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서병석(Byungseok Seo),이동익(Dongik Lee) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
This paper presents the fault detection and isolation strategy for electric vehicle(EV). Unlike the conventional internal combustion engine vehicle, electric vehicle is consist of electric motor, inverter, battery-management system(BMS), etc. For this reason, electric vehicle has a new failure modes. Vehicle system is a safety-critical system. There are high demands on safety. In this paper, we analysis of electric vehicle failure mode using Fault Tree Analysis(FTA) method. The result of Motor/inverter and battery system fault tree analysis are shown in conclusion.
전태보,권창섭 강원대학교 산업기술연구소 2006 産業技術硏究 Vol.26 No.B
High level of reliability in facility operation is specifically required these days. The goal of this study is to secure a methodology for reliability analysis of hydro-power plant so that an appropriate decision for operation and investment can be made. Fault tree analysis of water supply system within hydro-power plant has been performed in this study. We briefly examined the electric power generation facility and water supply system. We then developed fault tree for the water supply system based on failure modes and effects analysis. We conclude this study and provided future research areas.
권창섭(Kwon Chang Seob),전태보(Jeon Tae Bo) 강원대학교 산업기술연구소 2006 産業技術硏究 Vol.26 No.1
The significance of hydro-power plant is increasing in its public roles such as flood control and water supply as well as electric power production. Even if high level of reliability in facility operation is required, no specific reliability research has been made. This specifically stems from the lack of technology and research investments. The eventual goal of this study is to secure a methodology for reliability analysis of hydro-power plant so that an appropriate decision for operation and investment can be made. Specific effort was put to develop a reliability model for water supply system within hydro-power plant. For this study, we briefly examined the overview of the hydroUpower plant including the electric power generation facility system. We then discussed the facility reliability analysis methodology for hydro-power plant. Based on rigorous examination of the water supply system and components roles, we drew major failure modes for each component and examined their effects.
LED(Light Emitting Diode)의 가속수명시험
김병남(Beoung-Nam Kim),김재중(Jae-Jung Kim),장석원(Seog-Weon Chang),신승중(Seung-Jung Shin),곽계달(Kae-Dal Kwack) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
This study has explained about LED which is widely used in the kinds of display devices or circuits. It was shown that the short due to corrosion and open due to wire fracture were the dominant LED failure mode/mechanisms from failure analysis of field samples. So, we have defined failure as 100% reduction of light output intensity of LED and acceleration factors as temperature and humidity in ALT. Finally, we have estimated the common shape parameter of Weibull distribution, life-stress relationship, and accelerating factor by ALTA(Software).
권창섭,전태보 강원대학교 산업기술연구소 2006 産業技術硏究 Vol.26 No.B
The significance of hydro-power plant is increasing in its public roles such as flood control and water supply as well as electric power production. Even if high level of reliability in facility operation is required, no specific reliability research has been made. This specifically stems from the lack of technology and research investments. The eventual goal of this study is to secure a methodology for reliability analysis of hydro-power plant so that an appropriate decision for operation and investment can be made. Specific effort was put to develop a reliability model for water supply system within hydro-power plant. For this study, we briefly examined the overview of the hydroUpower plant including the electric power generation facility system. We then discussed the facility reliability analysis methodology for hydro-power plant. Based on rigorous examination of the water supply system and components roles, we drew major failure modes for each component and examined their effects.
ISO 26262의 RBD, FTA를 이용한 E/E/PE의 안전성분석 및 중요도분석
백재진(Jaejin Baek),이광원(Kwangwon Rhie) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
ISO 26262 for development and produce of Safety-related electrical and electronics product in the automotive industry standards is underway. The standard supporting whole develop-phase of E/E/PE is getting important in automotive industry because E/E/PE can prevent accidents or minimize the accidents. This paper introduces to analysis the safety using RBD and FTA. Finally, the importance of reliability are analyzed using the Reliability importance such as Birnbaum’ and Structural importance.
헬기용 와이퍼 조립체의 가속모델 및 가속수명시험 설계 연구
김대유,허장욱,전부일 한국군사과학기술학회 2018 한국군사과학기술학회지 Vol.21 No.6
In the case of helicopters, the development of parts technology is rapidly changing, and the complexity is rapidly increasing. Particularly, the surge of various electric and electronic systems is recognized as a problem that is directly related to the safety of the helicopter. Due to these problems, there is a growing interest in reliability evaluation in the face of the problem of confirming and certifying the reliability of parts in the development stage. In this paper, the analysis of the failure mechanism of the wiper system was carried out, and the priority and importance of each failure mode were checked by using the results, and major stress factors were derived and the corresponding acceleration model was selected. Also, the accelerated lifetime test time was calculated according to the life test time, acceleration status and acceleration level of the steady state by using the selected acceleration model and characteristic values.