A survey of control strategy for magnetic suspension ball system

The magnetic suspension ball system is a typical uncertain nonlinear systems, and is the foundation and platform for the study of other complex magnetic levitation system. Recently, new control strategies have been proposed constantly for it. Firstly, this paper analyzes the working principle and modeling methods of the magnetic suspension ball system. Then, this paper introduces several existing control methods of it, analyzes and summarizes the status and characteristics of the various methods. Finally, this paper makes a further analysis of the problems of existing control method, and Investigate the improved control scheme for it.