Fault detection filter design for networked control system with network delay

This paper is concerned with fault detection filter design of a class of discrete-time networked systems with delays. Based on the traditional fault detection filter, a novelty fault detection observer was designed to compensate the delay by iteration. The fault referencal model was introduced, a augmented residual system was derived. With the H_∞ theory, a fault detection scheme was proposed based on the H_∞ filter, and with the LMI, the observer gain and the post filter matrix could be got. Simulation results gave an illustration of the proposed design.