Prudent constraint-handling technique for multiobjective propeller optimisation |
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Authors: | Romanas Puisa Heinrich Streckwall |
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Affiliation: | (1) Department of Systems Engineering and Naval Architecture, National Taiwan Ocean University, Keelung, Taiwan, ROC;(2) Hung Shen Propellers Co., LTD, Kaohsiung, Taiwan, ROC; |
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Abstract: | The paper presents an alternative constraint-handling technique that converts a nonlinear constrained programming problem
into an unconstrained multi-objective optimisation problem. The technique is derived from the behavioural memory constraint-handling
method, which was originally implemented for single-objective optimisation with genetic algorithms. We compare our presented
technique with two other popular constraint-handling concepts and demonstrate its superiority over them when applied to a
propeller optimisation problem. We conclude that the multi-objective behavioural memory constraint-handling technique conjugated
with the non-dominated sorting genetic algorithm (NSGA-II) is a prudent method to apply to problems with an infeasible initial
design and where constraints have a natural order of satisfaction, which, if not conformed to, would lead to unrealistic designs
that impair the search by GA. |
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