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http://dx.doi.org/10.20910/JASE.2019.13.3.1

Improvement of Low Speed Stability of CMG Gimbal Using Full-pitch Distributed Winding  

Lee, Jun-yong (Department of Aerospace and Mechanical Engineering, Korea Aerospace University)
Lee, Hun-jo (Department of Aerospace and Mechanical Engineering, Korea Aerospace University)
Oh, Hwa-suk (Department of Aerospace and Mechanical Engineering, Korea Aerospace University)
Song, Tae-Seong (LIGNEX1 Co. Ltd)
Kang, Jeong-min (LIGNEX1 Co. Ltd)
Song, Deok-ki (LIGNEX1 Co. Ltd)
Seo, Joong-bo (Defense Industry Technology Center, Agency for Defense Development)
Publication Information
Journal of Aerospace System Engineering / v.13, no.3, 2019 , pp. 1-8 More about this Journal
Abstract
The electromagnetic forces generate a torque on the gimbal motor, and changes in the coil current causes torque ripple. This affects the gimbals' speed and results to unstable satellite attitude. It is therefore essential to reduce the torque ripple of the gimble motor with the aim of improving the attitude control accuracy of the satellite. This paper theoretically analyzes the torque generated from the modeling of a motor for general concentrated winding and distributed winding. The prototype was designed and fabricated through selection of the winding that reduces the torque ripple through simulation results. The results of the magnetic fields' theoretical analysis and the back electromotive force of the prototype were compared with the calibrated results for verification of conformity and manufacture of the design. The low-speed test proved that the torque ripple is reduced by improving the speed stability.
Keywords
CMG; Gimbal; Coreless BLDC; Torque Ripple; Distributed Winding; Short Pitch Winding; Full Pitch Winding;
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Times Cited By KSCI : 3  (Citation Analysis)
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