Abstract

The purpose of this research is to find a simple and accurate NURBS interpolator for CNC systems such as robot, CMM and CNC machine tools. This paper presents a new design of NURBS interpolator for CNC system. The proposed algorithm used the recursive characteristics of NURBS equation, the previous incremental value and chord length for the sake of a constant chord length. Simulation study was conducted to see the performance of the proposed interpolator with reference-word and reference-pulse method. Consequently, an accurate and simple NURBS interpolator was possible for modern CNC systems.

• Keywords: NURBS Interpolator(NURBS 보간기),Parameter update(변수갱신),Recursive(재귀),Reference-pulse interpolator(기준펄스 보간기),Reference-word interpolator(기준펄스 보간기),Constant chord length(일정 선분 길이)