Risk Analysis Technology of Fully Automatic Operation System
To ensure the safe operation of a fully automatic operation(FAO)system in urban rail transit,a technical method for safety risk analysis at the overall system level of the FAO system is proposed.The method can comprehensively identify the risks of the FAO system design.This method first compares the differences with the IEC 62267 standard to determine the preliminary risk list and then conducts risk scenario fusion of the four types of scenario elements to analyze each specific concrete hazard scenario.Based on this,a semiquantitative SIL allocation technique is used to assign quantitative safety indices to each subsystem to quantify its safety requirements.Considering the complexity of the interaction between the scene subsystems of the FAO system,the system-theoretic process analysis(STPA)method is used to analyze the hazards of the operation scene.This method proposes the corresponding functional,technical,and operational safety requirements for each core subsystem,equipment,interface,O&M,and construction of the FAO system.This provides a reference value for subsequent engineering projects to conduct risk analysis at the overall FAO system level.
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维普
