Decomposition-based design optimization strategies are used to solve complex engineering system problems that might be otherwise unsolvable. Yet, the associated computational cost can be prohibitively high due to the often large number of iterations needed for coordination of subproblem solutions. To reduce this cost one may exploit the fact that some systems may be weakly coupled and their interactions can be suspended with little loss in solution accuracy. Suspending such interactions is usually based on the analyst’s experience or experimental observation. This article introduces an explicit measure of coupling strength among interconnected subproblems in a decomposed system optimization problem, along with a systematic way for calculating it. The strength measure is then used to suspend weak couplings and, thus, improve system solution strategies such as the model coordination method. Examples show that the resulting strategy may decrease the number of required function evaluations significantly.
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e-mail: dlpeters@umich.edu
e-mail: ulsoy@umich.edu
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September 2011
Research Papers
Generalized Coupling Management in Complex Engineering Systems Optimization
Diane L. Peters,
e-mail: dlpeters@umich.edu
Diane L. Peters
University of Michigan
, 2250 G. G. Brown Building, 2350 Hayward Street, Ann Arbor, MI 48109
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A. Galip Ulsoy
A. Galip Ulsoy
Department of Mechanical Engineering,
e-mail: ulsoy@umich.edu
University of Michigan, Ann Arbor, MI 48109-2125
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Sulaiman F. Alyaqout
Diane L. Peters
University of Michigan
, 2250 G. G. Brown Building, 2350 Hayward Street, Ann Arbor, MI 48109e-mail: dlpeters@umich.edu
A. Galip Ulsoy
Department of Mechanical Engineering,
University of Michigan, Ann Arbor, MI 48109-2125
e-mail: ulsoy@umich.edu
J. Mech. Des. Sep 2011, 133(9): 091005 (10 pages)
Published Online: September 9, 2011
Article history
Received:
September 27, 2010
Revised:
June 22, 2011
Online:
September 9, 2011
Published:
September 9, 2011
Citation
Alyaqout, S. F., Peters, D. L., Papalambros, P. Y., and Ulsoy, A. G. (September 9, 2011). "Generalized Coupling Management in Complex Engineering Systems Optimization." ASME. J. Mech. Des. September 2011; 133(9): 091005. https://doi.org/10.1115/1.4004541
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