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Keywords = PLS-160 wheel–rail adhesion test rig

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15 pages, 4529 KiB  
Article
Experimental Investigation on Sanding Effect of Rail Vehicles Under Low-Adhesion Conditions
by Feng Qiao, Chao Chen, Ming Zhao, Chuan Yang, Jiajun Zhou and Chun Tian
Lubricants 2025, 13(6), 270; https://doi.org/10.3390/lubricants13060270 - 17 Jun 2025
Viewed by 423
Abstract
To investigate the adhesion characteristics and sanding effect of rail vehicles on a contaminated rail surface, an innovative wheel/ring configuration test rig, named the PLS-Circulator, was employed. Based on the equivalence principle, the sanding condition relationship between the test rig and the field [...] Read more.
To investigate the adhesion characteristics and sanding effect of rail vehicles on a contaminated rail surface, an innovative wheel/ring configuration test rig, named the PLS-Circulator, was employed. Based on the equivalence principle, the sanding condition relationship between the test rig and the field was first established. Then, extensive and quantitative experiments on the enhancement of rail vehicle adhesion in sanding conditions were conducted. The results show that the maximum adhesion coefficient of various media increases with an increase in the amount of sand, and the adhesion-enhancing effects gradually reach the threshold when the amount of sand is high. On the other hand, after a single application of sand, the increase in the adhesion coefficient gradually decreases over time, and the pattern of adhesion enhancement degradation varies in different media. It was found that oil is the most unfavorable condition, where the adhesion-enhancing effect deteriorates the fastest. The appropriate amount of sand on the PLS-Circulator is 0.3 g/m, corresponding to 4.8 g/m of sand in the field. Full article
(This article belongs to the Special Issue Tribology in Railway Engineering)
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20 pages, 7191 KiB  
Article
Study on Creepage Control for PLS-160 Wheel–Rail Adhesion Test Rig Based on LADRC
by Chun Tian, Gengwei Zhai, Yingqi Gao, Chao Chen and Jiajun Zhou
Sensors 2023, 23(4), 1792; https://doi.org/10.3390/s23041792 - 5 Feb 2023
Cited by 4 | Viewed by 1791
Abstract
Aiming at the problem of low control accuracy caused by nonlinear disturbances in the operation of the PLS-160 wheel–rail adhesion test rig, a linear active disturbance rejection controller (LADRC) suitable for the wheel–rail adhesion test rig was designed. The influence of nonlinear disturbances [...] Read more.
Aiming at the problem of low control accuracy caused by nonlinear disturbances in the operation of the PLS-160 wheel–rail adhesion test rig, a linear active disturbance rejection controller (LADRC) suitable for the wheel–rail adhesion test rig was designed. The influence of nonlinear disturbances during the operation of the test rig on the control accuracy was analyzed based on SIMPACK. The SIMAT co-simulation platform was established to verify the control performance of the LADRC designed in this paper. The simulation results show that the speed and creepage errors of the test rig under the control of the LADRC met the adhesion test technical indicators under four different conditions. Compared with the traditional PID controller, the creepage overshoot and response time with the LADRC were reduced by 1.27% and 60%, respectively, under the constant creepage condition, and the stability recovery time was shorter under the condition of a sudden decrease in the adhesion coefficient. The LADRC designed in this paper shows better dynamic and anti-interference performance; therefore, it is more suitable for a follow-up study of the PLS-160 wheel–rail adhesion test rig. Full article
(This article belongs to the Topic Industrial Control Systems)
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