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Variable control setting to enhance rail vehicle braking safety

conference contribution
posted on 25.03.2021, 05:57 by Sundar Shrestha, Maksym Spiryagin, Qing Wu
Train braking technology needs to be advanced corresponding to the vehicle advancement to fully utilize the benefits of the potential capacity, efficiency and to ensure safety. The effectiveness of the braking changes as the friction condition at the wheel-rail interface and speed of rail vehicle change. The conventional brake control systems do not differentiate these changes in conditions and consider a constant slip reference. To overcome this issue, a new control algorithm for a wheel slide protection device incorporated in the electronically controlled pneumatic brake system has been proposed. Unlike conventional controllers, the proposed controller is responsive to the change of operational and environmental parameters between wheel and rail. It is designed based on multiple modes shifting during operations as the friction conditions change which allows to utilize the maximum adhesion available and to prevent the occurrence of sliding. The control algorithm is developed in a modular approach, where the first module identifies the adhesion condition at the wheel-rail interface. The result from the first module is further implemented in the second module to search for the optimum slip range for that adhesion condition and vehicle speed. For numerical simulation, a wagon model considering in-train forces is developed. The adhesion force is modeled by a proper definition of an adhesion-creep characteristics curve achieved from measured data. The comparison between the proposed control algorithm and the conventional algorithm suggests that the proposed control algorithm can optimally utilize available adhesion between wheel and rail to ensure shorter braking distance while maintaining vehicle stability. © 2020 ASME

Funding

Category 4 - CRC Research Income

History

Start Page

V001T09A001-1

End Page

V001T09A001-6

Number of Pages

6

Start Date

20/04/2020

Finish Date

22/04/2020

ISBN-13

9780791883587

Location

St Louis, MO

Publisher

The American Society of Mechanical Engineers

Place of Publication

Online

Peer Reviewed

Yes

Open Access

No

Author Research Institute

Centre for Railway Engineering

Era Eligible

Yes

Name of Conference

2020 Joint Rail Conference

Parent Title

Proceedings of the ASME Joint Rail Conference (JCR2020)

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