Abstract/Details

A performance-based representation for engineering design


2001 2001

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Abstract (summary)

Engineering design is an unstructured but logic-based process where successive iterations of synthesis and analysis eventually converge to the desired solution. Due to the sophisticated nature of design, it is rarely feasible to deduce the final design from the initial specifications. A performance-based representation and its applications are developed in this dissertation to assist the designer in synthesizing design artifacts, gaining insight into the performance attributes of a design problem, and making rational decisions throughout an iterative design process. To achieve this goal, an Extensive Simplex Method is proposed to traverse the extreme points of linear model and build the graph-based design and performance space. Based on the established feasible space, the designer can assess the system performance capability, evaluate the feasibility of a design alternative, achieve multiple feasible solutions, negotiate the trade-off of system performance attributes, and eventually converge to a desired solution.

The methodology is applied to a beam design problem and a molding process control problem. While the first example demonstrates the utility of the representation in concept selection, parametric design refinement, and inverse reasoning, the second example focuses on the process tuning and flexibility evaluation of a digital video disc molding process. Both case studies indicate that the performance-based representation can help the designer not only to obtain a flexible design solution with better overall system performance, but also to gain insight to the design problem and its specifications. Such an insight to problem leads to increased competence in product design.

Indexing (details)


Subject
Mechanical engineering
Classification
0548: Mechanical engineering
Identifier / keyword
Applied sciences; Decision-making; Design representation; Engineering design; Extensive simplex method; Flexibility
Title
A performance-based representation for engineering design
Author
Zhu, Liang
Number of pages
195
Publication year
2001
Degree date
2001
School code
0118
Source
DAI-B 62/10, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
ISBN
9780493393865, 0493393862
Advisor
Kazmer, David O.
University/institution
University of Massachusetts Amherst
University location
United States -- Massachusetts
Degree
Ph.D.
Source type
Dissertations & Theses
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
3027280
ProQuest document ID
304699007
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/304699007
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