High-Speed Train Emergency Brake Modeling and Online Identification of Time-Varying Parameters
Joint Authors
Hei, Xinhong
Jin, Yongze
Xie, Guo
Chen, Pang
Ji, Wenjiang
Zhao, Jinwei
Source
Mathematical Problems in Engineering
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-06-15
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Abstract EN
By analyzing the mechanism of pure air emergency brake for high-speed train, the discrete emergency brake model is established.
Aiming at the problem that time-varying hidden parameters cannot be observed directly, the sliding window-based expectation maximization is proposed, and the unobserved time-varying brake parameters are identified.
Firstly, the position and size of the sliding window are selected; then, the sliding window-based expectation maximization is used for brake parameter identification; finally, combined with the gradient optimization, the optimal identifications of emergency brake parameters are obtained.
The simulation results show that the brake parameters can be identified quickly and accurately by the proposed method.
Under uniform noise, the identification errors of friction coefficient and braking ratio are ±0.0068 and ±0.0349, respectively, and the maximum relative errors between the identifications and true values are 2.4807% and 1.3154%, respectively, which can meet the actual requirements of the brake system.
The effectiveness and practicability of the proposed model and method are verified.
American Psychological Association (APA)
Jin, Yongze& Xie, Guo& Chen, Pang& Hei, Xinhong& Ji, Wenjiang& Zhao, Jinwei. 2020. High-Speed Train Emergency Brake Modeling and Online Identification of Time-Varying Parameters. Mathematical Problems in Engineering،Vol. 2020, no. 2020, pp.1-13.
https://search.emarefa.net/detail/BIM-1194701
Modern Language Association (MLA)
Jin, Yongze…[et al.]. High-Speed Train Emergency Brake Modeling and Online Identification of Time-Varying Parameters. Mathematical Problems in Engineering No. 2020 (2020), pp.1-13.
https://search.emarefa.net/detail/BIM-1194701
American Medical Association (AMA)
Jin, Yongze& Xie, Guo& Chen, Pang& Hei, Xinhong& Ji, Wenjiang& Zhao, Jinwei. High-Speed Train Emergency Brake Modeling and Online Identification of Time-Varying Parameters. Mathematical Problems in Engineering. 2020. Vol. 2020, no. 2020, pp.1-13.
https://search.emarefa.net/detail/BIM-1194701
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1194701