NSGA-II and SPEA2+SDE: A comparative study

Abstract

Design Optimization is research area which was carried out a lot on the world, with many applications in the specifications of mechanical engineering, aerospace engineering, civil engineering. The global optimization methods are more effective than local optimization methods. In this article, the authors will deal with 2 multi-objective global optimization methods NSGA-II and SPEA2+SDE. The authors will do novel research about comparing the efficiencies of these multi-objective optimization methods. For the sample problems in this article, it is investigated that SPEA2+SDE can produce optimal solutions very close to exact Pareto front. In these circumstances, SPEA2+SDE is better than NSGA-II in finding multi-objective optimization and optimal front. It is also investigated that SPEA2+SDE will cost more computational time than NSGA-II. In summary, SPEA2+SDE is better than NSGA-II though SPEA2+SDE is more time-consuming.

Keywords: Design optimization; multi-objective optimization Methods; SPEA2+SDE; NSGA-II.