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Evaluation of the shape deviation of non rigid parts from optical measurements

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Abstract

This paper deals with an approach to identify geometrical deviations of flexible parts from optical measurements. Each step of the approach defines a specific issue which we try to respond to. The problem of measurement uncertainties is solved using an original filtering method, which permits to only consider a few number of points. These points are registered on a mesh of the CAD model of the constrained geometry. The shape resulting from deflection can be identified through the finite-element simulation of the part’s deformation due to its own weight and the measuring set-up. Finally, geometrical deviations are obtained by subtracting geometrical deflections to measured geometrical deviations. The method is illustrated in an experimental test case.

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Authors and Affiliations

  1. LURPA, ENS de Cachan, Université Paris-Sud, Université Paris Saclay, F-94235, Cachan, France

    François Thiébaut, Cyril Lacroix & Claire Lartigue

  2. EPFL, École polytechnique fédérale de Lausanne, Laboratory for Hydraulic Machines, avenue de Cour 33 bis, 1007, Lausanne, Switzerland

    Loïc Andolfatto

Authors
  1. François Thiébaut
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  2. Cyril Lacroix
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  3. Loïc Andolfatto
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  4. Claire Lartigue
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Correspondence to Claire Lartigue.

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Thiébaut, F., Lacroix, C., Andolfatto, L. et al. Evaluation of the shape deviation of non rigid parts from optical measurements. Int J Adv Manuf Technol 88, 1937–1944 (2017). https://doi.org/10.1007/s00170-016-8899-3

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  • DOI: https://doi.org/10.1007/s00170-016-8899-3

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