“The Guide to the Expression of Uncertainty in Measurement” (GUM) method has many disadvantages when evaluating the uncertainty of wind speed measured by pitot tube, and the “Monte Carlo method” (MCM) is put forward to evaluate the uncertainty of wind speed. The measured quantity value of wind speed by the S-shaped pitot tube is the research object, and the uncertainty is evaluated by GUM and MCM, respectively, and the simulation test is carried out. GUM has errors due to its adoption of approximate linear model. MCM adopts real simulation strategy and has higher credibility than the GUM method, so the GUM method can be validated by the MCM method. When the partial input quantity is changed into triangular distribution, uniform distribution and arcsine distribution, the GUM method is found to be inapplicable. In the evaluation of MCM method, the complex calculation of sensitivity coefficient is avoided, and some uncertainty with small influencing quantity is not needed to be discarded. The evaluation result is more complete. Through comparing the uncertainty evaluation results of MCM before and after the water vapor correction term is discarded, the influence of the water vapor correction term is quantified. Therefore, compared with the GUM method, the MCM method has more advantages when wind speed is measured by pitot tube.

中文翻译：

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MCM和GUM方法评估皮托管风速测量不确定度的比较。

在评估皮托管测量的风速不确定度时，“测量不确定度表示指南”（GUM）方法存在许多缺点，提出了“蒙特卡洛法”（MCM）来评估风速不确定度。以S形皮托管测量风速的量值为研究对象，分别通过GUM和MCM对不确定性进行评估，并进行了仿真测试。GUM由于采用近似线性模型而存在错误。MCM采用真实的仿真策略，并且比GUM方法具有更高的可信度，因此可以通过MCM方法验证GUM方法。当部分输入量变为三角分布，均匀分布和反正弦分布时，发现GUM方法不适用。在评估MCM方法时，避免了灵敏度系数的复杂计算，并且不需要丢弃一些影响量小的不确定性。评估结果更加完整。通过比较丢弃水蒸气校正项前后的MCM不确定性评估结果，可以量化水蒸气校正项的影响。因此，与皮姆法相比，当用皮托管测量风速时，MCM方法具有更多的优势。