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심문보,서명원,Shim, Mun-Bo,Suh, Myung-Won 대한기계학회 2002 大韓機械學會論文集A Vol.26 No.6
In an attempt to solve multiobjective optimization problems, many traditional methods scalarize the objective vector into a single objective. In those cases, the obtained solution is highly sensitive to the weight vector used in the scalarization process and demands the user to have knowledge about the underlying problem. Moreover, in solving multiobjective problems, designers may be interested in a set of Pareto-optimal points, instead of a single point. In this paper, pareto-based Continuous Evolutionary Algorithms for Multiobjective Optimization problems having continuous search space are introduced. This algorithm is based on Continuous Evolutionary Algorithms to solve single objective optimization problems with a continuous function and continuous search space efficiently. For multiobjective optimization, a progressive reproduction operator and a niche-formation method fur fitness sharing and a storing process for elitism are implemented in the algorithm. The operator and the niche formulation allow the solution set to be distributed widely over the Pareto-optimal tradeoff surface. Finally, the validity of this method has been demonstrated through a numerical example.
서명원(Myung-Won Suh),권성진(Seong-Jin Kwon),심문보(Mun-Bo Shim),조기용(Ki-Yong Cho),이은표(Eun-PyoLee) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
As the bus is the most public transportation system, the existing researches have focused on the transportation capacity and the carrying power. On the order hand, the research and development on the driving stability, safety and convenience of passengers has been increased actively in these days. in this paper, we have investigated the design of door mechanism in urban buses that are useful for passengers. The mathematical models for the kinematic and dynamic analysis of door mechanism are constructed for computer simulation, which may reduce time and cost of a vehicle test and an experiment. The simulation program enables designers to analyze the behavior characteristics of door mechanism according to the design variables and the various simulation conditions.
심문보,최연선 成均館大學校 科學技術硏究所 1999 論文集 Vol.50 No.1
Gear plays an important role for the power transmission of a machine. The rotation of driven gear should be that of the driving gear with the proportion of the gear ratio. However, the deviations between them are resulted from the deflections due to transmission error, which leads to vibrations and noise during gear meshing. Transmission error is defined as the difference of the rotation between driving and driven gear due to teeth deformation, which also causes an interference during meshing. The interference is one of severe causes of the vibration and noise of gear driving system. In this study, a tooth flank modification is suggested for the prevention of the interference by numerical simulation of gear meshing. The compliance of gear tooth and transmission error are calculated for the tooth modification. The interference due to transmission error is predicted numerically and the quantity of tooth flank modification is calculated to remove the interference.