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윤철용(Chul-Yong Yoon),정인호(In-Ho Chung),정병조(Byeong-Jo Jung),김성용(Sung-Yong Kim),현동훈(Dong-Hoon Hyun) 한국생산제조학회 2011 한국생산제조시스템학회 학술발표대회 논문집 Vol.2011 No.4
There are uncomfortableness because of existing fluorescent lights which are installed sparsely and have illuminance differences. To improve these problems, we developed LED lights with reflecting optical system. After designing reflector, simulation was made with same conditions as fluorescent lights, then we have results of 70° distribution curve and uniformity ratio of illuminance on wide area.
윤철용(Yoon chul yong),김부태(Kim bu tae),문재일(Moon jae ill),현동훈(Hyun dong hoon) 한국생산제조학회 2009 한국공작기계학회 추계학술대회논문집 Vol.2009 No.-
This paper has to gain visual effect as light scattering by various angle and phase using optical micro pattern for metal. Also applying to optical micro pattern for metal surface design by developing optical technology and ultra-precision machining technology. Ultra precision technician gains shape precision for micrometer unit and ultra precision within nanometer. The pattern precision for use this technician that we use software program to see the light scattering by various pattern forms. We focus on approaching the simulation for detail and reliability by reducing the result of errors for software.
반사 광학계를 이용한 150W급 LED 가로등 개발에 관한 연구
윤철용(Chul-Yong Yoon),정병조(Byeong-Jo Jeong),서정철(Jung-Chul Seo),현동훈(Dong-Hoon Hyun) 한국생산제조학회 2010 한국공작기계학회 추계학술대회논문집 Vol.2010 No.-
This study is aimed to develop 150W LED street light using mirror optical system to improve existing LED street lights which have glaring effects and do not have luminous intensity uniformity. This paper attempts to solve to use the aspheric technology with different concept. To removing glaring and improve luminous Intensity uniformity, we implemented optical design with suitable structure and aspheric data by using an optical program. We analyzed results by using a lie s simulation program before making prototype. After making LED lights through these analysises, conclusion was made that reflectivity of reflector has great influence.
무베어링 허브 훨타워 시험을 위한 무힌지 블레이드 보강
김태주,윤철용,기영중,김승호,정성남,Kim, Tae-Joo,Yoon, Chul-Yong,Kee, Young-Joon,Kim, Seung-Ho,Jung, Sung-Nam,Dhadwal, M.K. 항공우주시스템공학회 2012 항공우주시스템공학회지 Vol.6 No.1
During helicopter rotor system development process, whirl tower test is conducted basically. For conducting whirl tower test during bearingless hub development process, design new blade or using existing blade with repair or remodeling. Because simple shape and efficient aerodynamic characteristic, BO-105 blade is used for hub system development widely. Originally BO-105 Blade is used for hingeless hub, so flap stiffness and lag stiffness on blade root area is relatively low. So appling BO-105 blade to bearingless hub whirl tower test, root area have to be reinforce. In this paper, suggest reinforcement method of BO-105 blade root area.
초정밀가공 기술을 이용한 광학 마이크로패턴의 광 반사 효과에 관한 연구
유춘근,윤철용,현동훈,Yoo, Chun-Kun,Yoon, Chul-Yong,Hyun, Dong-Hun 한국생산제조학회 2009 한국생산제조학회지 Vol.25 No.2
Because the Ultra-Precision Technology increase its competitiveness in the field of the design, precision of processing technology, confidence and fixation degree are major considerations. According to Pattern shapes using these processing technologies, Light Reflection has influence on the sense of sight about human being. Based on background of these studies, we draw a plan about a round workpiece using a 3D design program and analyze the effect on Light Reflection changing a pattern angle and a source of light through SPEOS program in this research. We make Pattern form as V-Shape, and compare the area distributed by Light Reflection by classifying angle into 4 and analyze changes according to a source of light. In order to measure and evaluate the data from simulation analysis we has manufactured Diamond Tool and has processed Pattern precision using a Ultra-Precision Machine. Based on the result of this study, we forecast that the field of design will achieve rapid growth due to Ultra-Precision Technology in the world market.