Precision motion control with a high gain disturbance compensator for linear motors.
In this paper, we address the problem relating to the precision control of permanent magnet linear motors to track repeated motion trajectories. A high gain disturbance compensator is developed to improve the control performance degraded due to the presence of significant disturbances. An inverse gain of the overall system model is used to set up a disturbance observer. The observed disturbance is then used to generate a "knocker" signal, to be augmented to the control signal, which can provide the additional energy necessary to overcome the effects of the disturbances. A learning scheme is used to adjust the knocker signal iteratively over the repeated cycles. Simulation and experimental results are furnished to demonstrate the effectiveness of the proposed control scheme.
Department of Electrical Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117576. eletankk@nus.edu.sg
Kok Kiong
KK
Tan
Shao
S
Zhao