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Research paper | Open Access

High-speed train cooperative control based on fractional-order sliding mode adaptive algorithm

Junting Lin1, Mingjun Ni1, Huadian Liang2( )
School of Automation and Electrical Engineering, Lanzhou Jiaotong University, Lanzhou, China
Electrical R&D Department, CRRC Nanjing Puzhen Co., Ltd, Nanjing, China
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Abstract

Purpose

This study aims to propose an adaptive fractional-order sliding mode controller to solve the problem of train speed tracking control and position interval control under disturbance environment in moving block system, so as to improve the tracking efficiency and collision avoidance performance.

Design/methodology/approach

The mathematical model of information interaction between trains is established based on algebraic graph theory, so that the train can obtain the state information of adjacent trains, and then realize the distributed cooperative control of each train. In the controller design, the sliding mode control and fractional calculus are combined to avoid the discontinuous switching phenomenon, so as to suppress the chattering of sliding mode control, and a parameter adaptive law is constructed to approximate the time-varying operating resistance coefficient.

Findings

The simulation results show that compared with proportional integral derivative (PID) control and ordinary sliding mode control, the control accuracy of the proposed algorithm in terms of speed is, respectively, improved by 25% and 75%. The error frequency and fluctuation range of the proposed algorithm are reduced in the position error control, the error value tends to 0, and the operation trend tends to be consistent. Therefore, the control method can improve the control accuracy of the system and prove that it has strong immunity.

Originality/value

The algorithm can reduce the influence of external interference in the actual operating environment, realize efficient and stable tracking of trains, and ensure the safety of train control.

Keywords

High-speed trainsSliding mode controlFractional-order differentiationAdaptive lawCooperative control

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Railway Sciences
Volume 2 Issue 1,
April 2023
Pages 84-100
DOI: 10.1108/RS-05-2022-0022
Cite this article:
Lin J, Ni M, Liang H. High-speed train cooperative control based on fractional-order sliding mode adaptive algorithm. Railway Sciences, 2023, 2(1): 84-100. https://doi.org/10.1108/RS-05-2022-0022

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Received: 31 May 2022
Revised: 11 December 2022
Accepted: 04 January 2023
Published: 10 February 2023
© Junting Lin, Mingjun Ni and Huadian Liang. Published in Railway Sciences.

This article is published under the Creative Commons Attribution (CC BY 4.0) licence. Anyone may reproduce, distribute, translate and create derivative works of this article (for both commercial and non-commercial purposes), subject to full attribution to the original publication and authors. The full terms of this licence may be seen at http://creativecommons.org/licences/by/4.0/legalcode
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