Fault detection for discrete-time systems over signal to noise ratio constrained channels

This paper studies fault detection for the discrete-time systems with signal to noise ratio constrained channels. By using the descriptor system method, a fault detection strategy is proposed. First, in order to guarantee the residual generation system is admissible, an augmented robust fault detection filter is constructed, and the fault is estimated; then, a constant threshold is designed to detect the fault. Finally, a simulation example is given to show the applicability of the proposed approach.