Correction technology of the position angles of linear motors based on MRAC method
Zude Zhou · Control theory & applications · 2007
The effect of position angle errors of linear motors to output currents is analyzed in this paper.In order to alleviate the position angle errors,a position angle correction system is designed based on model reference adaptive control method.In the correction system,position angle errors are corrected by a position angle error compensator that does not use input parameters influenced by position angles.Therefore,the detected position angles by linear position encoders can be corrected precisely.This technology ensures that higher control precision could be achieved on the conditions of present linear motors and low-precision linear encoders.Simulation and experimental results show that currents of a linear motor can be controlled precisely and position angle errors can be compensated through using the position angle correction system.