Fuzzy sliding mode controller for servo tracking control in precision machine tools

Detail research was given to servo tracking controller design that utilized the sliding mode control theory in order to achieve robust tracking performance in precision machine tools subject to parameter variations and external disturbance. A type of fuzzy sliding mode controller was presented by incorporating the fuzzy logic with the sliding mode control to alleviate the chattering of the sliding mode controller. Experimental results showed that this fuzzy sliding mode controller had more robustness and better tracking performance than the sliding mode controller and PID.