TAILIEUCHUNG - Hindawi Publishing Corporation Advances in Difference Equations Volume 2010, Article ID 494607, 14

Hindawi Publishing Corporation Advances in Difference Equations Volume 2010, Article ID 494607, 14 pages doi: Research Article Riccati Equations and Delay-Dependent BIBO Stabilization of Stochastic Systems with Mixed Delays and Nonlinear Perturbations Xia Zhou and Shouming Zhong School of Mathematical Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 611731, China Correspondence should be addressed to Xia Zhou, zhouxia44185@ Received 21 August 2010; Accepted 9 December 2010 Academic Editor: T. Bhaskar Copyright q 2010 X. Zhou and S. Zhong. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any. | Hindawi Publishing Corporation Advances in Difference Equations Volume 2010 Article ID 494607 14 pages doi 2010 494607 Research Article Riccati Equations and Delay-Dependent BIBO Stabilization of Stochastic Systems with Mixed Delays and Nonlinear Perturbations Xia Zhou and Shouming Zhong School of Mathematical Sciences University of Electronic Science and Technology of China Chengdu Sichuan 611731 China Correspondence should be addressed to Xia Zhou zhouxia44185@ Received 21 August 2010 Accepted 9 December 2010 Academic Editor T. Bhaskar Copyright 2010 X. Zhou and S. Zhong. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. The mean square BIBO stability is investigated for stochastic control systems with mixed delays and nonlinear perturbations. The system with mixed delays is transformed then a class of suitable Lyapunov functionals is selected and some novel delay-dependent BIBO stabilization in mean square criteria for stochastic control systems with mixed delays and nonlinear perturbations are obtained by applying the technique of analyzing controller and the method of existing a positive definite solution to an auxiliary algebraic Riccati matrix equation. A numerical example is given to illustrate the validity of the main results. 1. Introduction In recent years Bounded-Input Bounded-Output BIBO stabilization has been investigated by many researchers in order to track out the reference input signal in real world see 1-6 and some references therein. On the other hand because of the finite switching speed memory effects and so on time delays are unavoidable in technology and nature commonly exist in various mechanical chemical engineering physical biological and economic systems. They can make the concerned control system be of poor performance and instable which cause the hardware .

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