| Presentation | 2003/12/12 Validity of Stochastic Models for Estimation of Hazardous Event Frequency Tsuneharu SHIMODAIRA, Yoshinobu SATO, Koichi SUYAMA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In the international standard of functional safety, IEC 61508, Safety-Related System (SRS) is specified by the Safety Integrity Level (SIL). In order to allocate SIL to SRS, it is necessary to estimate the frequencies of hazardous events which arise in the overall system both with and without the SRS. Kato et al. presented a SIL model based on the theory of average fault-detection interval. This model provides us how to estimate comprehensively the hazardous event frequency, given fault is recovered at a proof test (PT) only. The present paper formulates the hazardous event frequency based on the stochastic model of state-transition diagram by use of the mean down time of SRS. Moreover, Monte-Carlo simulation is studied to analyze the hazardous event frequencies of the system where PTs are performed periodically. Finally, the stochastic model is validated by comparing the results through numerical analyses using both the model and simulation. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | IEC 61508 / safety-related system / self-diagnosis / safety-integrity level / state-transition model |
| Paper # | R2003-50,SSS2003-25(2003-12) |
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| Conference Information | |
| Committee | SSS |
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| Conference Date | 2003/12/12(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Safety (SSS) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Validity of Stochastic Models for Estimation of Hazardous Event Frequency |
| Sub Title (in English) | |
| Keyword(1) | IEC 61508 |
| Keyword(2) | safety-related system |
| Keyword(3) | self-diagnosis |
| Keyword(4) | safety-integrity level |
| Keyword(5) | state-transition model |
| 1st Author's Name | Tsuneharu SHIMODAIRA |
| 1st Author's Affiliation | Division of Marine Information System Engineering, Tokyo University of Marine Science and Technology() |
| 2nd Author's Name | Yoshinobu SATO |
| 2nd Author's Affiliation | Division of Marine Information System Engineering, Tokyo University of Marine Science and Technology |
| 3rd Author's Name | Koichi SUYAMA |
| 3rd Author's Affiliation | Division of Marine Information System Engineering, Tokyo University of Marine Science and Technology |
| Date | 2003/12/12 |
| Paper # | R2003-50,SSS2003-25(2003-12) |
| Volume (vol) | vol.103 |
| Number (no) | 530 |
| Page | pp.pp.- |
| #Pages | 4 |
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