Spillover control of magnetic levitation systems using H.INF. control theory.

This study is concerned with a spillover problem for magnetic levitation systems. At first, we show the typical spillover phenomena caused by the interaction between the control system and the structure system of the magnetic levitation system. Also, we show some good data of the controlled spillover by means of notch filters. Next, applying the H∞ control theory to a magnetic levitation system, we design the control system for that system without spillover and describe in detail how to design a H∞ controller. In this paper, we assume the magnetic levitation system as a one-axis control system for simplicity, which is the five-order system with the exception of the guideway. As a result, it has been clarified that the H∞ controller has the characteristics of two kinds of filters, a low-pass filter and a notch filter.