Simulation of the Train's Speed-Control Curve for the Onboard ATP

摘要

As the base of automatic train control (ATC) system of urban railway transit, Automatic Train Protection (ATP) system plays an important role in interval control, proceeding control and overspeed protection. The onboard ATP, however, is the key component of ATP system to insure the train's security. It calculates the train's speed-control curve based on the railway's information stored in the host computer and the data received from rail. Furthermore, it constantly compares the permitted velocity calculated with the train's actual velocity to supervise the train's running. Thus it can carry out functions including overspeed protection, zero-speed check, unconscious moving protection, brake confirmation, door protection and so on. This paper introduces the simulation of ATP system. Furthermore, it describes the method of calculating speed-control curve in details. In the end, it simulates the speed-control curve and achieves function of overspeed protection with parameters of No. 1 annular route of Beijing subway as an example. The whole simulation system has been bringing into service and it has shown good effects.