Residual generation and evaluation of networked control systems subject to random packet dropout

• Published in: Automatica (Oxford) Vol. 45; no. 10; pp. 2427 - 2434
• Main Authors: Wang, Yongqiang, Ye, Hao, Ding, Steven X., Wang, Guizeng, Zhou, Donghua
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.10.2009; Elsevier
• Subjects: Applied sciences; Computer science; control theory; systems; Computer systems and distributed systems. User interface; Control systems; Control theory. Systems; Dropouts; Exact sciences and technology; Fault detection; Links; Mathematical models; Modelling and identification; Networked control systems; Observers; Packet dropout; Packets (communication); Parity; Process control. Computer integrated manufacturing; Residual evaluation; Residual generation; Software; Networked control systems; Fault detection; Residual generation; Residual evaluation; Packet dropout; Probabilistic approach; Measurement sensor; Distributed system; Random distribution; Optimization; False alarm rate; Reference model; Uncertain system; Observer; Distributed control; Robustness; System identification; Parity; Fault diagnostic; Non deterministic system; Actuator; Defect detection
• ISSN: 0005-1098; 1873-2836
• DOI: 10.1016/j.automatica.2009.06.031

In this paper, we address fault detection for networked control systems subject to random packet dropout. The packet dropout is assumed to be existing in the sensor-to-controller link and the controller-to-actuator link. Both parity space and observer based residual generation and evaluation approaches are proposed. In parity space based fault detection scheme, a new optimization index is proposed to deal with stochastic system parameters caused by random packet dropout, while in observer based scheme, this is accomplished by introducing a reference model. In order to evaluate performance of the designated threshold, the corresponding false alarm rate is given. The two fault detection schemes can ensure both robustness to packet dropout as well as disturbance and sensitivity to fault. An experimental study is employed to verify that the proposed method performs better than the existing approaches.