Accuracy Improvement of Braking Distance by Deceleration Feedback Function Applying to Brake System

Abstract

Brake control systems used in current railways are generally open-loop structures. Braking performance can be affected by problems such as wheel slipping or the characteristics of friction components included in brake equipment. In order to automatically stabilize braking performance, we propose a new closed-loop system which can make train deceleration follow a set of target values which change with braking distance. We carried out running tests using rolling stock equipped with the proposed method. The results of the test showed that the method can contribute to reducing an increase in braking distance when there is temporary degradation in the brake.