Aimed at the characteristic of bigger single point location error, a new measuring method using two points relative location measurement to reduce location measurement error was put forward.

针对单点定位误差比较大的特点，提出了用两点相对定位的测量方法来减小定位误差。

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Basing on current single point positioning precision, certain coordinate error is added into fixed points to study the result.

根据目前单点定位精度给起始点加上适当的坐标偏差，研究起始点坐标偏差对基线处理结果的影响。

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Combining its real geometrical structure, a polishing robot's error model is established and a single point method is used to identify the geometrical parameter errors.

本文首先结合某打磨机器人的实际几何结构，建立了该机器人的误差模型，利用单点法来辨识几何参数误差值；

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