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병렬형 하이브리드 자동차의 SimulationX 모델 개발 및 연비 시뮬레이션
서영우(Y. W. Seo),한성민(S. M. Han),여현승(H. S. Yeo),이석우(S. W. Lee),류하오(Hao Liu) 유공압건설기계학회 2022 유공압건설기계학회 학술대회논문집 Vol.2022 No.12
Hybrid Electric Vehicles (HEVs) are an important seed in the process of converting from traditional internal combustion engine vehicles to eco-friendly vehicles. HEVs that use two energy sources have a complex structure, and thus, these two energy sources work independently/alternatively/jointly depending on road driving conditions in order to improve fuel efficiency. As HEVs are developed, it is becoming important to understand the operating principles and to interpret fuel economy performance in simulations. This research used simulationX, a commercial multi-domain analysis S/W, to develop a model for a parallel type hybrid vehicles, and implement fuel efficiency analysis. First, the heat engine, battery, electric motor, power train, etc. were modeled in a simulationX environment based on the parallel hybrid vehicle structure. Then, fuel efficiency analysis simulation was performed on driving condition of NEDC (New European Driving Cycle). The developed simulationX model for parallel type hybrid vehicle is prepared to develop a controller for fuel efficiency improvement in the future work.
이석우(S.W.Lee),최헌종(H.Z.Choi),최영재(Y.J.Choi),안건준(G.J.Ahn) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.4
As recently optical communication industry is developed, request of optical communication part is<br/> increased. Ferrule is very important part which determines transmission efficiency and quality of<br/> information in the optical communication part. Most of ferrule processes are grinding which request<br/> high processing precision. Particularly, concentricity and cylindricity of inner and outer diameter is very<br/> important. The co-axle grinding process of ferrule is to make its concentricity all of uniform before<br/> centerless grinding. Surface integrity of ferrule is affected by kind of grinding wheels, grinding<br/> conditions, and characteristic of workpiece and equipment. In this study, surface integrity of workpiece<br/> according to change of grinding wheel speed, feed rate, regulating wheel speed and grinding force is<br/> investigate to improve the concentricity and roundness of ferrule from many experiments.
남성호(S.-H. Nam),홍원표(W.-P. Hong),강은구(E.-G. Kang),이석우(S.-W. Lee),최헌종(H.-Z. Choi) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
Small and medium-sized enterprises should collaborate with themselves to reduce the cost and delivery, and to increase the productivity. Collaborative IT infrastructure like as e-Manufacturing collaborative hub system became more essential parts in their business among the enterprises. Furthermore, the enterprises using the hub system also require their own services corresponding to each enterprise-oriented business role. In this study, the component-based collaborative infrastructure is presented to take into account the support of collaboration services as well as the integration of business process. It has been also investigated that this infrastructure is advantageous to configure the enterprise-customized collaboration systems and to immediately support the system for the enterprises.