Software agents and assistants, together with their adequate visual representations, lead to so-called social user interfaces, incorporating natural language interaction, context awareness and anthropomorphic avatars....
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A procedure is presented for the application of linear multipoint constraints. The procedure employs the transformation approach for constraint application which reduces the number of equations to be solved by the num...
A procedure is presented for the application of linear multipoint constraints. The procedure employs the transformation approach for constraint application which reduces the number of equations to be solved by the number of constraints. However, the matrix operations implied by the approach are avoided by the proper construction of the constraint equations. A specific procedure for carrying out the constraint application process as part of the assembly of the global stiffness matrix is given.
In summary, the ROSE system has been designed to allow efficiency to be combined with fiexibility for support of interactivecomputergraphics applications. The object paradigm is exploited throughout all aspects of t...
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One of the major obstacles in CAD is the lack of available software systems that can effectively manage the massive amounts and diverse types of data necessary to describe designs. In this paper, we focus on this prob...
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The metaphor of a 'desktop' as a user interface was useful for the migration from mainframe applications to personal computers. But it must be re-evaluated when thinking about new concepts and implementations ...
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AbstractThe ability of the finite octree and finite quadtree automatic mesh generators to satisfy effectively a wide variety of meshing capabilities is demonstrated. Areas considered include the ability to integrate e...
AbstractThe ability of the finite octree and finite quadtree automatic mesh generators to satisfy effectively a wide variety of meshing capabilities is demonstrated. Areas considered include the ability to integrate easily with geometric modelling systems, versatile interactive mesh control functions, the ability to reorder unknowns directly from the finite element data structure and the ability to support automated finite element modelling.
A prototype feature extraction system based on frame representation of part data and features is presented. A feature description language (FDL), based on semantic nets, is described. The objective of this approach is...
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A prototype feature extraction system based on frame representation of part data and features is presented. A feature description language (FDL), based on semantic nets, is described. The objective of this approach is to provide an intelligent and flexible link between design and manufacturing. Finally, the system implementation and sample results are discussed.< >
A newly developed interactivegraphics CAD package for linear multivariable control systems in the parameter space framework is presented. By direct geometric interpretation of stability, performance, robustness, inte...
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A newly developed interactivegraphics CAD package for linear multivariable control systems in the parameter space framework is presented. By direct geometric interpretation of stability, performance, robustness, integrity, actuator constraints, and other practically important objectives, the 30 capabilities of high-performance interactivecomputergraphics systems can be employed to design directly in the space of free system parameters. Intelligent strategies help to access high-dimensional parameter spaces by decompositions or neuristic search for display subspaces. The structure and computer realization of the package is discussed with special emphasis on the unique user-computer interaction features. Design examples show application of the main techniques for up to 15-dimensional parameter spaces and illustrate the potential as an engineering analysis and design environment.
The world-wide demand for increased industrial productivity has created a critical need for engineers trained in computergraphics and computer-aided design. Rensselaer Polytechnic Institute is the first U.S. universi...
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The world-wide demand for increased industrial productivity has created a critical need for engineers trained in computergraphics and computer-aided design. Rensselaer Polytechnic Institute is the first U.S. university to make a major commitment to computergraphics and CAD by establishing a 1.2 million dollar center for interactivecomputergraphics in the School for Engineerina. This paper explores the role of interactivecomputergraphics for instruction and design in control, based on the experiences gained at RPI.
In the design of discrete part shapes, the specification of tolerance constraints can have major consequences for product quality and cost. Traditional methods for tolerance analysis and synthesis are timeconsuming, a...
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