Robust decentralized actuator fault detection and estimation for large-scale systems using a sliding mode observer |
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Authors: | Xing-Gang Yan |
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Affiliation: | 1. Control?&2. Instrumentation Research Group, Department of Engineering , University of Leicester , Leicester, LE1 7RH, UK |
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Abstract: | In this paper, robust decentralized actuator fault detection and estimation is considered for a class of non-linear large-scale systems. A sliding mode observer is proposed together with an appropriate coordinate transformation to find the sliding mode dynamics. Then, based on the features of the observer, a decentralized fault estimation strategy is proposed using an equivalent output error injection, and a decentralized reconstruction scheme follows by further exploiting the structure of the uncertainty which is allowed to have non-linear bounds. The estimation and reconstruction signals only depend on the available measured information and thus the proposed strategy can work on-line. The theoretical results which have been obtained are applied to an automated highway system. Simulation shows the feasibility and effectiveness of the proposed scheme. |
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Keywords: | discrete-time switched systems polytopic systems state feedback switched control LPV discrete-time systems control |
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