Delay dependent decentralized H∞ output feedback control for interconnected large-scale systems with uncertainty

Delay dependent decentralized robust H_infin control for a class of interconnected large-scale systems is considered. The time-delays are assumed as time-varying, and exist in interconnected and measurement output matrices. The decentralized output feedback H_infin controllers are designed. Combining the Lyapunov-Krasovskii functional approach and the delay integral inequality of matrices, the delay dependent sufficient conditions for the existence of robust decentralized H_infin control are presented in terms of nonlinear matrix inequalities (NMIs). Using the modified cone complementary linearization (CCL) algorithm, the delay dependent sufficient conditions for the existence of robust decentralized H_infin control are presented in terms of linear matrix inequalities(LMIs). The numerical simulation shows the validity of the main result.