Nowadays, the transport capacity of rail transit lines has reached saturation, so it is urgent to improve the utilization and capacity of existing lines. In another area of intelligent transportation, cars can significantly improve capacity by cooperative driving, and researchers have been inspired to propose a virtual coupling scheme. The scheme improves the capacity of the line by reducing the headway. However, the design of train control system based on virtual coupling is lack of mature standard, and the traditional safety analysis method is difficult to carry out. The system theoretic process analysis (STPA) method can build the control structure for the function and organization of the system, and then carry out the safety analysis, put forward the safety constraints, reaction to the system safety design. In this paper, the STPA method is used to construct a train control system based on virtual coupling, and some potential hazards not easily detected by traditional safety analysis methods are found. Based on this, a visual research method of the system safe state is proposed, which is helpful to show the safety constraint intuitively, and can assist the decision-making in the safety design of the system.
A Key Step to Virtual Coupling
2020-09-20
634397 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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