Abstract
The Tokaido Shinkansen will introduce a new ATC train control system which will enables more comfortable "continuous" brake control from existing system's "multistep" brake control. Compared from the existing system which receives allowable speed signal from the ground, this new system, with its main constituent of the control shifted to the device on the train, computes a necessary brake beginning point from the distance between the train itself and the train preceding. To secure high reliability, all devices on the ground and on the train are made of dual redundant composition. The devices on the train are also functionally redundant by adopting two sets of control unit. One is the operation control unit that chooses optimal brake notch. The other is security control unit that does the simple control only for the emergency braking. Each unit is working by different program. By realizing redundant composition at both the hardware and the software, we have attempted to improve its security level. This paper presents an outline of the Tokaido Shinkansen's new ATC system and its development status.
