Fault diagnosis of distributed networked control system

In order to avoid the transmission delays and packet loss of the distributed networked control system (NCS) caused by the network overload, the packet-based transmission mechanism is introduced, and the center fault diagnosis unit is designed for this special structure. In the course of the design, the distributed NCS is regarded as multi-rate sampled-data system according to the difference of the sample periods and the packet sizes among the subsystems. The discrete model is obtained by using the lifting technique, based on which the state observer is designed to achieve the fault diagnosis of distributed NCS. Finally, simulation results show the effectiveness of the proposed method.