An Event-Triggered Fault Detection Method for State-Saturated Systems with Time-Delay and Nonlinearities

The fault detection problem is addressed in this paper for a class of state-saturated systems with time-delay and nonlinearities under communication constraints. In particular, the phenomenon of state saturation is introduced to characterize the physical limitations of the device. Moreover, the event-triggered communication strategy is adopted to achieve the purpose of saving network resources and preventing data conflicts. Subsequently, an event-based fault detection filter is constructed. By selecting the appropriate Lyapunov functional, several sufficient conditions are obtained such that the addressed augmented system is globally asymptotically stable with a satisfactory H
∞
performance index. Besides, the filter parameters are gained through solving certain matrix inequalities. Finally, the effectiveness of the proposed fault detection approach is demonstrated by a numerical example.