Fault estimation and tolerant control for discrete‐time switched systems with sojourn probabilities |
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Authors: | Rathinasamy Sakthivel Maya Joby Srimanta Santra Yong Ren |
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Affiliation: | 1. Department of Mathematics, Sungkyunkwan University, Suwon, South Korea;2. Department of Mathematics, Anna University Regional Campus, Coimbatore, India;3. Department of Mathematics, Anhui Normal University, Wuhu, China |
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Abstract: | This paper addresses the issue of fault estimation and accommodation for a discrete‐time switched system with actuator faults. Here, we assume that the sojourn probabilities are known a priori. By using the reduced‐order observer method, the sojourn probability approach, and the Lyapunov technique, a fault estimation algorithm is obtained for the considered system. The main objective of this work is to design a dynamic output feedback fault‐tolerant controller based on the obtained fault estimation information such that the closed‐loop discrete‐time switched system with available sojourn probabilities is robustly mean‐square stable and satisfies a prescribed mixed and passivity disturbance attenuation level in the presence of actuator faults. More precisely, a dynamic output feedback fault‐tolerant controller is established in terms of linear matrix inequalities. Finally, numerical examples are provided to illustrate the usefulness and effectiveness of the proposed design technique. |
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Keywords: | discrete‐time switched systems fault estimation mixed
and passivity sojourn probabilities |
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