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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Knowledge-based expert support in an assembly-oriented CAD environment

Mei, Hong January 2000 (has links)
Assembly-oriented design offers great potential for product rationalisation, increasing productivity and reducing lead time and cost. It results in simpler and more reliable products which are less expensive to assemble and manufacture. To facilitate assembly-oriented design, an assembly-oriented CAD environment is needed to incorporate Design for Assembly (DFA) evaluation from an early design stage. Assembly planning should also be integrated to support the DFA evaluation. This thesis reports the results of research towards supporting such an assembly-oriented CAD environment. A novel approach has been used to deploy an Expert Assembler to support proactive DFA evaluation and assembly sequence definition. This is particularly useful, as designers are rarely if ever assembly experts. Based on the fact that there are several areas needing expert support in this assembly-oriented CAD environment, but that different areas have very different requirements and different knowledge is involved, the Expert Assembler deployed contains several separated modules. Each module is an expert agent devised to tackle a problem area that uses a suitable problem solving strategy, knowledge representation and reasoning method. This brings a number of advantages that are detailed in the thesis. The thesis presents systematical ideas for support proactive DFA, with the focus on support for part count reduction and assembly sequence generation. This is realised by three elements of the expert agents: Part Count Advisor, Starting Part Advisor, and Next Part Advisor. Part count reduction is usually based on dialogue with the user. There is little computational support for this issue in any of the DFA methodologies and related literature. This research fills the gap: it brings computational support for part count reduction from the early design stage. The work has also made new progress in assembly sequence generation. The Starting Part Advisor and the Next Part Advisor cooperate with each other and with the user to provide suggestions dynamically and transparently regarding base part and the most suitable next part selection in assembly sequence definition. Case studies were used to test the effectiveness of the Advisors.
2

A methodology for producing and testing a Genesil Silicon Compiler designed VLSI chip which incorporates Design for Testability

Pooler, Brian Lee. January 1990 (has links) (PDF)
Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, September 1990. / Thesis Advisor(s): Loomis, Herschel H. Second Reader: Yang, Chyan. "September 1990." Description based on title screen as viewed on December 17, 2009. DTIC Descriptor(s): Scanning, Conversion, Files(Records), Simulation, Methodology, Models, Paths, Very Large Scale Integration, Time, Engineering, Silicon, Vector Analysis, Compilers, Automatic, Faults, Test And Evaluation. DTIC Identifier(s): Computer Aided Design, Circuit Testers, Theses. Author(s) subject terms: Design for testability, VLSI, Genesil Silicon Compiler, Automatic Test Generation, DAS 9100, DV550. Includes bibliographical references (p. 161-162). Also available in print.
3

An application of the Systems Engineering Process to the evaluation and selection of an architectural Computer Aided Design system /

Rindin, Kristen S., January 1993 (has links)
Report (M.S.)--Virginia Polytechnic Institute and State University. M.S. 1993. / Vita. Abstract. Includes bibliographical references (leaves 142-143). Also available via the Internet.
4

Design of a pipelined multiplier using a Silicon Compiler

Huber, Ronald S. January 1990 (has links) (PDF)
Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, June 1990. / Thesis Advisor(s): Loomis, Herschel H. ; Yang, Chyan. "June 1990." Description based on title screen as viewed on March 23, 2010. DTIC Identifier(s): Pipelines, Computer Aided Design, Compiler, Theses, Multiplication, Digital Systems. Author(s) subject terms: Silicon Compiler, Pipeline, Digital Multiplier. Includes bibliographical references (p. 93). Also available in print.
5

Hollowing and reinforcing 3D CAD models and representing multiple material objects for rapid prototyping /

Chiu, Wai-kei. January 2000 (has links)
Thesis (Ph. D.)--University of Hong Kong, 2000. / Includes bibliographical references (leaves 203-211).
6

Re-engineering portabililty of the Computer Aided Prototyping System (CAPS) /

Yetkin, Recep Erdinc. Enriquez, Sotero. January 1997 (has links)
Thesis (M.S. in Computer Science) Naval Postgraduate School, March 1997. / Thesis advisors, LuQi, Valdis Berzins. Includes bibliographical references (p. 323-324). Also available online.
7

Nesting automated design modules in an interconnected framework /

Young, Jared M. January 2005 (has links) (PDF)
Thesis (M.S.)--Brigham Young University. Dept. of Mechanical Engineering, 2005. / Includes bibliographical references (p. 131-139).
8

Computer-aided fixture design verification

Kang, Yuezhuang. January 2002 (has links)
Thesis (M.S.)--Worcester Polytechnic Institute. / Keywords: Fixture stiffness matrix; Jacobian matrix; kinetic model; geometric model; fixture design verification; stability analysis; tolerance analysis; tolerance assignment. Includes bibliographical references (p. 92-97).
9

Computer-aided design for rapid tooling : methods for mold design and design-for-manufacture

Chen, Yong 08 1900 (has links)
No description available.
10

Truss Parametrization of Topology Optimization Results with Curve Skeletons and Meta Balls

Denk, M., Rother, K., Paetzold, Kristin 18 June 2024 (has links)
Truss-like shapes can occur in topology optimization described by an assembly of finite elements or its boundary represented as a polygon mesh. Such shape description does not cover a common engineering parametrization like the lines of a frame structure and its corresponding cross-section. This article addresses the truss-parametrization of such optimization using curve skeletons and Meta Balls. While the curve skeleton is common in the truss-parametrization, including Meta Balls can lead to an overall implicit and smooth shape description.

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