Abstract
Aiming at wide variations in loads and moments of inertia, large disturbed moment of machine tool servo system, a parallel control structure is proposed, and sliding mode structure controller and PI Ziegler-Nichols controller of the position loop are designed. The sliding mode controller can restrain effects of parameter uncertainties and external disturbances and the PI Ziegler-Nichols can realize the parameter adjustments of the integral and proportion of the classical PI controller. Simulation results show that the designed parallel controller can guarantee high performance of tracking behavior and robustness.
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