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Détermination des incertitudes de mesures sur machines à mesurer tridimensionnelles : application aux engrenages

Abstract : Because measurands are perfectly defined in standards, Coordinate Measuring Machines (CMM) accreditation is possible for gears provided measurements uncertainties are assessed. In accordance with the Guide to the expression of Uncertainty in Measurement (GUM), our work is mainly based on the Monte Carlo method and linear or circular error separation techniques to differentiate defaults and quantify associated measurements uncertainties. Analysis of the CMM geometry effect on a circular ring or gear measurement shows that it is impossible to characterize completely the CMM geometry with a part supposed to be perfect. However, we set up a concept of “Equivalent defaults” characterizing the CMM geometry for the theoretical definition of the studied part. The probing systems used were assessed in order to compensate the identifiable systematic defaults and quantify associated uncertainties. Based on the example of a cylindrical gear, three different approaches are compared: the analysis of the CMM metrological characteristics, by error separation method and by comparison. This contribution in term of uncertainties measurements has numerous applications; for example the study of penetration rates and wear volumes of explanted total hip prostheses.
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Submitted on : Thursday, January 17, 2008 - 8:00:00 AM
Last modification on : Wednesday, November 29, 2017 - 9:42:43 AM
Long-term archiving on: : Wednesday, September 8, 2010 - 5:46:15 PM


  • HAL Id : pastel-00003226, version 1



François Hennebelle. Détermination des incertitudes de mesures sur machines à mesurer tridimensionnelles : application aux engrenages. Sciences de l'ingénieur [physics]. Arts et Métiers ParisTech, 2007. Français. ⟨NNT : 2007ENAM0035⟩. ⟨pastel-00003226⟩



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