H-infinity and Exponential Stability of Nonlinear Nonautonomous Systems with Time-Varying Delay
- Publication Type:
- Journal Article
- Phat V and Ha Quang 2009, 'H-infinity and Exponential Stability of Nonlinear Nonautonomous Systems with Time-Varying Delay', Springer, vol. 142, no. 3, pp. 603-618.
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This paper addresses the design of H-infinity state feedback controllers for a class of nonlinear time-varying delay systems. The interesting features here are that the system in consideration is nonautonomous with fast-varying delays, the delay is also involved in the observation output, and the controllers to be designed satisfy some exponential stability constraints on the closed-loop poles. By using the proposed Lyapunov functional approach, neither a controllability assumption nor a bound restriction on nonlinear perturbations is required to obtain new sufficient conditions for the H-infinity control. The conditions are derived in terms of a solution to the standard Riccati differential equations, which allows for simultaneous computation of the two bounds that characterize the stability rate of the solution.
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