Fault detection for networked control system with data packet dropout

In this paper, fault detection for networked control system with data packet dropout between sensor and controller is discussed. A fault observer structure is presented, in which the previous system output transmitted successfully is used for feedback of the observer when data packet dropout happens. Suppose continuous data packet dropout is finite, the dynamics of the observer error can be modeled as a switched system. The stability condition of observer is provided and observer gain can be obtained by solving an LMI optimization problem. A simulation example shows the effectiveness of proposed method.