基于误差椭圆理论与蒙特卡罗方法的圆直径测量不确定度评定

发布时间：2018-02-26 11:14

  本文关键词： 三坐标测量机 误差椭圆 直径 不确定度 蒙特卡罗方法　出处：《上海交通大学学报》2017年04期 　论文类型：期刊论文

【摘要】：利用三坐标测量机(CMM)测量圆几何特征的功能,建立了基于误差椭圆理论与蒙特卡罗方法的测量不确定度评定模型.以误差椭圆表征采样点的不确定度,结合蒙特卡罗方法仿真所得较少的测量样本数据快速得到了最小二乘拟合条件下的圆直径测量的不确定度.同时,与实验测量和文献公式计算的结果进行对比,验证了其有效性.结果表明,所建立的模型能够准确评定圆直径测量的不确定度.
[Abstract]:Using the function of CMM (CMM) to measure the geometric characteristics of a circle, an evaluation model of measurement uncertainty based on error ellipse theory and Monte Carlo method is established. The uncertainty of sampling points is represented by error ellipse. The uncertainty of circle diameter measurement under the condition of least square fitting is quickly obtained by using the less sample data obtained by Monte Carlo simulation. At the same time, it is compared with the results of experimental measurement and literature formula calculation. The results show that the model can accurately evaluate the uncertainty of circle diameter measurement.
【作者单位】： 上海交通大学机械与动力工程学院;
【基金】：国家数控机床科技重大专项(2015ZX04005001)资助
【分类号】：TH721;TG81
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本文编号：1537778