WSEAS Transactions on Applied and Theoretical Mechanics
Print ISSN: 1991-8747, E-ISSN: 2224-3429
Volume 7, 2012
Distinguishing Profile Deviations from a Part’s Deformation Using the Maximum Normed Residual Test
Authors: , ,
Abstract: Non-rigid parts, in free-state, may have a considerable different shape than their nominal model due to dimensional and geometric variations of manufacturing process, gravity loads and residual stress induced distortion. Therefore, sorting profile deviation from a part’s deformation by comparing the part’s nominal shape to its scanned free-state shape is a challenging task. This task is a key step in the Iterative Displacement Inspection (IDI) algorithm used for the inspection of non-rigid parts without the use of costly specialized fixtures. This paper proposes the use of the statistical maximum normed residual test to improve the aforementioned identification task. Thirty two simulated manufactured parts are studied to show that the proposed method reduces the type I and II identification error of the IDI method.
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Keywords: Rigid registration, non-rigid registration, quality control, tolerancing, inspection, metrology, non-rigid parts, deformation, Geometric dimensioning and tolerancing (GD&T)