Abstract

By combining control theory and fuzzy set theory, a new kind of state controller is proposed. The ideas of time optimal set point control and membership function are used in the design of the state controller which we call fuzzy state controller (FSC). The FSC has been applied for the postion control of a hydraulic servo. The control effects of ordinary state controller and FSC are compared for different strokes. The experimental results confirm that FSC is much more robust than the state controller when the piston stroke is changed.

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