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Open AccessArticle

High-Precision Speed Control Based on Multiple Phase-Shift Resonant Controllers for Gimbal System in MSCMG

by Jian Feng 1, Qing Wang 2 and Kun Liu 1,*
1
College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China
2
Shanghai Institute of Spaceflight Control Technology, Shanghai 210011, China
*
Author to whom correspondence should be addressed.
Energies 2018, 11(1), 32; https://doi.org/10.3390/en11010032
Received: 16 November 2017 / Revised: 18 December 2017 / Accepted: 19 December 2017 / Published: 1 January 2018
The high precision speed control of gimbal servo system in magnetically suspended control moment gyro (MSCMG) suffers from periodic torque disturbances, which lead to periodic fluctuations in speed control. This paper proposes a novel multiple phase-shift resonant controller (MPRC) for a gimbal servo system to suppress the periodic torque ripples whose frequencies vary with the operational speed of the gimbal servo motor and high-speed motor. First, the periodic torque ripples caused by cogging torque, flux harmonics and the dynamic unbalance of the high speed rotor are analyzed. Second, the principle and structure of MPRC parallel with proportional integral (PI) controllers are discussed. The design and stability analysis of the proposed MPRC plus PI control scheme are given both for the current loop and speed loop. The closed-loop stability is ensured by adjusting the phase in the entire operational speed range. Finally, the effectiveness of the proposed control method is verified through simulation and experimental results. View Full-Text
Keywords: gimbal servo system; magnetically suspended control moment gyro; periodic torque ripples; multiple phase-shift resonant controllers gimbal servo system; magnetically suspended control moment gyro; periodic torque ripples; multiple phase-shift resonant controllers
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MDPI and ACS Style

Feng, J.; Wang, Q.; Liu, K. High-Precision Speed Control Based on Multiple Phase-Shift Resonant Controllers for Gimbal System in MSCMG. Energies 2018, 11, 32.

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