Reconstruction of 3D surfaces from incomplete digitisations using statistical shape models for manufacturing processes

José M. Navarro-Jiménez (), José V. Aguado (), Grégoire Bazin (), Vicente Albero () and Domenico Borzacchiello ()
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José M. Navarro-Jiménez: Institut de Calcul Intensif at Ecole Centrale de Nantes
José V. Aguado: Institut de Calcul Intensif at Ecole Centrale de Nantes
Grégoire Bazin: Stelia Aerospace
Vicente Albero: Universitat Jaume I
Domenico Borzacchiello: Institut de Calcul Intensif at Ecole Centrale de Nantes

Journal of Intelligent Manufacturing, 2023, vol. 34, issue 5, No 16, 2345-2358

Abstract: Abstract Digitization of large parts with tight geometric tolerances is a time-consuming process that requires a detailed scan of the outer surface and the acquisition and processing of massive data. In this work, we propose a methodology for fast digitization using a partial scan in which large regions remain unmeasured. Our approach capitalizes on a database of fully scanned parts from which we extract a low-dimensional description of the shape variability using Statistical Shape Analysis. This low-dimensional description allows an accurate representation of any sample in the database with few independent parameters. Therefore, we propose a reconstruction algorithm that takes as input an incomplete measurement (faster than a complete digitization), identifies the statistical shape parameters and outputs a full scan reconstruction. We showcase an application to the digitization of large aeronautical fuselage panels. A statistical shape model is constructed from a database of 793 shapes that were completely digitized, with a point cloud of about 16 million points for each shape. Tests carried out at the manufacturing facility showed an overall reduction in the digitization time by 80% (using a partial digitization of 3 million points per shape) while keeping a high accuracy (reconstruction precision of 0.1 mm) on the reconstructed surface.

Keywords: Statistical shape analysis; Shape reconstruction; Surface digitization; Sparse sampling (search for similar items in EconPapers)
Date: 2023
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DOI: 10.1007/s10845-022-01918-z

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