Quick GPS: A new CAT system for single-part tolerancing

Anselmetti, Bernard; Chavanne, Robin; Yang, Jing; Anwer, Nabil

doi:10.1016/j.cad.2010.04.006

Cited by 57 publications

(30 citation statements)

References 13 publications

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“… Some step in the approach is extremely complicated. Such situation can be seen in assembly positioning constraints based approach [28][29][30][31][32], variational geometric constraint network (VGCN) approach [33,34], and polychromatic sets based approach [35,4]. The assembly positioning constraints based approach, which was presented by Anselmetti and Mawussi [28], extended by Mejbri et al [29] and Cao et al [32], and implemented by Anselmetti [30,31], defines each functional requirement as a geometric tolerance on an ending geometric entity.…”

Section: Related Workmentioning

confidence: 99%

Towards an ontology-supported case-based reasoning approach for computer-aided tolerance specification

Qin

et al. 2018

Knowledge-Based Systems

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In this paper, an ontology-supported case-based reasoning approach for computer-aided tolerance specification is proposed. This approach firstly considers the past tolerance specification problems and their schemes as previous cases and the new tolerance specification problems as target cases and uses an ontology to represent previous and target cases. Then certain ontology-based similarity measure is used to assess the similarity between the toleranced features of target and previous cases, the similarity between the part features of target and previous cases, and the similarity between the topological relations of target and previous cases. Based on these similarities, an ontology-based similarity measure for computing the similarity between target and previous cases is designed, and an algorithm for establishing such similarity measure with high accuracy and retrieving similar previous cases for a target case with this similarity measure is presented. This algorithm shows how to linearly combine the similarity of toleranced features, the similarity of part features, and the similarity of topological relations to assess the similarity between target and previous cases to implement retrieval of previous cases under the prerequisite of ensuring the highest accuracy of the similarity measure. The paper also reports a prototype implementation of the proposed approach, provides an example to illustrate how the approach works, and evaluates the approach via theoretical and experimental comparisons.

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Section: Related Workmentioning

confidence: 99%

Towards an ontology-supported case-based reasoning approach for computer-aided tolerance specification

Qin

et al. 2018

Knowledge-Based Systems

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“…Functional tolerancing was performed with the Quick GPS software developed by B. Anselmetti [37] in the CATIA environment with Functional Tolerancing Annotation Workshop.…”

Section: Functional Tolerancingmentioning

confidence: 99%

Comparison of Analysis Line and Polytopes Methods to Determine the Result of a Tolerance Chain

Pierre

Anselmetti

2015

Journal of Computing and Information Science in Engineering

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Functional tolerancing must ensure the assembly and the functioning of a mechanism. This paper compares two methods of tolerance analysis of a mechanical system: the method of “analysis lines” and the method of “polytopes.” The first method needs a discretization of the ending functional surface according to various analysis lines placed on the outer-bound of the face and oriented along the normal of the surface. The second method uses polytopes. The polytopes are defined from the acceptable limits of the geometric deviations of parts and possible displacements between two parts. Minkowski sums and intersections polytopes are then carried out to take into account all geometric variations of a mechanism.

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“…But for the complex positioning surfaces, geometrical specifications cannot be automatically generated. Tolerance types of a single part can be obtained by means of both the positioning tables and the links between various contact surfaces (Anselmetti et al 2010). Due to the principle underlying quick geometrical product specification (GPS), this method cannot solve the problem of generation of assembly tolerance types.…”

Section: Introductionmentioning

confidence: 99%

A new method for automatic synthesis of tolerances for complex assemblies based on polychromatic sets

Zhang

et al. 2011

Enterprise Information Systems

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2011) A new method for automatic synthesis of tolerances for complex assemblies based on polychromatic sets, Enterprise Information Systems, 5:3, 337-358, In computer-aided tolerance design (CAT), integrated design of dimensional and geometric tolerances is still one of the research hotspots. Polychromatic sets theory (PST) is a new mathematic tool, which is especially suitable for formal hierarchical structure models. Based on PST, in this article, a new hierarchical representation model for tolerance synthesis is presented to realise integrated design of dimensional and geometric tolerances. According to the inference relations between unified and individual colours of PST, the synthesis matrices of variational geometric constraints (VGC) are established in the VGC tier of the model, and the synthesis matrices of tolerance types are established in the tolerance type tier of the model. On this basis, the synthesis processes from the feature tier to the VGC tier and from the VGC tier to the tolerance type tier can be realised. VGCs, which are achieved by the synthesis matrices of VGCs, can be combined together to establish a well-constrained VGC network (VGCN). Tolerance types, which are achieved by the synthesis matrices of tolerance types, can be added to the well-constrained VGCN to construct a well-constrained tolerance network. An application example is given in the article to illustrate the synthesis steps.

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Quick GPS: A new CAT system for single-part tolerancing

Cited by 57 publications

References 13 publications

Towards an ontology-supported case-based reasoning approach for computer-aided tolerance specification

Towards an ontology-supported case-based reasoning approach for computer-aided tolerance specification

Comparison of Analysis Line and Polytopes Methods to Determine the Result of a Tolerance Chain

A new method for automatic synthesis of tolerances for complex assemblies based on polychromatic sets

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