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ADS-B: Probabilistic Safety Assessment

机译：ADS-B：概率安全评估

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摘要

In the effort to quantify Automatic Dependent Surveillance Broadcast (ADS-B) system safety, the authors have identified potential ADS-B failure modes in Syd Ali et al. (2014). Based on the findings, six potential hazards of ADS-B are identified in this paper. The authors then applied the Probabilistic Safety Assessment approach which includes Fault Tree Analysis (FTA) and Importance Analysis methods to quantify the system safety. FTA is applied to measure ADS-B system availability for each identified hazard while Importance Analysis is conducted to identify the most significant failure modes that may lead to the occurrence of the hazards. In addition, risk significance and safety significance of each failure mode are also identified. The result shows that the availability for the ADS-B system as a sole surveillance means is low at 0.898 in comparison to the availability of ADS-B system as supplemental or as primary means of surveillance at 0.95 and 0.999 respectively. The latter availability values are obtained from Minimum Aviation System Performance Standards (MASPS) for Automatic Dependent Surveillance-Broadcast (DO-242A).
机译：为了量化自动相关监视广播（ADS-B）系统的安全性，作者在Syd Ali等人中确定了潜在的ADS-B故障模式。 （2014）。基于这些发现，本文确定了ADS-B的六种潜在危害。然后，作者应用了概率安全评估方法，该方法包括故障树分析（FTA）和重要性分析方法来量化系统安全性。应用FTA来衡量每种已识别危险的ADS-B系统可用性，同时进行重要性分析以识别可能导致危险发生的最重要的故障模式。此外，还确定了每种故障模式的风险重要性和安全重要性。结果表明，与作为补充或主要监视手段的ADS-B系统的可用性分别为0.95和0.999相比，作为唯一监视手段的ADS-B系统的可用性较低。后者的可用性值是从自动相关监视广播的最低航空系统性能标准（MASPS）中获得的（DO-242A）。

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