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Robust Current and Torque Controls for PMSM Driven Satellite Reaction Wheel

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6 Author(s)
Chou, M.C. ; Nat. Tsing Hua Univ., Hsinchu, Taiwan ; Liaw, C.M. ; Chien, S.B. ; Shieh, F.H.
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This paper presents the robust current and torque controls for a satellite reaction wheel system driven by permanent magnet synchronous motor (PMSM) is presented. First, the motor nominal key parameters are estimated, and the digital signal processing (DSP)-based PMSM driven reaction wheel system using intelligent power module is established. In the proposed robust current controlled pulsewidth modulated (PWM) scheme, the feedback controller is augmented with a command feedforward controller and a simple observed disturbance robust cancellation controller. Theoretic bases and design procedures of all constituted controllers are derived in detail. The proposed control scheme is very effective in handling sinusoidal PMSM varying-frequency winding current tracking control under sinusoidal back electromotive force (EMF) disturbance. Very close and robust PMSM winding current tracking performance under varying system parameters and operating conditions can be obtained. With excellent winding current control characteristics, the robust torque control of the PMSM driven reaction wheel is then performed to yield quick observed torque control response. The driving performance of the developed reaction wheel is evaluated experimentally, the improved torque generating capability and energy conversion efficiency are confirmed from some measured results.

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Aerospace and Electronic Systems, IEEE Transactions on  (Volume:47 ,  Issue: 1 )