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故障模式、影响和危害性分析 (FMECA)

1980
  • United States Military
Military engineer analyzing FMECA chart in 1980s workspace for reliability assessment.

(图片仅供参考)

FMECA is an extension of 失效模式及影响分析 that includes a criticality analysis, which charts the probability of failure modes against the severity of their consequences. This allows for a quantitative ranking of failure modes based on the combined influence of their severity and probability. The result highlights single points of failure and helps prioritize corrective actions based on a more rigorous risk level.

FMECA enhances the qualitative aspects of 失效模式及影响分析 by introducing a quantitative criticality assessment, as defined in standards like MIL-STD-1629A. Criticality is typically calculated in two ways: modal criticality and item criticality. Modal criticality is calculated for each failure mode and can be expressed as [latex]C_m = lambda_p alpha beta K_e[/latex], where [latex]lambda_p[/latex] is the part failure rate, [latex]alpha[/latex] is the failure mode ratio (the fraction of part failures attributable to this mode), [latex]beta[/latex] is the conditional probability that the failure effect will result, and [latex]K_e[/latex] is the severity factor. Item criticality is then the sum of the modal criticalities for all failure modes of a particular item.

这种定量方法在航空航天、国防和核电等高风险行业尤其有价值,因为这些行业需要比标准 RPN 更精细、更可靠的方法。其输出通常是一个关键性矩阵,该矩阵将严重程度类别与发生概率水平进行了对比。该矩阵清晰地直观地显示了最高风险项目,使工程师和管理人员能够集中资源来缓解最关键的潜在故障,尤其是那些可能导致灾难性系统损失或人员伤亡的故障。

UNESCO Nomenclature: 3313
– Systems design

类型

抽象系统

中断

重大的

用法

Niche/Specialized

前体

  • 故障模式和影响分析(FMEA)
  • fault tree analysis (fta)
  • probabilistic 风险评估 (pra)
  • 可靠性框图

应用程序

  • 航空航天系统安全分析
  • 核电站风险评估
  • 军事硬件可靠性
  • 海上油气平台安全
  • medical infusion 泵 设计

专利:

NA

潜在创新理念

  • 自动驾驶汽车决策算法的fmeca
  • predictive fmeca using 数字孪生 模拟
  • fmeca for assessing 网络安全 vulnerabilities in critical infrastructure
  • 将人为因素纳入fmeca关键性计算
  • 用于评估金融交易算法弹性的fmeca
  • 从 CAD/CAM 模型自动生成 FMECA
  • 基因编辑(Crispr)程序风险的fmeca
  • 使用 fmeca 进行量子计算硬件故障分析
  • 空间碎片碰撞风险评估的fmeca
  • FMECA 应用于全球疫情应对策略
Related to: FMECA, FMEA, criticality analysis, risk assessment, reliability engineering, safety engineering, MIL-std-1629a, quantitative risk, single point of failure, aerospace.

历史背景

故障模式、影响和危害性分析 (FMECA)

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(如果日期未知或不相关,例如“流体力学”,则提供其显著出现的近似估计)

第十年 周年纪念日

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