Design and Analysis of Fault Diagnosis and Fault-tolerant Control for a Class of MIMO Nonlinear State Systems |
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Authors: | Sunan HUANG and Kok Kiong TAN |
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Affiliation: | Temasek Laboratories, National University of Singapore, Singapore 117411 and Electrical and Computer Engineering Department, National University of Singapore, Singapore 117583 |
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Abstract: | This paper presents a fault diagnosis and fault-tolerant control algorithm, which can be used for a class of multi-input multi-output (MIMO) nonlinear state systems. First, a state estimator is proposed, which is able to detect fault occurrence, by using a residual signal. Second, when the state is at an abnormal condition, the fault-tolerant control will be triggered to minimize the impact of the fault occurrence. This fault-tolerant control is designed by using a robust controller (original controller), and an on-line approximator to capture a nonlinear function that indicates the fault occurrence. The detailed analysis is given for the proposed fault accommodation control. |
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Keywords: | Fault Diagnosis Fault Detection Nonlinear Observer On-line Approximator Fault-tolerant Control. |
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