Abstract：The servo system of remanufactured CNC machine tool is a complicated electromechanical coupling system,and its dynamic characteristic is directly related to the performance of machine tool. The new adaptive Fuzzy-PID was presented to control the position loop. This control scheme uses the nonlinear control characteristics of fuzzy algorithm to improve the control flexibility and adaptive ability of a PID controller. Based on the feed servo system of a remanufactured CNC raceway grinder,the simulation of a Fuzzy-PID controller was carried out in the software Matlab / Simulink. The Simulation results show that this new control scheme heightens the disturbance rejection ability and improves the dynamic performance of the system obviously.

Keyword：remanufacture;servo drive;fuzzy control;dynamic characteristic;