For the speed loop of a permanent magnet synchronous motor(PMSM)
fractional calculus and the sliding-mode variable structure control theory were employed to design the hybrid controller which integrates a fractional order PI
λ
D
μ
controller with a sliding-mode variable structure controller. The fractional order PI
λ
D
μ
and sliding-mode variable structure control are effectively combined by using the variable weighted factor α. The hybrid controller not only overcomes the high-frequency quiver near the origin of the sliding plane but also broadens the scope of adjustment of conventional PID controllers
leading to higher robustness
anti-jamming capability
good rapidity and stability of PMSM. The results of this study may be beneficial to the improvement of complex cross-control methods in motor control systems.
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references
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