列表曲线逼近函数构造方法的探讨

Study of Structural Methods of Approximating Function of Tabulate Curves

列表曲线上离散点的数值一般是通过测量或实验得到的。为便于数控编程,必须首先构造出一次逼近函数。逼近函数的构造方法较多,各有其优缺点。采用何种逼近函数要考虑离散点的测量精度及轮廓允许误差要求。

Discrete point coordinate value of tabulate curves is commonly got through measurement or experiment. It is prerequisite to construct an approximating function for NC programming. There are many structural methods on approximating function which have advantages and disadvantages. To choose which approximating function is dependent on the accuracy of measurement and the part figure＇s tolerable error.