H_∞ optimal control of a class of NCS with state-feedback

The H∞ optimal control problems of a class of networked control systems(NCS)is studied.The state-feedback is the most effective control mode,which combines system function and sensibility.Therefore,a class of state-feedback NCS with uncertain time-delay and limited energy disturbance input is modeled as the uncertain linear time-delay system.Then by using the Lyapunov theory and LMI,the problems about the H∞ optimal control are researched.The sufficient condition is first given for the robust stability of networked control system,and then the design methods of NCS state-feedback suboptimum and optimum H∞ control laws are obtained consequently.The simulation results show the feasibility and effectiveness of the results.