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

Jian Feng, Qing Wang and Kun Liu
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Jian Feng: College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China
Qing Wang: Shanghai Institute of Spaceflight Control Technology, Shanghai 210011, China
Kun Liu: College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China

Energies, 2018, vol. 11, issue 1, 1-19

Abstract: 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.

Keywords: gimbal servo system; magnetically suspended control moment gyro; periodic torque ripples; multiple phase-shift resonant controllers (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
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