Safety Assessment of Train Operation Control System Based on Pre-existing Items

Safety should be assessed when pre-existing items are used in safety-related train operation control systems as parts of system function. Firstly, the types and characteristics of the pre-existing items are analyzed, with the safety requirements and the demonstration process of the train operation control system, and the problems to be solved in the application of the pre-existing items are identified. Then the application steps and safety requirements of the pre-existing items in the system development process are analyzed, and the failure control strategy and technical requirements of the pre-existing items are suggested. Finally, the safety demonstration process of the pre-existing items is analyzed, and suggestions are put forward for safety assessment of train operation control system based on pre-existing items.