CONCURRENT SPEED AND POSITION TRACKING OF PM BRUSHED DC MOTORS
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Copyright 2015 by ASME. Permanent magnet brushed DC motors are essential components in a wide range of applications in which their unique benefits are explored. However, being sensitive to system based uncertainties such as external loading variation and sudden speed change has made improving the precise control of their speed and position a challenging task. To mitigate such negative effects that invariably undermine motor stability and controllability, a novel wavelet-based nonlinear time-frequency control scheme viable for the concurrent speed and position tracking of permanent magnet brushed DC motor is developed. The control approach has its foundation established in the wavelet-domain adaptive theory which allows control to be exerted in both the time and frequency domains simultaneously. Simulation results demonstrate that the proposed controller is superior to the traditional PID control in mitigating the speed and position responses of a permanent magnet brushed DC motor under severe system uncertainties.
