中文摘要：

接触式测头记录的是球心坐标，而在工件定位过程中实际使用的数据是测头和工件接触点的坐标。针对这个问题，提出了测头半径误差补偿的迭代方法。从测量点集和CAD模型这两个角度来看，分别存在一个偏移曲面，将这个偏移量嵌入到工件定位算法中，构建了一个半径误差补偿的迭代过程。实验结果表明，和传统的补偿方法的计算结果相比，该补偿方法显著提高了定位精度，并且对算法的计算效率影响不大。

英文摘要：

Contact probe records the center of its ball end. The data used in workpiece localization are the coordinate of points where the probe contacts with the workpiece. Focusing on the instance,an iterative method of contact probe error compensation was presented. Viewed from the measurement point set and CAD model individually,there was an offset surface. The iterative compensation method was formed if the offset was embedded in the localization algorithms. The experimental results indicate that the iterative compensation methods improve the localization precision enormously, compared with results using the traditional methods. And its computation efficiency is not affected drastically.