Abstract
In this paper, a fuzzy controller is applied in the speed control of permanent magnet linear motors to promote their speed control performances. At the same time, the detailed design of the fuzzy controller is given. Fuzzy controllers can achieve high dynamic performance, but cannot achieve high static performance since fuzzy controllers have no integral part, especially when permanent magnet linear motors are influenced by strong force disturbances. The paper designs a disturbance observer to compensate the force disturbances based on the mathematical model of permanent magnet linear motors. So the influence of the force disturbance is eliminated, and the speed control effect of permanent magnet linear motors is increased. Simulation results show the fuzzy controller with the compensation of disturbance observer has a higher performance than the traditional PI. The experiment results also verify its higher dynamic and static performances in the speed control of permanent magnet linear motors.
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