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광소자와 헬륨-네온 레이저를 이용한 디스크 캠의 진동 측정
유웅재(W. J. Yoo),이규섭(G. S. Lee),김재도(J. D. Kim) Korean Society for Precision Engineering 1995 한국정밀공학회지 Vol.12 No.10
The laser measurement system has been developed using He-Ne laser and photodiode. The laser beam intensity transmitted on a photodiode was disturbed by eccentrically rotating disk cam with various speeds. The photodiode and an amplifier were used to change the detected beam intensity into voltage. The digitized data through the developed system were recorded on a micro-computer by using a signal analysis program. Its reliability was ascertained by using FFT analyzer. The vibration of rotating disk cam can be analyzed by measuring the intensity change of laser beam which the results by FFT analyzer were similar to. The amplifier was devised to be able to modulate the fluctuations of laser beam. The voltage could be linearly recorded with the change of the laser beam intensity.
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디젤엔진 피스톤용 SCM440 의 레이저 표면경화부의 잔류응력
이동석,유웅재,김재도 ( D . S . Lee,W . J . Yoo,J . D . Kim ) 한국열처리공학회 1995 열처리공학회지 Vol.8 No.3
SCM440, which is widely used as the diesel engine piston of vessel, has been hardened by a CO₂laser with the wavelength of 10.6㎛. Laser hardening experiment has been carried out for the condition of a laser power 1㎾, the travel speed between 0.4 and 1.5m/min, and a rectangular-Gaussian beam. Residual stress has been measured by using middle point technique of half value width of X-ray diffraction method. It was found that the compressive residual stress with the range between 400 and 600㎒ has distributed in the laser hardening zones and the tensile residual stress between 100 and 200㎒ has distributed in the boundary of hardening zones.
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대형구조물 구동계통 실시간 시뮬레이션 모델 유도 및 연동 특성 분석에의 응용
김재훈,최영호,유웅재,유준,Kim, Jae-Hun,Choi, Young-Ho,Yoo, Woong-Jae,Lyou, Joon 한국군사과학기술학회 2000 한국군사과학기술학회지 Vol.3 No.1
A simulation model is developed to analyze the large-structure driving system and its integrated behavior in the whole weapon system. It models every component in the driving system such as mechanical and electrical characteristics, and it is programmed by simulation language in a way which strongly reflects the system's real time dynamics and reduces computation time as well. A useful parameter identification method is proposed, and it is tuned on the given physical system. The model is validated through comparing to real test, and it is applied to analysis and prediction of integrated system functions relating to the fire control system.
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반도체공장 Clean Room에 대한 화재요인 분석 및 성능위주 화재안전설계
서장훈,심상용,유웅재 대한안전경영과학회 2006 대한안전경영과학회 학술대회논문집 Vol.2006 No.11
In this report, we provide the focus on suggesting a method of estimating and measurement of CBM(Customer Behavior Model). Through the use of internet, a new trend of business for e-CRM on B2C Web Site known as EC has emerged. The purpose of this study is to identify the relationship between the customers of a shopping mall and CBM characteristics. It can be used to gain a better understanding of customers. From this we can determine trends, and so refine business toward customer's needs and target new products to particular customer groups. Result shows that there is a significant relationship between the customers pattern of shopping mall and CBM, CVM(Customer Visit Model).
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