Journal of Institute of Control, Robotics and Systems (제어로봇시스템학회논문지)

Institute of Control, Robotics and Systems (제어로봇시스템학회)
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A new method of contour error modeling for cross-coupled control of CNC machines

CNC 공작 기계의 상호 결합 제어를 위한 새로운 윤곽 오차 모델링 방법

  • Joo, Jeong-Hong ( Dept.of Electronics Electrical Engineering, Kyungpook National University) ;
  • Lee, Hyun-Chul ( Dept.of Electronics Electrical Engineering, Kyungpook National University) ;
  • Lee, Yun-Jung ( Dept.of Electronics Electrical Engineering, Kyungpook National University) ;
  • Jeon, Gi-Joon ( Dept.of Electronics Electrica)
  • 주정홍 (경북대학교 전자.전기공학부) ;
  • 이현철 (경북대학교 전자.전기공학부, 제어계측신기술연구센터) ;
  • 이연정 (경북대학교 전자.전기공학부) ;
  • 전기준 (경북대학교 전자.전기공학부, 제어계측신기술연구센터)
  • Published : 1997.08.01
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Abstract

In this paper, we propose a new method of contour error modeling for cross-coupled control of CNC machines. This modeling method is based on the information that the interpolator of a CNC machine generates knot points per each sampling time in order to approximate a given curved path as a series of small straight-line segments. The merits of the proposed method are : (1) its applicability for arbitrary curved contours and (2) its ability to calculate contour errors more accurately than the other conventional methods. The proposed method is evaluated and compared with the conventional methods using the three typical curved trajectories by computer simulations. Furthermore, it is shown that the cross-coupled controller based on this proposed error model improves contouring accuracy more effectively than the other methods.

Keywords

References

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