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홍민성,조은희,Hong, Min-Sung,Cho, Eun-Hee 한국생산제조학회 2009 한국생산제조학회지 Vol.25 No.2
A fuel tank of a vehicle is an important part due to its flammable contents ant its importance during crash conditions. Therefore, the fuel tank's design should be assessed for durability and robustness to ensure safety during the early development phase. Previously, evaluation for the durability was done by testing in physical driving conditions which could only be done after the completion of the vehicle. Computation simulation is a more effective method to evaluate the strength and durability of the fuel tank during the early stage. In this paper, two outstanding computational simulation methods are studied. One evaluates PV cycle fatigue due to build up pressure in the fuel tank and the other evaluates the PSD vibration fatigue from modal characteristics. The results show that computational methods agree with physical tests and are thus suitable to analyze the strength and durability of the fuel tank at early development phase.
홍민성,김종현,Hong, Min-Sung,Kim, Jong-Hyun 한국생산제조학회 2010 한국생산제조학회지 Vol.25 No.6
In general, spot welding is used at no welding rod or flux for the process, low welding point temperature compared to arc welding, short heating time, less damage to the parent material, and low deformation and residual stress, relatively. Also, because of the pressurization effect, better mechanical qualities of the welding parts are obtained. Therefore, in various fields of industry its rapid operation speed can make mass production possible such as motor industry. In FEM analysis for the spot welding process, it is effective to use simple modeling rather than complicated one because of its numerous number of spots and reduction of analysis time. Therefore, this study provides with not only simplification of modeling analysis by using beam component composition of structure without re-compositing the spot welding point mesh but also modeling analysis of which property of fracture strength is reflected. In addition complete spot welding model is examined at rectangular post shape (hat shape) by impact test, compared the results, and verified its validity. As a result, it is possible to optimize the welding position and to recognize the strength of structure and the proposed equal distance model shows the effect of welding point reduction and improvement of stiffness.
생산계획과 제조 스케줄링에서의 ICT 기반 지능형 제조 동향
홍민성,최경미 한국통신학회 2024 정보와 통신 Vol.41 No.2
최근 ICT 기반의 제조 산업이 자동화에서 지능형으로 전환되며 다양한 지능형 기법들이 활용되고 있다. 본 논문에서는 최근의 연구사례를 기반으로 이러한 기법들을 조사하여 생산계획(Production Planning)과 제조 스케줄링(Manufacturing Scheduling) 분야로 설명하였다. 그 외 방위 제조 산업에서의 ICT 도입 사례를 기반으로 지능화 동향을 조사하였다.
홍민성,김주철,Hong, Min-Sung,Kim, Joo-Chul 한국생산제조학회 2009 한국생산제조학회지 Vol.26 No.3
The motion base to a film used in 4D cinema theaters or theme parks is different depending on the operator's control or hardware system and this causes inefficiency in management of the theater. There are several different simulation software on the present market, but these are difficult for an animation producer to use them. This study introduces the idea in which a film producer simulates the movement of the motion base by using computer graphic animation tools mostly adopted by production for creating 3D animation and motion control data. Maya and 3D Cross were used to show the path of a motion camera visually. Attitude and axis control data were extracted from the movement of the virtual motion base and were used to control a prototype of the motion base. As a result, the motion control data from computer graphic animation tools can be created so that a film producer can create standard motion control data independently regardless of the hardware and operator's skill.