H∞ Control and Sliding Mode Control of Magnetic Levitation System

In this paper, H ∞ disturbance attenuation control and sliding mode disturbance estimation and compensation control of a magnetic levitation system are studied. A magnetic levitation apparatus is established, and its model is measured. Then the system model is feedback linearized. A H ∞ controller is then designed. For comparison, a sliding mode controller and a PID controller also were designed. Some experiments were performed to compare the performance of the H ∞ controller, the sliding mode controller and the PID controller.

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