On the time-varying Halanay inequality with applications to stability analysis of time-delay systems |
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| Authors: | Haifang Li Bin Zhou Mingzhe Hou Guangren Duan |
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| Institution: | 1. School of Automation, Nanjing University of Science and Technology, Nanjing 210094, PR China;2. School of Science, Huzhou Teachers College, Huzhou 313000, PR China;3. School of Electrical Engineering and Automation, Qufu Normal University, Rizhao 276826, PR China;1. Division of Electronic Engineering, Jeonbuk National University, 567 Baekje-daero, Jeonju 54896, Republic of Korea;2. Center for Global Conversing Humanities, Kyung Hee University, 1732 Deogyeong-daero, Yongin 17104, Republic of Korea;3. Department of Electrical Engineering, Yeungnam University, Gyongsan 38541, Republic of Korea |
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| Abstract: | The main results of the paper are improvements on the stability analysis of Halanay inequalities with time-varying coefficients in both continuous-time and discrete-time setting. Three classes of improved conditions are established to ensure that the solution to the Halanay inequality is uniformly exponentially stable. The merit of the proposed new conditions is that the coefficients of the Halanay inequality can be unbounded and sign indefinite. This is achieved by using the notion and properties of uniformly asymptotic stable (UAS) functions. Based on the improved stability conditions for the Halanay inequality and the Lyapunov Razumikhin approach, three classes of sufficient conditions are established for testing the stability of time-varying time-delay systems. Finally, the advantages of the proposed methods are illustrated by some numerical examples with some of them borrowed from the literature. |
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