Abstract
This paper aims at systematically addressing the two fundamental side effects induced inevitably by low-pass filtering: the phase lag and the low-frequency residual measurement errors. A novel two-module-structured robust feedback control framework is proposed, where a phase lag compensator and a measurement error estimator are incorporated. Both modules are designed based on the closed-loop system model in the frequency domain to generate the estimation signals for the phase lag and low-frequency residual errors, respectively. Then, two compensation signals (corresponding to the two estimation signals) are introduced in the controller to cancel out the phase lag and residual errors. Stability and performance analysis is provided based on a servomotor positioning system design example. Comparative simulation results are provided to show the advantages of the proposed approach over other classic approaches.
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Acknowledgment
This work was supported by the National Natural Science Foundation of China under Grant 61873215.
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Zhu, Y., Xu, L., Zhang, X., Yan, F. (2023). Model-Based Compensation for Phase Lag and Residual Measurement Error Induced by Low-Pass Filtering in Feedback Control Systems. In: Yan, L., Duan, H., Deng, Y. (eds) Advances in Guidance, Navigation and Control. ICGNC 2022. Lecture Notes in Electrical Engineering, vol 845. Springer, Singapore. https://doi.org/10.1007/978-981-19-6613-2_650
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DOI: https://doi.org/10.1007/978-981-19-6613-2_650
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