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

  • François Thiébaut
  • Cyril Lacroix
  • Loïc Andolfatto
  • Claire LartigueEmail author


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.


Measurement Shape deviation Flexible part Optical measurement 


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Copyright information

© Springer-Verlag London 2016

Authors and Affiliations

  • François Thiébaut
    • 1
  • Cyril Lacroix
    • 1
  • Loïc Andolfatto
    • 2
  • Claire Lartigue
    • 1
    Email author
  1. 1.LURPA, ENS de CachanUniversité Paris-Sud, Université Paris SaclayCachanFrance
  2. 2.EPFL, École polytechnique fédérale de Lausanne, Laboratory for Hydraulic MachinesLausanneSwitzerland

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