关键词: NURBS曲线;插补算法;滤波技术;数控系统

Abstract:

An interpolation algorithm was developed for non-uniform rational B-spline curves (NURBS) interpolation while considering machining accuracy,the
acceleration/deceleration capability of machine tool and the acceleration varying continuity.This algorithm can adaptively adjust the machining velocity according to change of curvature,while filtering technology were applied to keep acceleration continuity during the whole interpolation process,so it reduces mechanical shock and improves machining precision and machining efficiency.Finally the designed experiments show that the proposed
interpolation algorithm can achieve high-speed,high-precision and efficient machining of NURBS curve.

Key words: NURBS curve;interpolation algorithm;filtering technique, CNC system