Feedrate profile planning based on sensitive points identification in NURBS interpolation

摘要：

The Non-uniform rational B-spline (NURBS) is widely used in CAD/CAM/CNC. The NURBS interpolation is crucial for an advanced CNC system compatible with NURBS. Classic NURBS interpolation algorithms always do not well consider both the contour precision and feedrate smoothness. This paper proposes a NURBS interpolation algorithm based on the feedrate sensitive points identification. The feedrate sensitive points is found out according to the chord error which is relative to the feedrate passing this point. Furthermore, the feedrate profile is adaptively planned between two adjacent sensitive points according to the distance between them. The feedrate profile of the whole NURBS can be connected with these feedrate sections. A cubic NURBS curve is adopted to evaluate the interpolation algorithm with 3 different feedrate commands. Simulation results show that the proposed interpolation algorithm is available and can be implemented flexibly according to the different situations of sensitive points.

关键词： NURBS sensitive chord error acceleration jerk

作者: Lin Feng Shen Xiaoan

作者单位: Quzhou College, Quzhou 324000, China

会议类型: 国际会议

会议名称: 2010 International Conference on Digital Manufacturing and Automation(2010 数字制造与自动化国际会议 ICDMA 2010)

会议地点: 长沙

会议语种:英文

页码: 728-732

在线出版日期: 2010-12-18（万方平台首次上网日期，不代表论文的发表时间）