VSS를 이용한 AC 서보모터의 원호보간 오차 개선에 관한 연구
(A) Study on the improvement in circular interpolation error of AC Servo Motor by VSS
VSS AC 서보모터 원호보간 슬라이딩 모드;
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The objective of this study is aimed at reducing the contour error of AC Servo derives by improving the interpolation error of each axis through variable structure control system. The errors in machining process by AC Servo motor are due to many elements, such as the delay of the servo drivers, friction and the gain mismatch between x axis and y axis motors and so on. Variable structure control system is applied to a AC servo drive as a numerical example in this paper. The experiment results which are compared with those of typical PI scheme show the validity of improvement in circular interpolation error of the system.