用于随动控制的直接函数插补算法

A Direct Function Interpolation Algorithm for Follow up Control

提出一种用于随动控制的直接函数脉冲增量插补算法，适用于以参数方程表示的曲线的插补计算。由于考虑了随动控制的特点，并采用了插补误差的控制技术，该算法具有计算公式简单、函数计算次数少和插补误差可控的优点。应用实例表明，该算法可用于ＣＮＣ系统的实时插补。

A new general parametric curve interpolation algorithm for multi axis follow up control of CNC system is proposed.It is a direct function incremental step algorithm.Taking account of the characteristics of follow up control and using the technique of interpolation error control,the algorithm has simple formula, less number of complicated parametric function evaluations and controllable contour error.The implementation of the proposed algorithm in IBM PC 486DX2/66 for a practical example shows that the algorithm can be used for the actual real time interpolation of CNC system.