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Stability Analysis of Linear Systems with An Interval Time-varying Delay - A Delay-range-partition Approach

Xinghua Zhang, Yantao Wang*, and Xiaofei Fan
International Journal of Control, Automation, and Systems, vol. 15, no. 2, pp.518-526, 2017

Abstract : "In this paper, the stability analysis problem of linear systems with an interval time-varying delay is investigated. Firstly, an augmented Lyapunov-Krasovskii functional is constructed, which includes more information of the delay’s range and the delay’s derivative. Secondly, based on two improved integral inequalities which are less conservative than Jensen’s integral inequalities, a delay-range-partition (DRP) approach is proposed to estimate the upper bound of the derivative of the augmented Lyapunov-Krasovskii functional. Then, less conservative stability criteria in the form of linear matrix inequality (LMI) are established no matter whether the lower bound of delay is zero or not. Finally, to illustrate the effectiveness of the stability criteria proposed in this paper, two numerical examples are given, and their results are compared with the existing results."

Keyword : "Delay-dependent stability criterion, delay-range-partition (DRP) approach, integral inequality, linear time-delay systems. time-delay systems."

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