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논문 기본 정보

자료유형
학술대회자료
저자정보
한풍규 (현대케피코)
저널정보
한국자동차공학회 한국자동차공학회 추계학술대회 및 전시회 2024년 한국자동차공학회 추계학술대회 및 전시회
발행연도
2024.11
수록면
2,054 - 2,064 (11page)

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초록· 키워드

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ISO 26262, a functional safety standard for E/E systems, requires that safety mechanisms be designed for the purpose of risk analysis of software and prevention and action against risks to ensure the safety of vehicles. Among the safety analysis methodologies for designing safety mechanisms in software, software FMEA has the limitation that it is limited to single-point faults, and DFA is performed separately for safety analysis of multi-point faults such as dependent failures. In this study, we propose to integrate software FMEA with software architecting by adding signal analysis to the current AIAG-VDA's seven-step software FMEA process, and to perform software FMEA in conjunction with DFA and verification test case establishment using signal information defined in software architecting as parameters. In the integrated software FMEA, the signal analysis performed at the SW component level can be expressed in the form of dynamic behavior of the SW architecture design and can be used as a DFA result for cascading failure. In addition, by synthesizing the signal analysis results of the integrated software FMEA according to the structure tree and grouping them by interfering signals (i.e., variables), it is possible to derive the target elements for common cause failure. Based on this, DFA no longer relies on the developer's experience, but can be systematically performed through functional analysis and failure analysis based on the newly added signal analysis in SW FMEA. In addition, by utilizing the newly presented signal information in the integrated software FMEA, the optimization plan can be specifically established based on the variables that implement the function, and it is easy to link it to the creation of test cases for each verification test, thus expanding the effectiveness and efficiency of software FMEA.

목차

Abstract
1. Introduction
2. Integration of software architecture design into SW FMEA
3. Definition for DFA
4. Scalability of the integrated SW FMEA into DFA
5. Conclusion
References

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