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RISS 인기검색어
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- 저자 : 천환규(Hwan-Kyu Chun) (검색결과 3 건)
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신뢰도 경로의 고장열거를 이용한 시스템 신뢰도 계산방법 연구
천환규(Hwan-Kyu Chun),박기준(Kee-Jun Park),이장일(Jang-Il Lee),정충민(Choong-Min Jeong),신동준(Dong-Jun Shin),서명원(Myung-Won Suh) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
Recently, System including aircraft, train, and ship is more complex and huger. Accordingly, Reliability calculation of these systems is more difficult. This paper is the study about reliability calculation algorithm of complex system that is difficult to analyze solution. If system has simple series structure or parallel structure in reliability block diagram, we can easily find analytical solution. But when system has very complex structure, we are very difficult to find analytical solution of the system. In this case, we can assess system reliability using failure enumeration method of reliability path. This research represent reliability block diagram by adjacent matrix and define reliability path. We can find any system status by failure enumeration of reliability path. As a result, we can calculate any kinds system reliability through this process. This result can be applied to RCM(Reliability Centered Maintenance) and Reliability Information Management System that requires system reliability being composed by reliability of individual part.
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한국형 무인운전 고무차륜 AGT 시스템의 유지보수를 위한 신뢰성 기반의 고장 예방정비 시스템 개발에 관한 연구
손영탁(Young-Tak Son),천환규(Hwan-Kyu Chun),엄호영(Ho-Young Uhm),이호용(Ho-Yong Lee),한석윤(Seok-Youn Han),서명원(Myung-Won Suh) Korean Society for Precision Engineering 2010 한국정밀공학회지 Vol.27 No.5
The Korean Railroad Research Institute (KRRI) has developed the rubber tired AGT system (Model: K-AGT) between 1999 and 2005. The K-AGT is a light rail transit system does not require a driver and generally operates on an elevated railroad for transporting passengers. Accidents caused by driverless vehicles can severely affect social confidence, safety and economy therefore, it is very important to minimize the occurrences of such faults, and to accurately perform detailed maintenance tasks and thoroughly investigate the cause of any repeated failures. This research develops the web-based Preventive Maintenance (PM) system for the KAGT train system. The framework of the PM system is based on performing a reliability analysis and a failure mode effects analyses (FMEA) procedure on all the sub-systems in the K-AGT system. Out of the devices that have a low reliability, the high failure ranked devices are included high in the list for performing the overall maintenance plans. Through registration of historical failure data, the reliability indexes can be updated. Such a process is repeated continuously and can achieve very accurate predictions for device operational life times and failure rates. Therefore, this research describes the development of the overall PM system consists of a reliability analysis module, a failure mode effect analysis module, and maintenance request module.
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신뢰도 경로의 고장열거를 이용한 시스템 신뢰도 계산방법 연구
이장일(Jang-Il Lee),박기준(Kee-Jun Park),천환규(Hwan-Kyu Chun),정충민(Choong-Min Jeong),신동준(Dong-Jun Shin),서명원(Myung-Won Suh) 대한기계학회 2011 大韓機械學會論文集A Vol.35 No.6
항공기, 철도, 선박과 같은 대형 시스템들은 전기, 기계적으로 매우 복잡한 구조를 가졌으며 부품의 수명만을 고려한 기존의 유지보수에서 탈피하여, 고장분석의 시스템화를 통해 장치의 고유수명과는 관계없이 발생 가능한 우발고장도 대처할 수 있는 신뢰성 기반의 유지보수체계를 연구하여야 한다. 본 연구에서는 선행연구로 필요한 복합 시스템의 신뢰도 계산방법에 관한 연구이다. 복합 시스템의 신뢰도를 효과적으로 계산하기 위해 시스템의 RBD(Reliability Block Diagram)를 구성하고 인접행렬을 사용하여 RBD(Reliability Block Diagram)를 행렬로 표현한다. 또한 RBD(Reliability Block Diagram)행렬을 통하여 신뢰도 경로행렬과 고장열거 행렬을 구성하여 시스템의 신뢰도를 계산한다. 본 연구에서 제안한 알고리즘은 자동화, 시스템화가 가능하며 현재 개발하고 있는 신뢰도 정보관리 시스템 및 신뢰성 기반 유지보수 시스템에서 활용될 것이다. Recently, systems such as aircraft, trains and ships have become larger more complex. Therefore, the reliability calculation of these systems is more difficult. This paper presents a reliability calculation algorithm for a complex system with a solution that is difficult to analyze. When the system has a very complex structure, it is very difficult to find an analytical solution. In this case, we can assess system reliability using the failure enumeration method of the reliability path. In this research, we represent the reliability block diagram by an adjacent matrix and define the reliability path. We can find any system status by the failure enumeration of the reliability path, and thus we can calculate any kind of system reliability through this process. This result can be applied to RCM (Reliability-Centered Maintenance) and reliability information-management systems, in which the system reliability is composed of the reliabilities of individual parts.
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