On Fault Detection of NCSs Subject to Limited Communication Capacity

摘要

This paper addresses the problem of fault detection filter design for networked control systems (NCS) subject to limited communication capacity and a class of sensor stuck faults. Considering the communication limitations (e.g., measurement quantization, signal transmission delays, and data packet dropouts) and all possible sensor stuck faults, a unified mathematical model is first presented. Based on this framework, a full-order fault detection filter is designed such that the residual system is asymptotically stable with the prescribed attenuation level in the generalized H∞ sense. In order to further improve the detection performance, an optimization algorithm is proposed to minimize the threshold. Finally, a spring-mass-damper system is utilized to show the effectiveness of the proposed method.