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Sensitivity assessment to analyse dependability of a multisensor localisation system based on GNSS

机译：基于GNSS的多传感器定位系统可靠性评估的敏感性评估

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This paper proposes to use sensibility measures to analyse the dependability and safety of railway localisation systems based on GNSS. In such systems, train positions are determined by combining all available sources of localisation information. However, each source of data suffers from specific errors, which are inherent to the nature of the sensors and, which are difficult to manage with common dependability methods. The proposed evaluation method based on a sensitivity analysis aims at showing the influence of the variability of sensor parameters on the RAMS (Reliability, Availability, Maintainability and Safety) attributes. This implies (i) to identify characteristics of the different sensors that compose the system like features, behaviour and error model, and (ii) to make assumptions about the nature of position error on the output system (continuity, differentiability, etc…). This paper proposes a sensitivity computation method and interpretations related to a train positioning system. This can constitute a new approach in dependability analysis in GNSS-based systems with a low or nonexistent feedback.
机译：本文提出使用敏感性措施来分析基于GNSS的铁路定位系统的可靠性和安全性。在这样的系统中，通过组合所有可用的本地化信息源来确定火车位置。但是，每个数据源都存在特定的错误，这些错误是传感器本质所固有的，并且很难用常见的可靠性方法进行管理。所提出的基于灵敏度分析的评估方法旨在显示传感器参数的可变性对RAMS（可靠性，可用性，可维护性和安全性）属性的影响。这意味着（i）识别组成系统的不同传感器的特征，如特征，行为和误差模型，以及（ii）对输出系统上位置误差的性质（连续性，微分性等）进行假设。本文提出了一种与列车定位系统有关的灵敏度计算方法和解释。这可以构成反馈少或不存在的基于GNSS的系统中可靠性分析的新方法。

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