Abstract
In this paper, the modelling of one-degree-of-freedom magnetically levitated system considering the PI control characteristics of power amplifier and delay characteristic of magnetic flux density is performed, and nonlinear resonance phenomena and bifurcation phenomena are studied. From theoretical results, it is clarified that the shape of resonance curve becomes soft type, and also the influences of dynamical parameters on the nonlinear vibration phenomena are clarified. Furthermore, a experiment is performed, and obtained theoretical results are validated.
