-conservatively at boundary conditions using standard numerical packages. Furthermore, as the number of decision variables involved in the proposed stability criterion is less, the criterion is computationally more effective. The effectiveness of the proposed stability criterion is validated through some standard numerical examples. 关键词：稳定性判据非线性扰动时滞系统区间 LYAPUNOV 计算软件包线性矩阵不等式稳定性准则

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Delay-range-dependent Stability Criterion for Interval Time-delay Systems with Nonlinear Perturbations

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