DOI QR코드

DOI QR Code

RBD와 FTA의 논리구조와 신뢰성 중요도의 고찰에 의한 시스템 비시간가동률 개선방안

Improvement Strategy of System Unavailability by Review of Logical Structure and Reliability Importance of Reliability Block Diagram (RED) and Fault Tree Analysis (FTA)

  • 투고 : 2011.07.08
  • 심사 : 2011.09.19
  • 발행 : 2011.09.30

초록

The research proposes seven elimination rules of redundant gates and blocks in Fault Tree Analysis (FTA) and Reliability Block Diagram (RBD). The computational complexity of cut sets and path sets is NP-hard. In order to reduce the complexity of Minimal Cut Set (MCS) and Minimal Path Set (MPS), the paper classifies generation algorithms. Moreover, the study develops six implementation steps which reflect structural importance (SI) and reliability importance (RI) from Reliability Centered Maintenance (RCM) that a priority of using the functional logic among components is to reduce (improve) the system unavailability (or availability). The proposed steps include efficient generation of state structure function by Rare Event Enumeration (REA). Effective use of importance measures, such as SI and ill measures, is presented based on the number and the size of MCS and MPS which is generated from the reference[5] of this paper. In addition, numerical examples are presented for practitioners to obtain the comprehensive understanding of six steps that is proposed in this research.

키워드

참고문헌

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  4. 임용택, "Fault Tree 분석기법과 감도분석에 관한 연구", 전남대학교 석사학위 논문, 1987.
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  6. 최헌, "고장수목에서 기본사상 중요도 계산을 위한 과학적 접근법", 숭실대학교 석사논문, 2009.
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  12. Lee W.S., Grosh D.L., Tillman F.A., Lie C.M., "Fault Tree Analysis, Methods and Application: A Review", IEEE Transactions on Reliability, 34(1985): 194-203.
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피인용 문헌

  1. 최소절단집합과 최소경로집합을 이용한 구조 및 신뢰성 중요도 척도의 개발 및 적용 vol.14, pp.1, 2011, https://doi.org/10.12812/ksms.2012.14.1.225