Research on the Parameters Identification of Direct Thrust Control System Using Wavelet Transform

Abstract

To solve the effect of primary resistance change of the low-speed performance in direct thrust control system of linear motor, Wavelet analysis is used in primary resistance identification in this paper, because of the time frequency location characteristic and multi-scale ability of wavelet transform and multi-resolution analysis. Then wavelet transform research on direct thrust control system is proposed. The observation of flux linkage is improved by accurate identification of primary resistance, and the direct thrust control performance of linear motor is further improved. This paper compares the neural network with wavelet transform to identify the primary resistance, and obtains the results are shown that the wavelet transform is further suitable for primary identification. The simulation results of direct thrust control system show the identifier that is based on wavelet transform can precisely measure the value of resistance and efficiently improve the lowspeed performances of direct thrust control system.