Type of Document	Dissertation
Author	Jayaram, Uma
URN	etd-05222007-091345
Title	Extracting dimensional geometric parameters from B-spline surface models
Degree	Ph. D.
Department	Mechanical Engineering
Advisory Committee	Advisor Name Title A. Myklebust Committee Chair
Keywords	Airplanes Design and construction Data processing. Geometrical models Data processing. Computer-aided design.
Date of Defense	1991-11-21
Availability	restricted
Abstract In an integrated design environment, the common thread between the different design stages is usually the geometric model of the part. However, the requirements for the geometric definition of the design is usually different for each stage. The transformation of data between these different stages is essential for the success of the integrated design environment. For example, conceptual design systems usually deal with geometric dimensional parameters (e.g. length, radius, etc.) whereas preliminary design systems frequently require the geometry definition to be in the form of surface models. This dissertation presents the necessity and scope of creating and implementing methodologies to obtain dimensional geometric parameters from the surface description of an object. Since the study of geometric modeling and parametric surfaces is a new field, few classical methods are applicable. Methods and algorithms for the extraction of various geometry parameters are created. A few methods to pre-process and manipulate these surfaces before the parameter extraction methods can be applied are outlined.
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