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Failure rate evaluation method for HW architecture derived from functional safety standards (ISO 19014, ISO 25119, IEC 61508)

机译：源自功能安全标准（ISO 19014，ISO 25119，IEC 61508）的硬件架构故障率评估方法

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摘要

An important issue concerning the use of safety standards in the design of a complex system is the proper evaluation of the risks. The risk is correlated to the probability of failure, then to the failure rate, and it plays a fundamental role in the safety assessment process. This paper focuses on the failure rate evaluation methods adopted by the following functional safety standards: ISO 19014, ISO 25119, and IEC 61508. All of these standards are applicable, respectively, in the earth-moving machinery, in the tractors and machinery for agriculture and forestry, and in the industrial automation fields. As proposed by the standards, the failure rate evaluation depends on the conventional parameters like Mean Time To Failure, Diagnostic Coverage level, and Hardware Categories. Nevertheless, assuming the same value of these parameters, the results obtained adopting the suggested methods from different standards are not always the same. The aim of this paper is to give an analytical approach to calculate, on a common basis, the failure rate starting from a certain set of input parameters. In addition, the approximations are analysed in order to identify the correct assumptions for the proper application of all these "not exact" values in each application field.
机译：有关在复杂系统的设计中使用安全标准的重要问题是对风险的正确评估。风险与故障概率相关，然后与故障率相关，并且在安全评估过程中起着基本作用。本文重点介绍以下功能安全标准所采用的故障率评估方法：ISO 19014，ISO 25119和IEC61508。所有这些标准分别适用于土方机械，拖拉机和农业机械。和林业以及工业自动化领域。如标准所建议，故障率评估取决于常规参数，例如平均故障时间，诊断覆盖范围和硬件类别。但是，假设这些参数的值相同，则采用建议的方法从不同的标准获得的结果并不总是相同的。本文的目的是提供一种分析方法，以从一组特定的输入参数开始，在通用基础上计算故障率。另外，分析近似值以便为在每个应用领域中正确应用所有这些“非精确”值的正确假设。

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  • 来源
    《Reliability Engineering & System Safety》 |2017年第9期|124-133|共10页
  • 作者

    De Rosa Francesco; Cesoni Raffaello; Genta Stefano; Maggiore Paolo;

  • 作者单位

    Case New Holland Ind SpA, Dept Funct Safety, Viale Nazioni 55, I-41100 Modena, Italy;

    Politecn Torino, DIMEAS, Dept Mech & Aerosp Engn, Corso Duca Abruzzi 24, I-10129 Turin, Italy;

    Teoresi SpA, Via Perugia 24, I-10152 Turin, Italy;

    Politecn Torino, DIMEAS, Dept Mech & Aerosp Engn, Corso Duca Abruzzi 24, I-10129 Turin, Italy;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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