Feild Test of Distributed Digital ATC for Its Performance
Ikuo WATANABE, Mitsuyoshi FUKUDA, Tetsuo TAKASHIGE
We have been developing a new automatic train control system (Digital ATC). Such messages as the
distance between a train and the preceding one, the track circuit identifying number, ect., are
transmitted to each train from the wayside. These are done through the rails using digital codes.
An on-board processor generates a braking pattern and safe speed to run is calculated with the
information from the wayside and data stored on-board as locations of track circuits, gradients,
curves, turnouts, and limit speeds on these sections as weel as braking performance. If the speeds
exceeds the calculated value, the brake is applied. As this system controls the train speed in one
step braking from full speed to stop, it can shorten the train headway. In this paper, we describe
the concept of Digital ACT. Next we describe the trial production of the wayside equipment and
on-board equipment and the results of their performance tests. Lastly we describe the result of
testing the S/N characteristic of MSK.