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Study on Operative Reliability of Safety-Related Control Systems

  • Takabumi Fukuda
  • Kunihiro Kuroi
  • Go Fukuda
  • Hisaji Shimizu
Conference paper

Abstract

This paper concerns the function of safety devices for machines and their validation according to the standards. The purpose of this study is to understand core concepts included in them through a case-study. In this paper, 3 typical circuits for safeguards are focused and their safety functions are analyzed by ETA and importance index. Through this study, following points are shown: (1) importance of failure detection especially in Category 4, and (2) ranking of components by importance index. Adding to these, the difference in behaviour of safety-relay under certain failure condition is reported.

Keywords

Failure Condition Failure Detection Operative Reliability Single Fault Safety Device 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1).
    ISO CD 12100 Safety of Machinery — Basic Concept, General Principle for Design, 1998Google Scholar
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    ISO 13849-1 Safety of Machinery — Safety-Related Parts of Control Systems — Part 1. General Principles for Design, 1999Google Scholar
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    ISO 14121 Safety of Machinery-Principle of Risk Assessment, 1999Google Scholar
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    Kleinbreuer, W., Kreutzkampf, F., Meffert, K., and Reinert, D., Categories for Safety-Related Control Systems in Accordance With EN 954-1, HVBG(BIA Report 6/ 97e), 1999;60-61, 82-83, 126-127Google Scholar
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    EN 50205 Relays with Forcibly Guided (Mechanically Linked) Contacts, 2002Google Scholar
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    IEEE Std 500 IEEE Guide to the Collection and Presentation of Electrical, Electronic, Sensing Component, and Mechanical Equipment Reliability Data for Nuclear-power Generating Station, IEEE, 1984; 150, 214-216Google Scholar
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    Henley, E. J. and Kumamoto, H., Probabilistic Risk Assessment, Institute of Electrical and Electronics Engineers, Inc., 1992, 426-428Google Scholar

Copyright information

© Springer-Verlag London 2004

Authors and Affiliations

  • Takabumi Fukuda
    • 1
  • Kunihiro Kuroi
    • 1
  • Go Fukuda
    • 1
  • Hisaji Shimizu
    • 1
  1. 1.Department of Energy & Safety EngineeringGraduate School of Yokohama National UniversityHodogaya-ku, YokohamaJapan

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