Preview Feedforward Compensation of Linear Permanent Magnet Synchronous Motor Servo System Implemented with Adaline

After presenting briefly IP position control for a high-precision micro-feed linear permanent magnet synchronous motor(LPMSM) servo system in this paper, we present a method of optimal preview feedforward compensation for this system to improve the tracking performance. To adapt the parameter variability of this system, we adopt Adaline to implement preview feedforward compensation. The input vector of Adaline is the preview steps, and its weight value is the preview feedforward coefficient. It is obvious that the weights have explicit physical meaning, and that the initial values of the weights are not random, but are the preview feedforward coefficients worked out under the rated conditions, so the convergence speed of Adaline is very fast. To demonstrate the significance of the proposed method, simulations of this application are carried out.