Research on Crossbeam Magnetic Levitation Control System of Gantry Moving Numerical Control Machine Tool

This paper adopts magnetic levitation technology for the moving crossbeam of the gantry NC machine tool in order to achieve non-friction control. Firstly, the mathematical model of the maglev system is established. By using the feedback linearization method, the nonlinear model can be transferred into linear model. Then, a maglev controller is designed based on the PI state feedback method. Feedback linearization is a global linearization approach, which is superior to the traditional local approximate linearization. The results of simulation show that the maglev controller can ensure the global stability and make the system have the better robustness.