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This paper deals with the application of terminal sliding mode control theory of 4 degree of freedom rigid Active Magnetic Bearing System (AMB). The virtual control inputs are introduced, and the controller is designed by Lyapunov stability. The actual control input currents are observed by the relationship between the virtual and the actual input current, to achieve a rapid and stable magnetic levitation rotor. The simulation results show that the proposed scheme can suppress the disturbance effectively, and the system is fast and stable at the equilibrium position because the initial state of the system is on the sliding surface.

The Terminal Sliding Mode Control of 4-DoF Active Magnetic Bearing Rotor System