WANG Juhan, GAO Ying, CAO Yuan, TANG Tao, ZHOU Mingjun. The FMEDA Based DC Calculation for Railway Safety Computer[J]. Chinese Journal of Electronics, 2020, 29(2): 391-396. doi: 10.1049/cje.2020.02.004
Citation: WANG Juhan, GAO Ying, CAO Yuan, TANG Tao, ZHOU Mingjun. The FMEDA Based DC Calculation for Railway Safety Computer[J]. Chinese Journal of Electronics, 2020, 29(2): 391-396. doi: 10.1049/cje.2020.02.004

The FMEDA Based DC Calculation for Railway Safety Computer

doi: 10.1049/cje.2020.02.004
Funds:  This work is supported by the High-speed Rail Joint Fund (No.U1734211, No.U1534208).
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  • Corresponding author: CAO Yuan (corresponding author) received the B.S degree in electric engineering and automation from Dalian Jiaotong University and Ph.D. degree in traffic information engineering and control from Beijing Jiaotong University in 2004 and 2011 respectively. And now he is an associate professor of Beijing Jiaotong University. Since 2006, he has participated in many engineering practice, especially in the signal and communication system of high-speed railway. He has taken part in several key national research projects in the field of high-speed train communications. His research interest focuses on the possibility and suitability of new wireless communications in high-speed train systems. (
  • Received Date: 2018-08-20
  • Rev Recd Date: 2018-12-05
  • Publish Date: 2020-03-10
  • This paper presents a new algorithm to compute the Diagnostic coverage (DC) for railway safety computer using the Failure modes effects and diagnostic analysis (FMEDA) theory. The importance to work out the DC accurately is stressed. A certain type of railway safety computer's output element is taken as an example to show how the DC is worked out using the FMEDA method. The probability of dangerous failures per hour (PFH) of one certain safety computer is obtained considering the DC. The final results show that the DC is 99.6% and the PFH of the safety is 1.165 fit, which means 1.165 dangerous failures may occur during 1 billion hours' working time, running up to the requirement of the Safety integrity level 4 (SIL4). This paper provides an example to come up with the DC for safety computer, thus making the PFH calculation more accurate and so is the Safety integrity level.
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