Method to Evaluate Measuring Uncertainty of Probe Radius Compensation with Account for Variation in Measuring Surfaces

2017 International Conference on Aerospace Technology, Communications and Energy Systems

航空航天工程;无线电电子学;能源学

Ruzanov, Nikolay V.^1 ; Pechenin, Vadim A.^1 ; Bolotov, Michael A.^1

Samara National Research University, Institute of Engine and Power Plant Engineering, Moskovskoye shosse, Samara region 34, Samara

443086, Russia^1

关键词: Confidence levels;    Contact measurements;    Interval estimate;    Machining methods;    Mathematical expectation;    Measuring uncertainty;    Probabilistic estimates;    Probe radius compensation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/302/1/012063/pdf
DOI  :  10.1088/1757-899X/302/1/012063

学科分类：航空航天科学

来源: IOP

【 摘 要 】

This article describes a methodology of evaluating the uncertainty of the contact measurement of freeform surfaces with coordinate measuring machines, taking into account the variation in the form of measured surfaces. This variation is due to machining uncertainties, which appear during production using a particular machining method and technology. Probabilistic estimates of errors of determination of contact points for freeform surfaces were obtained. Use of this model makes it possible to obtain interval estimates of errors with the required confidence level of probability and mathematical expectation. The relations of the probabilistic error estimates at any of the measured points on surface are obtained.