A Safety-Oriented Dynamic Moving Block Train Control System Based on Train-to-Train Communication
Chen Qiu, Tan Chen, Shaofeng Lu, Haifeng Wang
Abstract
For modern railway transportation, dynamic moving block train control systems have been well studied to shorten train tracking intervals and increase capacity. In this article, a novel train tracking method based on train-to-train communication is developed for a dynamic moving block train control system to prevent chain collisions when lead trains experience a sudden speed loss. First, a 3D dynamic safe braking model is built to show the train control mode. Second, a multitrain information synchronization method is proposed to ensure the validity of received messages. Finally, a cooperative collision avoidance mechanism is put forward. Simulation experiments are carried out with practical line data, and the effectiveness of the method is verified by a comparative simulation study with two other benchmark case studies. The results show that the proposed approach can successfully prevent chain collisions in a three-train scenario. By ensuring the normal operation of train-to-train communication through high-frequency information exchanges, the described method is able to successfully prevent chain collisions caused by abrupt decelerations on a high-density network.