• Proceedings of the KSEEG Conference
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• 2007.04a
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• pp.157-157
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• 2007

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• Polymer Science and Technology
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• v.21 no.4
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• pp.336-344
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• 2010

• Proceedings of the Korean Nuclear Society Conference
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• 2002.05a
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• pp.75.2-75
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• 2002

• Journal of Drive and Control
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• v.8 no.1
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• pp.55-59
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• 2011

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2010.11a
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• pp.835-836
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• 2010

• The Optical Journal
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• s.174
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• pp.30-31
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• 2019

유럽핵물리입자연구소, CERN은 대형강입자가속기(LHC)가 작동할 때 얻을 수 있는 순간의 장면을 스냅샷으로 남기기 위해 충분한 민감도와 동작 범위를 가진 탐지기가 필요했다. 이렇게 개발된 방사선 탐지기술은 유럽우주국 ESA에 의해 우주로 날아갔다. 그리고 이제는 역사적인 예술품을 분석하고, 위조품을 발견하는 데 사용되고 있다.

• 한국신재생에너지학회:학술대회논문집
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• 2005.11a
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• pp.693-697
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• 2005

This study was performed to develop accelerated life test method of the wind-turbine gearbox using accumulated damage theory that used to model the fatigue of parts that receive variable load. The accumulated damage theory was introduced, and the estimation of life and calculation of accelerated life test time was illustrated. As the actual application example, accelerated life test method of the gearbox was described. Life distribution of the wind-turbine gearbox was supposed to follow Weibull distribution and life test time was calculated under the conditions of average life (MTBF) 140,600 hours and 99% reliability for one test sample According to the accumulated damage theory, because test time can shorten in case increase test load, test time could be reduced by 1.2 years when we put the load 1.2 times of rated load than 0.93 times of rated load that is equivalent load calculated by load spectrum of the wind turbine. This time, acceleration coefficient was 21.3. This accelerated test method was used to develop accelerated test method of gear reducer, gear and bearing as well as the industrial gearbox and it is considered to be applied comprehensively to mechanical parts the fatigue of which is happened by load or pressure etc.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.428_429
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• 2009

전력계통 운용시 고장이 발생하면 계통 운전원은 계전기 및 차단기 관련 동작정보 및 경보로부터 해당 고장내용을 판단하고 계통복구를 위한 조작을 행한다. 본 논문에서는 현재 건설중인 양성자가속기 연구센터의 전력 계통 운용시 발생한 고장에 따른 다중경보신호를 분석하기 위하여 전력계통의 고장영역별로 동작하는 보호계전기 신호, 차단기 신호 및 경보신호를 분류함으로써 이를 향후 전력계통 운용시 고장진단을 위한 기초자료로 활용하고자 한다.

• 한국신재생에너지학회:학술대회논문집
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• 2007.06a
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• pp.378-382
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• 2007

To improve the reliability for a wind-turbine gearbox, the mechanical loads acting on the gearbox need to be monitored and analysed exactly. This study was conducted to identify the characteristics of torques and bending moments acting on the main shaft of the gearbox using the rainflow counting method and predict the fatigue life of the main shaft by using the modified Miner's rule. While the mean wind speed became 3.5 m/s, the life of the main shaft by the acting torques was predicted as 4.3${\times}10^6$ years, and it by the bending moments was as 2.3${\times}10^4$ years. If the life of the wind turbine was estimated as 20 years, the fatigue life of the main shaft was regarded as infinite. Also, it was suggested that the life of the main shaft must be predicted by not the torques but the bending moments.

• Journal of KSNVE
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• v.5 no.3
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• pp.413-421
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• 1995

Synchrotron light source building of the accelerator has stringent vibration limits since the performance of the optical devices and electronic equipments in the laboratory is strongly influenced by the vibrations of the building. In this study, vibrations of the synchrotron light source building are estimated using experimental modal analysis and force response simulation technique. Dynamic properties of the building are identified from the modal parameters and vibration responses are predicted from the force response simulation. A double anti vibration system is designed and applied to the HVAC equipments and it has been shown that the measured vibrations of the building with the double anti vibration system satisfy the vibration criteria.