Abstract:

A fault detection method based on a combination of event-triggered mechanism and Delta operator is used for the fault problems caused by time delay and packet loss in the network due to bandwidth limitation of the communication network in the case of high-speed sampling of the network control system. In this study, while co-designing the fault detection filter and the controller, the construction vector is added to the Delta operator filter model to avoid the generation of bilinear terms in the parameter design. Constructing Lyapunov-Krasovskii generalized connotations of the δ-domain for the stability and H_∞ performance of the residual system. The numerical simulation example verifies the effectiveness of the proposed event triggering mechanism and demonstrates its high sensitivity to faults by the residual evaluation function.

Key words: network control system, fault detection, Delta operator, network delay, network packet loss, event triggering mechanism, residual system, H_∞ performance, residual evaluation function