Abstract
This study proposes a robust multiobjective optimization approach using the satisficing tradeoff method (STOM). STOM is a multiobjective optimization method that obtains a highly accurate single Pareto solution. Conventionally, a robust design is formulated as a single-objective optimization problem, where the objective function is defined as the weighted sum of the mean and standard deviation of the performance index. In this study, the mean and standard deviation are formulated as individual objective function. The effect of uncertainty can be investigated through Pareto surface. In STOM, the multiobjective optimization problem is transformed into the equivalent single objective problem by introducing an aspiration level. As the obtained single Pareto solution corresponds to the aspiration level that implies the ratio of the designer's desired objective function, the designer can investigate only the desired space in detail through setting the aspiration without obtaining full Pareto surfaces. The validity of using STOM for a robust multiobjective optimization problem is discussed using numerical examples.
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Masahiro Toyoda is presently M.S. candidate in Department of Aerospace Engineering at Osaka Prefecture University in Japan. He received his B.S. degree in aerospace engineering from Osaka Prefecture University, Japan in 2012. His research interest is multiobjective optimization and its application to aerospace structural systems.
Nozomu Kogiso is presently an Associate Professor in Department of Aerospace Engineering at Osaka Prefecture University in Japan. He received his B.S. degree in physics from Nagoya University, Japan in 1988 and his M.S. and Dr. Eng. from Osaka Prefecture University in 1994 and 1997, respectively. His research interests include robust and reliability-based design optimization.
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Toyoda, M., Kogiso, N. Robust multiobjective optimization method using satisficing trade-off method. J Mech Sci Technol 29, 1361–1367 (2015). https://doi.org/10.1007/s12206-015-0305-9
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DOI: https://doi.org/10.1007/s12206-015-0305-9