The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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An Accurate Velocity Estimation using Low Resolution Tachometer of High-Speed Trains

고속열차의 저해상도 타코미터를 이용한 정확한 속도 추정에 관한 연구

  • Lee, Jae-Ho (Train control & Communication Research Team, Korea Railroad Research Institute) ;
  • Kim, Seong Jin (Train control & Communication Research Team, Korea Railroad Research Institute) ;
  • Park, Sungsoo (Train control & Communication Research Team, Korea Railroad Research Institute)
  • Received : 2017.10.13
  • Accepted : 2017.12.12
  • Published : 2018.01.01
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Abstract

Reliable velocity estimation technology for trains is one of technologies used to operate trains safely and effectively. Various sensors such as tachometers, doppler radars, and global positioning systems are used to estimate velocity of a train. Tachometer is widely used to estimate velocity of a trains due to its simplicity, small volume, cost-effectiveness, continuously measurement at high speed, and robustness against noise. Accuracy in the velocity calculation using a tachometer depends on quantization error, measurement error of wheel radius or diameter, and tachometer's imperfection from manufacturing or installation process. In this paper, we present an accurate velocity estimation method using a low-resolution tachometer, which is commonly installed on a high-speed train. Baseline estimation method is proposed to accurately calculate the velocity of the high-speed train from tachometer's pulses. HEMU-430x test train is used for the experiment and verification of the proposed method. Experimental results with several routes show that the proposed method is more accurate than a conventional method.

Keywords

References

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