Journal of the Korean Society for Railway (한국철도학회논문집)
- Volume 10 Issue 6
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- Pages.730-734
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- 2007
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- 1738-6225(pISSN)
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- 2288-2235(eISSN)
Abstract
In this paper, we suggest the criticality of Hidden Failure with regard to the design of watch dog timer, used to detect HALT on railway signaling embedded controller, via FMEA and FTA. Hidden Failure means reliability and safety degradation of the system due to any failure occurred on elements added for fault tolerance. In this paper, therefore, we design vital watch dog timer to prevent the system from operating in low SIL conditions and assess the safety of circuit on failure occurrence to demonstrate that safety degradation problems owing to existing design are supplemented.
Keywords
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References
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