Aimed at enhancing the control precision and speed tracking rapidity of a permanent magnet linear synchronous motor (PMLSM), a novel control scheme combining the inverse system method and the internal model control is proposed in this paper. A decoupling pseudo-linear system can be obtained by cascading the inverse model of the PMLSM with the original system. In addition, in order to improve the robustness of the whole system and to reject the influence of the unmodeled dynamics and various disturbances to the linearizing control accuracy, the internal model controller is used as the extra closed-loop controller for the pseudo-linear system. Therefore, the presented control scheme incorporates the advantages of both the inverse system method and the internal model control. The effectiveness of the proposed control scheme is verified by simulation and experimental results at various operations. Simulation studies are performed to prove the effectiveness of the proposed control scheme.
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