摘要

A linear model of the magnetic-levitation (maglev) system, including magnetic flux signal, has been established based on feedback linearization. This paper emphasizes measurements of magnetic flux signal and velocity signal, which are realized easily by electromagnetic induction law. The magnetic flux signal's range obtained by this method is wide. The degree of sensitivity can be regulated by changing the vertical area of the induction coils. Furthermore, this paper has designed a PIDB (proportion, integration, differentiation, flux density B) controller based on flux feedback, and some experiments have been performed on a CMS04 magnetic suspension vehicle in the national mid-low speed maglev experiment field of Tangshan city, China. The experimental results denote that the PIDB control method designed in this paper has more advantages than the traditional control method with position and current double cascades, and the robustness and stability of the maglev control system by this method have been verified effectively.