Fault detection and fault tolerant control in finite frequency domain for networked control system

The problem of fault detection and fault tolerant control in finite frequency domain for networked control system with random time delay is investigated in this article. Considering the fault in finite frequency domain, the fault detection filter with prescribed performance is proposed. In order to ensure the control performance of the system, an active fault tolerant controller based on residual feedback is proposed to compensate the fault signal. The sufficient conditions of fault detection filter and active fault tolerant controller satisfying given performance in finite frequency domain are derived. The parameters of the fault detection filter and the active fault tolerant controller are solved by linear matrix inequalities. Numerical simulation shows the superiority and effectiveness of fault detection filter and fault tolerant controller.