Journal
AUTOMATICA
Volume 73, Issue -, Pages 223-230Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.automatica.2016.07.019
Keywords
Repetitive learning control; Space-learning; Step motor; Permanent magnet synchronous motor; Torque ripples; Cogging torque
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Repetitive space-learning controls are designed for current-fed uncertain permanent magnet step motors with non-sinusoidal flux distribution (the family of permanent magnet synchronous motors with cogging torque is allowed as a special case). Either semi-global rotor speed tracking is asymptotically achieved or local rotor position tracking is asymptotically guaranteed without requiring the time-periodicity of the corresponding reference signals. Simulation results illustrate the effectiveness of the presented approach in a typical electric drive control scenario, even in the presence of stator current dynamics which have been neglected at the design stage. (C) 2016 Elsevier Ltd. All rights reserved.
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