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Novel determination of Wheel-Rail adhesion stability for electric locomotives

  • Kun Xu
  • Guoqing XuEmail author
  • Chunhua Zheng
Article

Abstract

Monitoring the wheel-rail adhesion state and maintaining the stability are the key issues to ensure the safety of locomotives with increasing running speed nowadays. In this paper, a novel methodology is proposed to determine the wheel-rail adhesion stability. It is proved that when the adhesion state is in the unstable region, the transmitting factor which is defined as the ratio of the adhesion force in the wheel drive force is negative. Based on this principle, we propose a novel adhesion stability detector via measuring the wheel drive torque and the wheel rotational speed. It is free from measuring or determining the chassis speed, creep ratio, and optimal creep ratio, which are usually difficult to obtain in practical applications. In addition, the proposed methodology can evaluate the adhesion state dynamically regardless of the specific wheel-rail conditions. Numerical simulations are carried out to validate its effectiveness.

Keywords

Adhesion stability Creep ratio Electric locomotive Transmitting factor Wheel-rail contact 

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Copyright information

© Korean Society for Precision Engineering and Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  1. 1.Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen, GuangdongChina
  2. 2.Department of Mechanical and Automation EngineeringThe Chinese University of Hong KongShatin, N. T., Hong KongChina
  3. 3.Shenzhen College of Advanced TechnologyUniversity of Chinese Academy of SciencesShenzhen, GuangdongChina
  4. 4.College of Electronics and Information EngineeringTongji UniversityShanghaiChina

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