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An Algebraic Approach to Feature Interactions

dc.contributor.advisorNau, D.en_US
dc.contributor.authorKarinthi, Raghu R.en_US
dc.description.abstractPlanning the manufacture of machined parts requires a great deal of geometric reasoning. One of the key steps in this task is the derivation of machinable features from a solid model of the part. Regardless of the approach used for obtaining the features, geometric interactions among the features can create situations where there are several possible feature representations for the same part. This presents a problem in planning the manufacture of the part, since some of these representations may be manufacturable and some may not. This dissertation presents an automatic way of computing alternate feature interpretations using an algebra of feature interactions. The algebra is intended to enable automated process planning systems to decide whether various interpretations of a part as a collection of machinable features are feasible for manufacturing, and among the feasible ones, which is the most appropriate one for manufacturing. Alternate feature interpretations are computed by performing operations in the algebra. Furthermore, various provable properties of the feature algebra aid in resolving several of the feature interactions without even applying the operations in the algebra. The operations in the algebra are defined on the set of all compact, regular, semi-analytic solids. A restricted subset of the algebra has been implemented in a geometric reasoning system, for use with the Protosolid solid modeler and the EFHA process planning system (which were developed earlier at the University of Maryland). We have shown through experiments that computing the operations of the feature algebra as developed in this dissertation is much more efficient than computing them by converting them to quiries to solid modeler.<P>en_US
dc.format.extent4685214 bytes
dc.relation.ispartofseriesISR; PhD 1990-8en_US
dc.subjectcomputer aided manufacturingen_US
dc.subjectcomputer integrated manufacturingen_US
dc.subjectfeature extractionen_US
dc.subjectflexible manufacturingen_US
dc.subjectSystems Integrationen_US
dc.titleAn Algebraic Approach to Feature Interactionsen_US

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