| Special part-issue for selected papers of the 13th CIRP CAT 2014 |
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| An iterative statistical tolerance analysis procedure to deal with linearized behavior models |
| Antoine Dumas, Jean-Yves Dantan, Nicolas Gayton, Thomas Bles, Robin Loebl |
| Laboratoire Conception Fabrication Commande, Arts et Métiers ParisTech Metz, METZ CEDEX 3 57078, France; Institut Pascal, Clermont Université, IFMA, UMR 6602, BP 10448, Clermont-Ferrand 63000, France |
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Abstract Tolerance analysis consists of analyzing the impact of variations on the mechanism behavior due to the manufacturing process. The goal is to predict its quality level at the design stage. The technique involves computing probabilities of failure of the mechanism in a mass production process. The various analysis methods have to consider the component’s variations as random variables and the worst configuration of gaps for over-constrained systems. This consideration varies in function by the type of mechanism behavior and is realized by an optimization scheme combined with a Monte Carlo simulation. To simplify the optimization step, it is necessary to linearize the mechanism behavior into several parts. This study aims at analyzing the impact of the linearization strategy on the probability of failure estimation; a highly over-constrained mechanism with two pins and five cotters is used as an illustration for this study. The purpose is to strike a balance among model error caused by the linearization, computing time, and result accuracy. In addition, an iterative procedure is proposed for the assembly requirement to provide accurate results without using the entire Monte Carlo simulation.
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Received: 25 July 2014
Published: 04 May 2015
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