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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 semiquantitative 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 multisystem functions.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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