Early in the engineering design cycle, it is difficult to quantify product reliability or compliance to performance targets due to insufficient data or information to model uncertainties. Probability theory can not be therefore, used. Design decisions are usually, based on fuzzy information that is vague, imprecise qualitative, linguistic or incomplete. Recently, evidence theory has been proposed to handle uncertainty with limited information as an alternative to probability theory. In this paper, a computationally efficient design optimization method is proposed based on evidence theory, which can handle a mixture of epistemic and random uncertainties. It quickly identifies the vicinity of the optimal point and the active constraints by moving a hyper-ellipse in the original design space, using a reliability-based design optimization (RBDO) algorithm. Subsequently, a derivative-free optimizer calculates the evidence-based optimum, starting from the close-by RBDO optimum, considering only the identified active constraints. The computational cost is kept low by first moving to the vicinity of the optimum quickly and subsequently using local surrogate models of the active constraints only. Two examples demonstrate the proposed evidence-based design optimization method.
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ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
September 24–28, 2005
Long Beach, California, USA
Conference Sponsors:
- Design Engineering Division and Computers and Information in Engineering Division
ISBN:
0-7918-4739-X
PROCEEDINGS PAPER
A Design Optimization Method Using Evidence Theory Available to Purchase
Zissimos P. Mourelatos,
Zissimos P. Mourelatos
Oakland University, Rochester, MI
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Jun Zhou
Jun Zhou
Oakland University, Rochester, MI
Search for other works by this author on:
Zissimos P. Mourelatos
Oakland University, Rochester, MI
Jun Zhou
Oakland University, Rochester, MI
Paper No:
DETC2005-84693, pp. 1153-1161; 9 pages
Published Online:
June 11, 2008
Citation
Mourelatos, ZP, & Zhou, J. "A Design Optimization Method Using Evidence Theory." Proceedings of the ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 2: 31st Design Automation Conference, Parts A and B. Long Beach, California, USA. September 24–28, 2005. pp. 1153-1161. ASME. https://doi.org/10.1115/DETC2005-84693
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