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Title: Precision motion control with disturbance observer for pulsewidth-modulated-driven permanent-magnet linear motors
Authors: Tan, K.K. 
Lee, T.H. 
Dou, H.F. 
Chin, S.J.
Zhao, S. 
Keywords: Disturbance observer
Precision motion control
PWM amplifier
Issue Date: May-2003
Citation: Tan, K.K., Lee, T.H., Dou, H.F., Chin, S.J., Zhao, S. (2003-05). Precision motion control with disturbance observer for pulsewidth-modulated-driven permanent-magnet linear motors. IEEE Transactions on Magnetics 39 (3 II) : 1813-1818. ScholarBank@NUS Repository.
Abstract: In this paper, we address the problem of precision motion control of permanent-magnet linear motors (PMLMs) under the influence of significant disturbances. We establish a mathematical model of a PMLM driven by a sinusoidal pulsewidth-modulated (PWM) amplifier, obtaining it from a describing function analysis of the essentially nonlinear characteristics. The overall model (PWM+PMLM) inevitably inherits uncertainties in the face of load changes, system parameter perturbation, noise, and inherent system nonlinearities, etc., all of which constitute disturbances to the control system that will adversely affect the precision and accuracy. We propose a robust control scheme employing a disturbance observer to address the sensitivity of the control performance to the disturbances. Real-time experimental results are provided to verify and confirm the practical effectiveness of the proposed approach.
Source Title: IEEE Transactions on Magnetics
ISSN: 00189464
DOI: 10.1109/TMAG.2003.810617
Appears in Collections:Staff Publications

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