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FMECA assessment fo...
FMECA assessment for railway safety-critical systems investigating a new risk threshold method
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- Catelani, Marcantonio (author)
- Department of Information Engineering, University of Florence, via di S. Marta 3, 50139, Florence, Italy
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- Ciani, Lorenzo (author)
- Department of Information Engineering, University of Florence, via di S. Marta 3, 50139, Florence, Italy
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- Galar, Diego (author)
- Luleå tekniska universitet,Drift, underhåll och akustik,Industry and Transport Division, Tecnalia Research and Innovation, Miñano, Araba , 01510, Spain
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- Guidi, Giulia (author)
- Department of Information Engineering, University of Florence, via di S. Marta 3, 50139, Florence, Italy
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- Matucci, Serena (author)
- Department of Mathematics and Computer Science “Ulisse Dini”, University of Florence, Florence, Italy
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- Patrizi, Gabriele (author)
- Department of Information Engineering, University of Florence, via di S. Marta 3, 50139, Florence, Italy
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Department of Information Engineering, University of Florence, via di S Marta 3, 50139, Florence, Italy Drift, underhåll och akustik (creator_code:org_t)
- IEEE, 2021
- 2021
- English.
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In: IEEE Access. - : IEEE. - 2169-3536. ; 9, s. 86243-86253
- Related links:
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https://doi.org/10.1...
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Abstract
Subject headings
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- This paper develops a Failure Mode, Effects and Criticality Analysis (FMECA) for a heating, ventilation and air conditioning (HVAC) system in railway. HVAC is a safety critical system which must ensure emergency ventilation in case of fire and in case of loss of primary ventilation functions. A study of the HVAC’s critical areas is mandatory to optimize its reliability and availability and consequently to guarantee a low operation and maintenance cost. The first part of the paper describes the FMECA which is performed and reported to highlight the main criticalities of the HVAC system under analysis. Secondly, the paper deals with the problem of the evaluation of a threshold risk value, which can distinguish negligible and critical failure modes. Literature barely considers the problem of an objective risk threshold estimation. Therefore, a new analytical method based on finite difference is introduced to find a univocal risk threshold value. The method is then tested on two Risk Priority Number datasets related to the same HVAC. The threshold obtained in both cases is a good tradeoff between the risk mitigation and the cost investment for the corrective actions required to mitigate the risk level. Finally, the threshold obtained with the proposed method is compared with the methods available in literature. The comparison shows that the proposed finite difference method is a well-structured technique, with a low computational cost. Furthermore, the proposed approach provides results in line with the literature, but it completely deletes the problem of subjectivity.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Samhällsbyggnadsteknik -- Annan samhällsbyggnadsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Civil Engineering -- Other Civil Engineering (hsv//eng)
Keyword
- Failure analysis
- HVAC
- Railway safety
- Reliability
- Risk analysis
- Drift och underhållsteknik
- Operation and Maintenance
Publication and Content Type
- ref (subject category)
- art (subject category)
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