Abstract
This paper designs a robust output feedback controller for input-saturated systems with parametric uncertainties and external disturbances based on the parametric Riccati equation and the sliding mode observer. The stability of the closed-loop system is ensured by the designed controller. The main advantages of the approach proposed in this paper are as follows: (a) the designed sliding mode observer can estimate unknown external disturbances and parametric uncertainties; (b) the designed output feedback controller can increase the state convergence speed; and (c) the control gain can be obtained from the solution of the parametric Riccati equation. The simulation results for a spacecraft rendezvous system illustrate the feasibility of the designed controller.
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Data sharing is not applicable to this article as no data sets were generated or analyzed during the current study.
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Acknowledgements
This work is supported by the Zhejiang Provincial Natural Science Foundation of China (LY18F030005), the National Natural Science Foundation of China (61503105, 61903312) and the China Postdoctoral Science Foundation (2018M632464).
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Wang, Q., Wu, ZG. Robust Output Feedback Control for Input-Saturated Systems Based on a Sliding Mode Observer. Circuits Syst Signal Process 40, 2267–2281 (2021). https://doi.org/10.1007/s00034-020-01584-7
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DOI: https://doi.org/10.1007/s00034-020-01584-7