关节式坐标测量机的关节零位偏差是由装配工艺误差引起的，对测头末端的空间位姿误差影响极大。
The joint zero position deviations of joint type CMM, which result from assembly technology errors, have an enormous influence on the pose errors of probe end.
在系统中提出以虚拟手指空间位姿代替实际力作用线方向上位移的计算和基于实际材料的虚拟力外推的方法。
Using virtual finger's position steading of real distance and extrapolation based on real material are also suggested in the system.
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