Research on the Sliding Mode Control in Cam Grinding

Abstract

It is difficult to obtain the cam profile accurately in cam grinding because of the complicated contour, the grinding force fluctuate, the tracking performance of the servo system and other interferential factors. The tracking performance of the servo system has a great influence on the cam profile error and leads to the reduction of the cam profile precision. In order to reduce the profile error of cam and improve the machining accuracy, the tracking performance of each servo axis is improved by using sliding mode variable structure control method. The sliding mode variable structure controller adopting the method of proportional switching, quasi-sliding mode and dynamic switching function are designed respectively. The simulation analysis are carried out, and the results of simulation show that the tracking error can be reduced effectively using the sliding mode variable structure control in cam.