Journal of the Korea Safety Management & Science (대한안전경영과학회지)

Korea Safety Management & Science (대한안전경영과학회)
권호 표지
DOI QR코드

DOI QR Code

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

RBD와 FTA의 논리구조와 신뢰성 중요도의 고찰에 의한 시스템 비시간가동률 개선방안

  • Received : 2011.07.08
  • Accepted : 2011.09.19
  • Published : 2011.09.30
Download PDF
⟨ Previous Next ⟩

Abstract

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.

Keywords

References

  1. 구훈영, "결합중요도를 이용한 사후보수 우선순위 결정", 대한산업공학회지, 33(1) (2007): 61-69.
  2. 양영순, "Fault Tree 방법을 이용한 시스템의 안전사고 해석", 한국항공우주학회지, 17(2)(1989): 46-53.
  3. 이해상외, "고장나무의 비관련 사상들에 대한 축소 방법", 대한산업공학회지, 22(1)(1996): 129-139.
  4. 임용택, "Fault Tree 분석기법과 감도분석에 관한 연구", 전남대학교 석사학위 논문, 1987.
  5. 최성운, 최소절단집한과 최소경로집합을 이용한 구조 및 신뢰성 중요도 척도의 개발 및 적용, In Press.
  6. 최헌, "고장수목에서 기본사상 중요도 계산을 위한 과학적 접근법", 숭실대학교 석사논문, 2009.
  7. Barlow R.E., Proschan F., Statistical Theory of Reliability and Life Testing: Probability Models, Rinehart and Winston, 1975.
  8. Brown K.S., "Evaluating Fault Trees(And & OR gates only) with Repeated Events", IEEE Transactions on Reliability, 39(1990): 226-235. https://doi.org/10.1109/24.55886
  9. Hennings W., "FAMOCUTN & CUTQN: Programs for Fast Analysis of Large Fault Trees with Replicated & Negated Gates", IEEE Transactions on Reliability, 44(3)(1995): 368-376. https://doi.org/10.1109/24.406566
  10. Jerome C., "Some Remarks on Rare-Event Approximation", IEEE Transactions on Reliability, 45(1)(1996): 106-108. https://doi.org/10.1109/24.488924
  11. Kohda T., Henley E.J., Inoue K., "Finding Modules in Fault Trees", IEEE Transaction on Reliability, 38(1989): 165-176. https://doi.org/10.1109/24.31101
  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.
  13. McComrick N.J., Reliability and Risk Analysis: Methods and Nuclear Power Applications, Academic Press, 1981.
  14. Wilson, J.M., "Modularizing and Minimizing Fault Trees", IEEE Transactions on Reliability, 34(1985):320-322.
  15. Yang J., Han S., Park J., Jin Y., "Analytic Method to Break Logical Loops Automatically in PSA", Reliability Engineering and System Safety, 56(1997): 101-105. https://doi.org/10.1016/S0951-8320(96)00142-1

Cited by

  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