Composite fault-tolerant control with disturbance observer for stochastic systems with multiple disturbances |
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| Authors: | Shixiang Sun Xinjiang Wei Huifeng Zhang Hamid Reza Karimi Jian Han |
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| Institution: | 1. School of Mathematics and Statistics Science, Ludong University, Yantai, Shandong 264025, China;2. Department of Mechanical Engineering, Politecnico di Milano, Milan 20156, Italy |
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| Abstract: | In this paper, a composite fault tolerant control (CFTC) with disturbance observer scheme is considered for a class of stochastic systems with faults and multiple disturbances. The disturbances are divided into two parts. One represents the stochastic disturbance with partial known information which is formulated by an exogenous system. The other is independent Wiener process. A stochastic disturbance observer is designed to estimate exogenous disturbance. To make the first type of disturbance can be rejected and the fault can be diagnosed, a composite fault diagnosis observer with disturbance observer is constructed. Furthermore, a composite fault-tolerant controller is proposed to compensate disturbances and faults. Finally, simulation examples are given to demonstrate the feasibility and effectiveness of the proposed scheme. |
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| Keywords: | Corresponding author |
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