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 Centre National de la Recherche Scientifique  Institut National Polytechnique de Grenoble  Université Joseph Fourier Laboratoire G-SCOP 46, av Félix.

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Presentation on theme: " Centre National de la Recherche Scientifique  Institut National Polytechnique de Grenoble  Université Joseph Fourier Laboratoire G-SCOP 46, av Félix."— Presentation transcript:

1  Centre National de la Recherche Scientifique  Institut National Polytechnique de Grenoble  Université Joseph Fourier Laboratoire G-SCOP 46, av Félix Viallet Grenoble Cedex ROMMA Task 1 Model Functional Analysis Status Briefing Ahmad Shahwan Moreno Trlin Gilles Foucault Jean-Claude Léon G-SCOP Laboratory Université de Grenoble, Grenoble-INP INRIA Rhone-Alpes February 2012

2 Motivation Engineers / Manual Work Semantic Annotation Design ModelSimulation Model Idealization Functional Properties

3 Data and Process Flow Diagram Maximal Surface/Edges Detection STEP File Geometric Interaction Detection Initialization of the Instances Knowledge Base Geometric CI Graph Conventional Interfaces Taxonomy Reducing Uncertainty Using Ref State 1 Domain Specific Knowledge Functional CI Graph (all possible interpretation) Reducing Uncertainty Using Rules Functional Designations (multiple suggestions) Annotated Model Interpretations Internal Forces Screws Reducing Uncertainty Using Ref State 2 Kinematic Screws Kinematic Constraints Functional CI Graph (less interpretations) Matching Components with Functional Designations Functional CI Graph (least interpretations) Functional Designations Taxonomy Supplementary Rules Functional Patterns Entity Knowledge Base Unique B-Rep Model

4 Currently Implemented Modules Maximal Surface/Edges Detection STEP File Geometric Interaction Detection Initialization of the Instances Knowledge Base Geometric CI Graph Conventional Interfaces Taxonomy Reducing Uncertainty Using Ref State 1 Domain Specific Knowledge Functional CI Graph (all possible interpretation) Reducing Uncertainty Using Rules Functional Designations (multiple suggestions) Annotated Model Interpretations Internal Forces Screws Reducing Uncertainty Using Ref State 2 Kinematic Screws Kinematic Constraints Functional CI Graph (less interpretations) Matching Components with Functional Designations Functional CI Graph (least interpretations) Functional Designations Taxonomy Supplementary Rules Functional Patterns Entity Knowledge Base Unique B-Rep Model Implemented Partially implemented

5 Mechanical Analysis Planar Contact Cylindrical Interference Spline Link Planar Support Threaded Link Planar Support Unbalanced Balanced interpretations Two solutions (or more) are evenly correct from a geometrical point of view  Need for other criteria to eliminate irrelevant one(s).

6 The Algorithm #1 #0#2 Conical ContactPlanar Contact Cylindrical Interference Conventional Interface Graph Initialization of instances Conical SupportPlanar Support Threaded Link Spline Link Geometric Analysis CI Taxonomy

7 The Algorithm #1 #0#2 Conical ContactPlanar Contact Cylindrical Interference Mechanical Analysis Conical SupportPlanar Support Threaded Link Spline Link CI#1 CI#2 CI#1 CI#2 CI#1 CI#2 Spline Link @1 CI#1 CI#

8 The Algorithm #1 #0#2 Conical SupportPlanar Support Threaded Link Detection of Functional Designations Coaxial/Concentric Orthogonal FD Taxonomy Capscrew

9 Examples

10 Cylindrical interferences could be resolved. No decision could be taken about cylindrical contacts

11 Examples We where able to decide about the threaded link for the counter-nut, but not for the nut. Again, application of rules. ? Threaded Link

12 Thanks


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