Kalman filter based fault diagnosis of networked cont rol system with white noise

The networked control system NCS is regarded as a sampled control system with output time- variant delay. White noise is considered in the model construction of NCS. By using the Kalman filter theory to compute the filter parameters ,a Kalman filter is constructed for this NCS. By comparing the output of the filter and the practical system ,a residual is generated to diagnose the sensor faults and the actuator faults. Finally ,an example is given to show the feasibility of the approach.