Improvement of control performances using hysteresis elements applied to motor drive system

It has been an important subject in automatic control to obtain quick response without overshoot for a step response and good robustness against parameter variation of the control system. In this paper, the authors suggest a method to improve these control characteristics by use of a hysteresis element, and then propose a model tracking system which is composed of a nominal model including a hysteresis element and a tracking system with a robust compensator. This proposal gives excellent performance even under parameter variation