一种与坐标系无关的误差曲线拟合法

A fitting method of error curve being independent of coordinate

提出一种基于局部坐标系下三次样条函数的误差曲线拟合法,该法不仅使所拟合的误差曲线具有连续的一、二阶导数,而且保证所拟合的误差曲线不随坐标系的改变而改变。使用该法能获得具有较好的光顺性和一致性的误差拟合曲线。

Presents a fitting method of error curve. The method is based on cubic spline, function under local coordinate. It makes fitted error curve not only having continuous first and second derivative but also being constance in case of varying coordinate. We could obtain smooth and sole error fitting curve by means of this method.