Abstract
For a class of uncertain systems, a fixed-time disturbance observer is suggested. The proposed observer not only estimated the disturbance but also ensured the fixed-time convergence, leading to the increased accuracy of the disturbance estimation together with the improved estimation speed. Taking the proposed observer in combination with a state-feedback controller and employing it in a fully actuated system, stabilization of the closed-loop system will be assured which allows the control of uncertain systems. With a numerical example to illustrate the efficacy of the scheme, finally, such scheme is successfully applied to the permanent-magnet speed control system, the results show that it has the advantages of rapid convergence speed and favorable control performance.
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Acknowledgements
This work was supported in part by the National Natural Science Foundation of China under Grant 52077027, and in part by the Department of Science and Technology of Liaoning province under Grant 2020020304-JH1/101.
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Wang, DZ., Sun, LS. & Sun, GF. Fixed-Time Disturbance Observer-Based Control for Uncertainty Systems Applied to Permanent-Magnet Speed Control. J. Electr. Eng. Technol. (2024). https://doi.org/10.1007/s42835-024-01836-5
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DOI: https://doi.org/10.1007/s42835-024-01836-5