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STUDY OF END-EFFECTS ANALYSIS AND NN COMPENSATION TECHNIQUE OF LINEAR MOTOR FOR HIGH PRECISION NC MACHINE

XIA Jia-kuan, WANG Cheng-yuan, LI Hao-dong, HUANG Wei (Electric Engineering Institute, Shenyang University of Technology, Shenyang 110023, China)  
In order to satisfying the running request of high precision and rapid response for the permanent magnet linear synchronous motors(PMLSM) servo system used in the high precision numerically controlled(NC) machine, a neural network(NN) is introduced on the base of analyzing the characteristics of end effects of the PMLSM which influence the performance of the linear servo system. Thus, the system has self-learning capability which can real-time compensate the nonlinear time-vary disturbance caused by the end-effects. A robust IP position composition controller is designed based on a forward-feed compensation control strategy using dual NN. Simulation results verify that the proposed control strategy solve the thrust ripple problem of PMLSM caused by end effects, and make the linear servo system have strong robust-ness, and the system steady charac-teristic is improved greatly.
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