Abstract
To date, the studies on the combination positioning of high-speed trains have made great progress, but the positioning accuracy of these methods is relatively low. Map-matching positioning can improve positioning accuracy, but information transmission is time-consuming. Few studies incorporate it into combination positioning. To solve the problem, this paper proposes a high-speed train positioning method based on combining a Beidou navigation system, an inertial navigation system, and an electronic map. First, the combination positioning problem is transformed into a multi-objective optimization problem, which weights the direction similarity and distance error to form a fitness function and converts the railway line and the maximum error range of each positioning system into constraints. Second, an improved differential evolution algorithm is proposed to solve this problem. By referencing the gray wolf algorithm, the differential evolution algorithm updates individuals by varying toward the direction of multiple optimal values. Then, a new combination positioning algorithm for high-speed trains is proposed. In the simulation, the increase in positioning speed and accuracy is analyzed and validated. Compared to the current algorithms, the proposed algorithm performs better. The proposed method has practical value for improving the reliability and safety of train operations.
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Acknowledgements
This work was supported by National Natural Science Foundation of China (Grant Nos. U2034211, 61903141, 61733005), Joint Opening Foundation of State Key Laboratory of Synthetical Automation for Process Industries (Grant No. 2022-KF-21-03), and Technological Innovation Guidance Program of Jiangxi Province (Grant No. 20203AEI009).
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Yang, H., Dong, SQ. & Xie, CH. High-speed train positioning based on a combination of Beidou navigation, inertial navigation and an electronic map. Sci. China Inf. Sci. 66, 172207 (2023). https://doi.org/10.1007/s11432-022-3659-2
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DOI: https://doi.org/10.1007/s11432-022-3659-2