Fault Detection for a Class of Closed-Loop Systems with Distributed Measurements

Abstract

Abstract:

Abstract： The fault detection problem for a class of closed-loop systems with distributed measurements was considered in the paper. The unmodeled dynamics was taken into account, and thus the feedback control would directly influence the residual signal and the fault detection performance. As a result, the feedback control law was considered in the design of the proposed residual generator. The addressed systems were monitored by multiple distributed sensors, each of which could communicate with its neighboring nodes. In the presence of the unmodeled dynamics and distributed measurements, a least mean-square distributed residual generator was designed, where each node could obtain the residual signals and detect the possible faults based on not only local measurements but also measurements transmitted from its neighboring nodes. The algorithm could be carried out in a recursive way and thus is suitable for online application. A numerical example was provided to show the effectiveness of the proposed strategy.

Key words: closed-loop system, distributed measurements, fault detection

CLC Number:

TP 273

LIU Yang,HE Xiao,ZHOU Donghua. Fault Detection for a Class of Closed-Loop Systems with Distributed Measurements[J]. Journal of Shanghai Jiaotong University, 2015, 49(06): 757-761.

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