Title |
Stability of Time-delayed Linear Systems using an Improved Integral Inequality |
DOI |
https://doi.org/10.5370/KIEE.2017.66.5.806 |
Keywords |
Stability ; Time-delay ; LMI ; Improved Integral inequality ; Free weighting matrix ; Augmented LKF |
Abstract |
This paper considers the delay-dependent stability of linear systems with a time-varying delay in the frame work of Lyapunov-Krasovskii functional(LKF) approach. In this approach, an integral inequality is essential to estimate the upper bound of time-derivative of LKF, and a less conservative one is needed to get a less conservative stability result. In this paper, based on free weighting matrices, an improved integral inequality encompassing well-known results is proposed and then a stability result in the form of linear matrix inequality is derived based on an augmented LKF. Finally, two well-known numerical examples are given to demonstrate the usefulness of the proposed result. |