TY - JOUR
T1 - A New Train Integrity Resolution Method Based on Online Carrier Phase Relative Positioning
AU - Jiang, Wei
AU - Liu, Yongqiang
AU - Cai, Baigen
AU - Rizos, Chris
AU - Wang, Jian
AU - Jiang, Yiping
N1 - Funding Information:
Manuscript received January 14, 2020; revised June 8, 2020 and July 3, 2020; accepted July 13, 2020. Date of publication July 20, 2020; date of current version October 22, 2020. This work was supported in part by the National Natural Science Foundation of China under Grants 6173034 and U1934222, and in part by the Science and Technology Research and Development Plan of Qinghai Tibet Railway Company under Grant QZ2017-X12. The review of this article was coordinated by Dr. Amitava Chatterjee. (Corresponding author: Wei Jiang.) Wei Jiang, Baigen Cai, and Jian Wang are with the State Key Laboratory of Rail Traffic Control and Safety and the Beijing Engineering Research Center of EMC and GNSS Technology for Rail Transportation, School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, China (e-mail: weijiang@bjtu.edu.cn; bgcai@bjtu.edu.cn; wangj@bjtu.edu.cn).
Publisher Copyright:
© 1967-2012 IEEE.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/10
Y1 - 2020/10
N2 - Train integrity resolution is an important part of a train operation control system. In current train operation control systems, train integrity resolution is achieved by using information on the track circuit or the wind pressure. However, both approaches have limitations; the utilization of the track circuits requires high construction and maintenance costs, and the wind pressure approach has to overcome the problem of low update rate and false alarm caused by the incident pipe leakage. In this paper a new train integrity resolution method based on double-differenced carrier phase relative positioning is proposed. To improve the system performance, an online integer ambiguity fixing method is applied to overcome the frequent integer ambiguity re-fixing problem caused by the high train speed and the complex operational environment. Moreover, the elevation angle constraint optimal distribution based reference satellite selection method is applied to guarantee optimal satellite geometry distribution during train operation. To evaluate the performance of the proposed train integrity resolution method, a real train test was carried out on the Beijing-Shenyang high speed railway. The experimental results show that the proposed train integrity resolution method can provide train integrity solutions with an accuracy of better than 0.5 m, with STD and RMS of 0.15 m and 0.17 m respectively. Compared with the conventional GNSS single point positioning based train integrity method, the proposed method can achieve a much better performance, with an improvement, in this test, of 77%.
AB - Train integrity resolution is an important part of a train operation control system. In current train operation control systems, train integrity resolution is achieved by using information on the track circuit or the wind pressure. However, both approaches have limitations; the utilization of the track circuits requires high construction and maintenance costs, and the wind pressure approach has to overcome the problem of low update rate and false alarm caused by the incident pipe leakage. In this paper a new train integrity resolution method based on double-differenced carrier phase relative positioning is proposed. To improve the system performance, an online integer ambiguity fixing method is applied to overcome the frequent integer ambiguity re-fixing problem caused by the high train speed and the complex operational environment. Moreover, the elevation angle constraint optimal distribution based reference satellite selection method is applied to guarantee optimal satellite geometry distribution during train operation. To evaluate the performance of the proposed train integrity resolution method, a real train test was carried out on the Beijing-Shenyang high speed railway. The experimental results show that the proposed train integrity resolution method can provide train integrity solutions with an accuracy of better than 0.5 m, with STD and RMS of 0.15 m and 0.17 m respectively. Compared with the conventional GNSS single point positioning based train integrity method, the proposed method can achieve a much better performance, with an improvement, in this test, of 77%.
KW - Double-difference carrier phase
KW - GNSS
KW - Relative positioning
KW - Train integrity resolution
UR - http://www.scopus.com/inward/record.url?scp=85095744548&partnerID=8YFLogxK
U2 - 10.1109/TVT.2020.3009724
DO - 10.1109/TVT.2020.3009724
M3 - Journal article
AN - SCOPUS:85095744548
VL - 69
SP - 10519
EP - 10530
JO - IEEE Transactions on Vehicular Communications
JF - IEEE Transactions on Vehicular Communications
SN - 0018-9545
IS - 10
M1 - 9144479
ER -