为提高城市轨道交通全自动运行(fully automatic operation,FAO)系统的安全性,本文从FAO系统运维的角度,提出一种基于情景融合的FAO系统危害分析技术.该技术通过场景要素识别,融合生成FAO应用场景后,综合选取等比例分配法、先验信息分配法或组合逻辑分配法,采用半定量安全完整性等级(safety integrity level,SIL)分配技术完成核心子系统功能安全指标分配,解决传统功能故障模式影响及危害性分析(failure mode,effect and criticality analysis,FMECA)对多系统功能SIL分配存在局限性的问题,为后续FAO系统线路的危害分析及SIL分配工作提供参考.
Hazard Analysis Technology Based on Scenario Fusion for Fully Automatic Operation System
In order to enhance the safety of Fully Automatic Operation(FAO)systems in urban rail transit,a hazard analysis method for FAO systems is proposed,which is based on scenario fusion from the perspective of FAO system operation and maintenance.The method initiates by identifying scenario elements and integrating them,to generate FAO application scenarios.It then comprehensively selects an allocation method of semi-quantitative SIL(Safety Integrity Level)among proportional allocation,prior information allocation,and combined logical allocation,to complete the allocation of safety targets of functions of the core subsystems.Finally,the analysis method is applied in an actual engineering project case,providing a reference for subsequent hazard analysis and SIL allocation for metro lines with FAO system.This approach also addresses the limitations of traditional FMECA(Failure Mode,Effect and Criticality Analysis)in performing SIL allocation for multi-system functions.
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