Fault detection and diagnosis of networked control system

Abstract

Consider the plant of Multiple-input Networked Control System (NCS) with long reduced delay. The effect of the disturbances to the NCS is discussed and the iterative method is used to compensate the delay when design a reduced-order state observer with a γ-stability margin (0 < γ < 1) for system. By computing the residual between the output of the practical system and the output of the reduced-order state observer, the fault detection and diagnosis scheme of NCS is given. An illustrative example shows the effectiveness of the method.