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Mathematical Problems in Engineering
Volume 2014 (2014), Article ID 960437, 10 pages
Research Article

High-Accuracy and Fast-Response Flywheel Torque Control

1School of Instrument Science and Optoelectronics Engineering, Beihang University, Beijing 100191, China
2School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China
3China Aerospace Science and Technology Corporation, Beijing 100048, China

Received 4 June 2014; Revised 5 September 2014; Accepted 11 September 2014; Published 28 September 2014

Academic Editor: Kwok-Wo Wong

Copyright © 2014 Xinxiu Zhou et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Compared with current mode flywheel torque controller, speed mode torque controller has superior disturbance rejection capability. However, the speed loop delay reduces system dynamic response speed. To solve this problem, a two-degrees-of-freedom controller (2DOFC) which consists of a feedback controller (FBC) and a command feedforward controller (FFC) is proposed. The transfer function of FFC is found based on the inverse model of motor drive system, whose parameters are identified by recursive least squares (RLS) algorithm in real-time. Upon this, Kalman filter with softening factor is introduced for the improved parameters identification and torque control performances. Finally, the validity and the superiority of the proposed control scheme are verified through experiments with magnetically suspended flywheel (MSFW) motor.