Research on the driving strategy of heavy-haul train based on improved genetic algorithm

Youneng Huang,Xianhong Meng,Shuai Bai,Huazhen Yu,Mingzhu Wang

doi:10.1177/1687814018791016

Youneng Huang, Xianhong Meng + Show 3 more

Open Access

https://doi.org/10.1177/1687814018791016

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Abstract

The driving safety of heavy-haul train is affected by the train’s traction weight, the length of train, the line profile, the line speed limit, and other factors. Generally, when the train is running on a continuously long and steep downgrade line, it needs using the circulating air braking to adjust speed. When it is braking, the brake wave is transmitted non-linearly along the direction of the train. When it is relieved, it must be ensured that there is sufficient time for the train to be inflated. Therefore, it is difficult to ensure the safe operation of the heavy-haul train. In this article, a new method of the train’s driving strategy based on improved genetic algorithm is proposed. First, a mathematical model for the operation of heavy-haul train is established with multiple parameters. Then, according to the improved genetic algorithm and the mathematical model of the heavy-haul train, the driving strategy of the chromosome of the train is studied. Finally, the driving curve which can ensure the safe running of the heavy-haul train can be obtained. By comparing the simulated driving curve with the actual one, the results show the effectiveness of the proposed method.

Highlights

During the driving process of the heavy-haul train, the train will be subjected to the joint force in the transverse, longitudinal, and vertical directions in the course of operation, and the force condition is more complicated.[1]
The safe operation control focuses on the relationship between the force and the acceleration during the train’s operation, so the longitudinal stress of the train along the track direction is mainly considered
The safe operations of heavy-haul trains are subjected to many restrictions in practical applications, and their performances are related to many complex factors, such as traction force, train’s length, speed limitations, and continuous long and steep downgrade grades

Summary

Introduction

During the driving process of the heavy-haul train, the train will be subjected to the joint force in the transverse, longitudinal, and vertical directions in the course of operation, and the force condition is more complicated.[1]. The safe operation control focuses on the relationship between the force and the acceleration during the train’s operation, so the longitudinal stress of the train along the track direction is mainly considered. The safe operations of heavy-haul trains are subjected to many restrictions in practical applications, and their performances are related to many complex factors, such as traction force, train’s length, speed limitations, and continuous long and steep downgrade grades. When the train is running in the section that the line grades change frequently, the train’s braking or traction always makes the longitudinal impulsive force of the train intensified, and the longitudinal force of each vehicle is increased. For heavy-haul trains with air braking, the vibrated longitudinal force can cause more

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Results

Conclusion