# An Algebraic Approach to Feature Interactions

 dc.contributor.advisor Nau, D. en_US dc.contributor.author Karinthi, Raghu R. en_US dc.date.accessioned 2007-05-23T09:46:49Z dc.date.available 2007-05-23T09:46:49Z dc.date.issued 1990 en_US dc.identifier.uri http://hdl.handle.net/1903/5034 dc.description.abstract Planning 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.

en_US dc.format.extent 4685214 bytes dc.format.mimetype application/pdf dc.language.iso en_US en_US dc.relation.ispartofseries ISR; PhD 1990-8 en_US dc.subject computer aided manufacturing en_US dc.subject computer integrated manufacturing en_US dc.subject feature extraction en_US dc.subject flexible manufacturing en_US dc.subject manufacturing en_US dc.subject Systems Integration en_US dc.title An Algebraic Approach to Feature Interactions en_US dc.type Dissertation en_US dc.contributor.department ISR en_US

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