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|Title: ||Operating invalid feature-based models|
|Authors: ||Hounsell, Marcelo da Silva|
|Issue Date: ||1998|
|Publisher: ||Society for Design and Process Science, USA|
|Citation: ||HOUNSELL, M.S. and CASE, K., 1998. Operating invalid feature-based models. IN: Ertas, A. et al. (eds.) Proceedings of the Third Biennial World Conference on Integration Design and Process Technology, Berlin, Germany, 5-9 July 1998, IDPT-3, pp. 151 - 158.|
|Abstract: ||A valid feature-based representation is one where
instantiated features in a model agree with the features'
expected behaviours, available and defined as a library.
Invalid feature-based models happen when manipulations
on the model change the interrelationship among features
therefore changing the behaviour of an instantiated
Freedom of manipulation is an intrinsic advantage
of using a CAD system and it is taken for granted.
However, even the most basic manipulation, such as
"adding" a feature to a model, is capable of disrupting the
validity of a representation. Furthermore, invalid models
could compromise the usefulness of any following
analysis on it.
Thus, identifying means to operate on an invalid
model to make it valid, through "revalidation operations",
is a necessity in Feature-based CAD systems. It allows
conventional CAD systems (usually more preoccupied
with representing and producing feature-like shapes
within a geometrically constrained environment) to
interface more easily for example with CAPP systems
(usually more preoccupied with planning problems than
with the correctness of the representation).
The framework of a feature-based validation
system, called FRIEND (Feature-based Reasoning
system for Intent-driven Engineering Design), and a
discussion on representation validity analysis is presented
with emphasis on identifying and discussing "revalidation
|Description: ||This is a conference paper.|
|Version: ||Accepted for publication|
|Appears in Collections:||Conference Papers and Presentations (Mechanical, Electrical and Manufacturing Engineering)|
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