Control of Magnetic Bearing having Feedforward Compensator

Abstract

In the past, the controller of magnetic bearing was desined only by noticing the stability and robust property. However if the response of displacement by reference signal is implemented, some new industrial applications can be expected. Therefore, in this paper we propose a control method of magnetic bearing, and we especially take account of an improvement of displcement response by using the usual stable controller and the feedforward compensator based on the design method of 2-degree-of-freedom. First, a model of the controlled object is clarified, and the conventional control scheme of magnetic bearing is shown. Second, a practical controller of the magnetic bearing is given with consideration for the effect of the parameter uncertainty and the neglected vibration mode, and some industrial application are proposed. Last, the effective experimental results are shown.