Abstract
Since the magnetic levitation system is nonlinear, linearization of the system is required to use linear control method in nonlinear system, and the stability and control performance cannot be guaranteed. To solve this problem, a nonlinear control system should be designed. In this paper, backstepping control (BSC) is proposed for position control in maglev systems. For the design of BSC, three Lyapunov functions are defined, and a virtual reference is obtained based on the Lyapunov stability theorem. Based on the virtual velocity and current references, the control input is designed to guarantee the stability of the control system. The proposed control system is implemented using MATLAB/Simulink, and tracking and disturbance performance analyses are performed. As a result, using state feedback control the performance of the proposed control system is verified through comparison with conventional control system.
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