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이민철(Min Cheol Lee),전만수(ManSoo Joun) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
In this paper, we apply a forging simulator to automatic simulation of a connecting-rod forging process and compare its results with others found in the literature. The process information comes from the distributed examples of DEFORM3D. The process is fully automatically simulated using the tetrahedral element capability of AFDEX3D, developed by the authors. Our results are compared with the results found from the related literature, already simulated using DEFORM3D by other researchers. The comparison shows that our results are relatively excellent especially in terms of mesh quality on which the solution accuracy depends mainly.
사면체요소와 육면체요소를 이용한 삼차원 단조 시뮬레이션 결과의 비교 및 검증
이민철(Min Cheol Lee),백종파(Jong Pa Baek),전만수(ManSoo Joun) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
In this paper, we simulate a rotor pole cold forging process by a forging simulator with both tetrahedral and hexahedral element capabilities and compare the predictions obtained by the two approaches with the experiments. Hexahedral element capability runs manually while tetrahedral element capability runs automatically with help of an intelligent remeshing technique. It is shown that the tetrahedral element capability can give quite accurate solution if assisted by the intelligent remeshing technique even though the tetrahedral element itself is not theoretically and numerically clear.
WPAN Platform과 레고 마인드스톰 NXT를 이용한 원격제어 로봇 개발에 대한 연구
이민철 ( Min-cheol Lee ),송영호 ( Young-ho Song ),이영철 ( Young-chul Lee ),김인환 ( In-hwan Kim ),정구민 ( Gu-min Jeong ) 한국정보처리학회 2009 한국정보처리학회 학술대회논문집 Vol.16 No.1
본 논문에서는 휴대폰과 LEGO Mindstorms NXT를 이용한 원격제어로봇 개발 모델을 제안하고 이를 기반으로 원격제어 로봇을 설계하였다. 제안하는 원격제어로봇 개발 방법은 LEGO Mindstorms NXT를 이용한 하드웨어 설계, 다양한 Tool을 이용한 소프트웨어 설계, Host System의 응용프로그램 개발로 구성되며, Host System으로는 WPAN Platform을 탑재한 휴대폰을, 통신 방식으로는 블루투스를 적용한다.
이민철(Min-cheol Lee),정석환(Suk-hwan Chung),권영삼(Young-sam Kwon),조주현(Ju-hyun Cho),전만수(Man-soo Joun) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.11
We developed a three-dimensional power metallurgy process simulator for die compaction and sintering analyses, called PMsolver3D. The simulator is based on the continuum models for die compaction and sintering process. The theories were given in detail with emphasis on the constitutive models. We adopted the tetrahedral mesh system to increase the applicability and automate the simulation including remeshing. Of course, we have the optional capability of hexahedral elements. Typical simulation examples of only die compaction analysis, only sintering analysis and the coupled analysis of die compaction and sintering were given, which shows the applicability and versatility of the developed program PMsolver3D.
형상정보가 없는 공종의 속성정보모델링 기법 개발에 관한 연구
이민철(Lee, Min-Cheol),이상진(Lee, Sang-Jin),옥종호(Ock, Jong-Ho) (사)한국CDE학회 2011 한국CDE학회 논문집 Vol.16 No.2
Construction industries worldwide have moved to Building Information Modeling environment in conjunction with IT technology progress. Korean domestic construction market is in the midst of enthusiastically adopting BIM technique and the public sectors try to apply the method to their projects. Difficulties have been introduced, however, in doing so mainly due to the complexity in reflecting the distinctions of the public cost estimate requirements to BIM modeling. The main objective of this study is to propose four kinds of BIM property information modeling methodologies which would be used in the quantity surveys of the public construction projects. To evaluate the applicability of the suggested modeling methods, the research performed a case study.