A fuzzy modeling of active magnetic bearing system and sliding mode control with robust hyperplane using μ-synthesis theory

Abstract

The aim of this paper is to realize a sliding mode control system using robust hyperplane based on fuzzy model for the active magnetic bearing system with gyroscopic rotation. A fuzzy model of the active magnetic bearing system is built from the input and output data of the actual turbo-molecular pump by using the fuzzy neural network. The sliding mode controller has a switching hyperplane using μ-synthesis theory which has a powerful robustness and can suppress spillover phenomena. The ultra high-speed operation test of the actual turbo-molecular pump which reached the rated operation 45 000 rpm has been done by using the proposed controller. The good experimental results have been obtained. Therefore, it has been clarified that the proposed scheme is very useful strategy for the active magnetic bearing system.