Abstract
Recently, more and more AMB (active magnetic bearing) have been applied in automobile, airplane and submarine, where the base motion can not be ignored. Under these conditions, the dynamic model which considered the stiffness of the base as infinity is inaccuracy because of the large influence of the base motion. To investigate the dynamic characteristic of disk-shaped magnetic suspended rotor active magnetic bearing-rotor system which is subjected to lateral base motion. The mathematical model of the base, magnetic bearing and disk-shaped rotor is developed in this paper. Fuzzy PID controller was adopted in the disk-shaped magnetic suspended rotor system. The effects of base motion, electrical differential equations of control system and the mounting of sensors at different positions on the dynamic characteristics of the disk-shaped magnetic suspended rotor system were discussed. The result showed the effect on magnetic bearing under the influence of lateral base motion should be considered in control system.
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