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TECHNICAL PAPERS

Enforcing Model Validity by Automatic Adjustment

[+] Author and Article Information
Alex Noort, Willem F. Bronsvoort

Computer Graphics and CAD/CAM Group Faculty of Information Technology and Systems Delft University of Technology Mekelweg 4 2628 CD Delft The Netherlands

J. Comput. Inf. Sci. Eng 1(4), 311-319 (Oct 01, 2001) (9 pages) doi:10.1115/1.1431549 History: Received August 01, 2001; Revised October 01, 2001
Copyright © 2001 by ASME
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References

Figures

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A feature model with non-critical dimensions
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The system has automatically changed the invalid model of Fig. 1 into a valid one
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A feature class can be used to create a feature instance by specifying values for its parameters
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The solving scheme and the moments that it decides whether a model is valid or not
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If the solving scheme (box a) finds a model to be invalid, the model may be automatically adjusted by the system (box b)
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A model with variant positions for the stiffeners
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The dependency graph of the model of Fig. 6 with the model constraint (newdist) added
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A model with a variant width for the stiffeners
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The integrated dependency graph of the model of Fig. 8 with the algebraic constraint added
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A model with two variant feature parameters
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Three models that are created during the parameter space sampling process; only the last one is valid
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A feature model with its variant parameters
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The invalid model that results after adding a new constraint that specifies the distance between the front face of the base block and the front face of the protrusion; the other dependencies in the model involved in this distance are also shown
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After changing the variant length parameter of the protrusion, the model has become valid again
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The prototype feature model of the family of moving yaws of a bench vice, and the parameters of this family
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The first attempt to create a member of the family was not successful (a), but the yaw could be automatically adjusted into a member of the family (b)
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A detail design view of a product that does not satisfy all manufacturing constraints (a) and an incomplete manufacturing planning view for it (b)
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Five feature parameters determine the distance between the protrusions
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The adjusted model of the design view (a) and the corresponding model of the manufacturing planning view (b)

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