Abstract
Fault detection and isolation (FDI) problems for linear parameter-varying (LPV) systems with state time-delays are studied in this paper. By defining the concept of unobservability subspace and designing its calculation algorithm, the geometric approach is introduced to the time-delay LPV systems. Utilizing Wirtinger-based integral inequality, we obtain a sufficient condition to solve the so-called H∞-based residual generation problem for the LPV systems. In this paper, we consider two cases: the time delay is known and the time delay is unknown but its estimated value can be obtained. Corresponding observers are proposed for both cases based on the geometric approach and H∞ techniques. Lyapunov-Krasovskii functional is utilized to handle the time-delays and Wirtinger’s inequality is employed to reduce conservatism. Numerical examples are presented to demonstrate the effectiveness of the proposed approach.
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Acknowledgements
This work was supported by National Natural Science Foundation of China (Grant No. 61733009), National Key Research and Development Program of China (Grant No. 2022YFB25031103), and Huaneng Group Science and Technology Research Project.
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Zhang, Z., He, X. Fault detection and isolation for linear parameter-varying systems with time-delays: a geometric approach. Sci. China Inf. Sci. 66, 172202 (2023). https://doi.org/10.1007/s11432-022-3632-2
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DOI: https://doi.org/10.1007/s11432-022-3632-2