Research on Anti-drag Function Control of Urban Rail Transit Vehicle Doors
In the operation process of urban rail,if passenger's clothes,bag belt or other small items were clamped by a closed door,it may cause passengers to be dragged when vehicle moved,which brought great harm to the passenger safe-ty.By introducing the door anti-drag function,chance of the above hazards could be reduced effectively.The door anti-drag function was realized by contact detection device and door control system.The contact detection device was used to detect small items clamped by the door and feedback electrical signal to door control system,while door control system was used to distinguish this electrical signal and disconnect door safety loop,to cut out vehicle traction and avoid passenger being dragged.Methods for cutting out vehicle traction could be divided into hardware control logic and software control logic.The hardware logic only used hardware circuit to execute the control,while the software logic used door control unit soft-ware to control it.By means of fault tree analysis(FTA)method,we compared the security and reliability of these two kinds of control logic,and also organized a functional test on mock-up to compare their performance.In terms of the re-sults,the hardware logic and the software logic had almost the same performance in security and functionality,but the soft-ware logic had significant advantage in reliability,so it was suggested that selecting software logical as the optimized solution when doing door anti-drag function design,it could ensure both vehicle operation security and reliability at the same time.
rail transitdoorsanti-dragfault tree analysis(FTA)
NETL
NSTL
万方数据
维普
