Research on virtual coupling railway safety protection based on track prediction

Abstract

Virtual Coupling railway technology allows trains to conduct dynamic formation and reconciliation according to the actual passenger transport needs. The trains within the formation operate at small intervals close to the length of mechanical hooks, realizing local ultra-high density driving and collaborative control. In order to ensure that the train can also operate safely when the location and speed information is missing, this paper proposes to predict the train track and perceive the future train operation state in advance to realize the safe operation. Firstly, the existing urban rail train braking model is analyzed, and the highly accurate train braking model is identified by the improved Particle Swarm (PSO) algorithm; then after analyzing Long Short-Term Memory (LSTM) and Unscented Kalman Filter (UKF) respectively, the Virtual Coupling train track prediction algorithm based on LSTM and UKF is proposed. Finally, the actual operation data construction environment, simulation prediction and verification. The simulation experiment results show that: compared with the simple LSTM trajectory prediction, the formation train trajectory prediction model based on LSTM-UKF can further reduce the prediction error and instability, which is conducive to the safe operation of the virtual formation train.

Robust Artificial Intelligence-Aided Multimodal Rail-Obstacle Detection Method by Rail Track Topology Reconstruction

“…The transformation relationship between the camera coordinate system and the rail coordinate system is shown in Equation (1), where c Z is the depth of the object point to the image plane, K is the camera intrinsic parameters, and _ r c…”

“…Accidents due to the intrusion of foreign objects, such as falling stones into the railway line, often occur during railway transport, seriously endangering the safety of locomotive operation and thus causing serious negative effects [1,2]. Therefore, it is essential to monitor and prevent the obstacles of foreign objects in railway track areas.…”

Virtual Coupling in Railways: A Comprehensive Review

“…References [126,127] developed optimal operation control strategies for virtually coupled trains at junctions, formulating a cooperative game-based model for the coupling maneuver as an optimization problem that is solved via an improved particle swarm optimization (PSO) algorithm. Furthermore, reference [128] proposed an alternative PSO algorithm for predicting the train track and future train operation state to fulfill safe operation. The developed VC train-track prediction algorithm is based on long short-term memory (LSTM) and an unscented Kalman filter.…”