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Determining and verifying the safety integrity level of the controland protection systems under uncertainty
Abstract
The probabilistic models of the electrical, electronic and programmable electronic (E/E/PE)systems, which are proposed in the IEC 61508 and IEC 61511 standards, do not cover the uncertainty aspectsof results obtained from these models. The proposed method takes into consideration the sensitivity analysisof probabilistic models of E/E/PE systems as well as the uncertainty of probabilistic results. It uses differentialfactors, which are helpful for effective verification of required safety integrity level (SIL) of the E/E/PE systemstaking into account results of sensitivity analysis and/or assessment of uncertainty ranges obtained fromprobabilistic models developed. The uncertainty ranges of the probabilistic and risk measures for E/E/PE safetyrelatedsystems can be represented as intervals, in general fuzzy intervals, which are compared with the intervalprobabilistic criteria defined in the IEC 61508 standard, for four distinguished SILs. The determination andverification of SILs of the E/E/PE systems is performed using a prototype MySQL knowledge-based system.
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- Category:
- Conference activity
- Type:
- publikacja w wydawnictwie zbiorowym recenzowanym (także w materiałach konferencyjnych)
- Title of issue:
- Safety, reliability and risk analysis : theory, methods and applications : proceedings of the European Safety and Reliability Conference, ESREL 2008, and 17th SRA-Europe, Valencia, Spain, September, 22-25, 2008. Vol. 1 strony 0 - 0
- Language:
- English
- Publication year:
- 2008
- Bibliographic description:
- Kosmowski K., Barnert T., Śliwiński M.: Determining and verifying the safety integrity level of the controland protection systems under uncertainty// Safety, reliability and risk analysis : theory, methods and applications : proceedings of the European Safety and Reliability Conference, ESREL 2008, and 17th SRA-Europe, Valencia, Spain, September, 22-25, 2008. Vol. 1/ ed. S. Martorell, C. Guedes Soares & J. Barnett Leiden, The Netherlands: CRC Press/Balkema, 2008, s.0-0
- Verified by:
- Gdańsk University of Technology
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