Computing straightness error on the basis ofleastsquaremethod by way of smallest field method is new method in exploring the minimum condition.
用最小区域法求直线度误差，是在最小二乘法的基础上探讨的一种符合最小条件的新方法。
2
Based on the mathematical model of circularity error, the leastsquaremethod, minimum envelope zone method and harmonic analysis method for evaluating the circularity error are treated.
本文根据圆度误差的数学模型，论述了评定圆度误差的最小二乘法、最小区域法和谐波分析法。
3
The mathematical models of coaxality error by evaluation of the orthogonal leastsquaremethod and the minimum condition method are presented in this paper.