Fault detection for a class of nonlinear networked control systems |
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Authors: | Zehui Mao Bin Jiang Peng Shi |
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Affiliation: | 1. College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, People's Republic of China;2. Department of Computing and Mathematical Sciences, University of Glamorgan, Pontypridd CF37 1DL, U.K.;3. School of Engineering and Science, Victoria University, Australia;4. School of Mathematics and Statistics, University of South Australia |
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Abstract: | In this paper, an observer‐based fault detection (FD) method is presented for a class of nonlinear networked control systems (NCSs) with Markov transfer delays. Firstly, based on Euler approximate method, a nonlinear NCS model with uncertainty is proposed using the Takagi‐Sugeno (T‐S) fuzzy model. Some geometric conditions are given to transfer the NCS model into an output‐feedback form. Then, the H∞ FD observer is designed such that the estimation error (residual) converges to zero, if there exist no fault and uncertainty in the system, or the residual is minimized in the sense of H∞ norm, when system contains fault and uncertainties. Furthermore, to simplify the model, the approximate model without uncertainty is considered. Then, sufficient conditions for the existence of FD observer gain and the sampling time of NCSs are given to achieve the semiglobal practical property. An inverted pendulum example is used to illustrate the efficiency of the developed techniques. Copyright © 2009 John Wiley & Sons, Ltd. |
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Keywords: | fault detection networked control systems observer transfer delays |
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