Optimal Design of Metro Vehicle Control Circuit Based on Redundant Switching of On-board ATC Control System

When the main on-board ATC controller and standby on-board ATC controller of the dual terminal redundant signaling system are switched, all output signals to vehicles will be interrupted. The analysis of the running state and risk of vehicle after the loss of zero speed signal, emergency braking signal and traction braking control signal in the process of signaling system redundant switching is carried out. Vehicle circuit is optimized to realize signaling system seamless switch-ing, ensuring availability and stability of signal redundancy switching, which further improves train operation efficiency and service quality.