圆柱表面重构基准的曲线拟合提纯法

提出了一种新的重构基准提取方法一曲线拟合法，即采用分离出的回转误差运动中一阶谐波分量代替偏心误差运动。试验表明，该方法是可行的，有效地解决了圆柱度测量中重构基准难以确定的问题。

Used Curve Fitting to Purify the Reconstruction Datum of Cylindrical form Error

The location of the section least square circle centre was the basis of cylindrical form error reconstruction. At present, there is no suitable method to pick up the eccentric error motion of the center from the separated revolved error motion effectually. The separated rotation error motion was made up of the eccentric error motion of the least square circle center and a pure rotation error motion with a complex harmonic. According to the above reason, a new purifying method of reconstruction datum, the curve fitting method, was carried out in this paper. The new method was that the eccentric error motion was replaced by the first harmonic portion which had been separated from the rotation motion. The test result indicates that the method is feasible and can solve the problem how to define the reconstruction datum in the cylindricality measure.