Improved stability conditions for time-varying delay systems via relaxed Lyapunov functionals

被引:8
作者
Wang, Xin [1 ]
Sun, Jian [1 ,2 ]
Wang, Gang [1 ,2 ]
Dou, Lihua [1 ,2 ]
机构
[1] Beijing Inst Technol, State Key Lab Intelligent Control & Decis Comple, Beijing 100081, Peoples R China
[2] Beijing Inst Technol, Chongqing Innovat Ctr, Chongqing 401120, Peoples R China
基金
国家重点研发计划; 中国国家自然科学基金;
关键词
Time-varying delay; stability; relaxed Lyapunov functionals; INEQUALITY APPLICATION; LINEAR-SYSTEMS; MATRIX;
D O I
10.1080/00207179.2022.2056716
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
In this paper, the stability analysis of linear systems with time-varying delays is studied. A novel Lyapunov method is presented, in which positive definiteness of the matrices in common Lyapunov functionals is relaxed by adding what is referred to as a zero-integral functional (ZIF). A general form of auxiliary polynomial-based functionals that contains such ZIF is given. Choosing polynomials of different order as well as exploring double-delay-product (DDP) terms, novel Lyapunov functionals are constructed, which contribute to a set of improved stability conditions expressed in terms of linear matrix inequalities. Finally, numerical examples are provided to corroborate the merits of the proposed method relative to a number of existing methods, and in particular, the effectiveness of the proposed ZIFs and DDP terms in reducing the conservatism of stability conditions.
引用
收藏
页码:1568 / 1581
页数:14
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