Robust H∞ control of wireless NCS with delay and packet dropouts

A robust H∞ control of uncertain system with long time delay and multiple data packet dropouts is proposed in the paper. Delay and packet dropouts occur randomly in the actual networked control system. One sufficient condition is constructed in the paper to reflect both time-varying delay and packet drpouts, and probable multiple packet dropouts is dealt with the iterative ways. A non-fragile controller is obtained which can ensure system stability through a series of matrix inequalities. To show the effectiveness of the method, a simulation example is presented at the end.