平面度误差最小区域评定结果不确定度估计

Uncertainty Estimate of the Minimum Zone Evaluation Result of Departure from Flatness

在平面度误差的实际测量中,给出测量结果时往往不给测量结果的不确定度。按照国际标准化组织发布的《测量不确定度表示指南》(简称GUM)的要求,根据平面度误差最小区域评定的几何判别准则,推导了有关的不确定度传递公式。分别用蒙特卡罗方法及本文推导的公式对实际的测量结果进行了不确定度估计,实验结果表明,推导出的公式计算的不确定度要比用蒙特卡罗方法估计的效果要好。

In actual measurement for departure from flatness, the uncertainty of measurement result is usually not given. Accord- ing to the methods that ISO Guide to the Expression of uncertainty in Measurement （GUM） [ 1 ] proposed, and the judgment criterion of minimum zone evaluation of departure from flatness, the estimate of uncertainty propagation formula is deduced. The estimation formula is tested with Monte Carlo Method on actual measurements. Experiment result shows that the uncertainty calculated with the formula deduced by this paper is better than the result estimated with Monte Carlo method.