Suppressing mechanical vibrations in a pmlsm using feedforward compensation and state estimates

Abstract

This chapter postulates the load control method for suppressing mechanical vibrations in a Permanent Magnet Linear Synchronous Motor (PMLSM) application. The control method is based on the load acceleration feedback, which is estimated from the velocity signal of a linear motor using the Kalman filter. The linear motor itself is controlled by a conventional PI -velocity controller, and the vibration of the mass is suppressed from an outer control loop using feed forward acceleration compensation. The proposed method is robust in all conditions, and is suitable for contact less applications, example laser cutters. The algorithm is first designed in the simulation program, and then implemented in the physical linear motor using a digital signal processor (DSP) application. The results of the responses are presented.