| Title |
An Accurate Velocity Estimation using Low Resolution Tachometer of High-Speed Trains |
| Authors |
이재호(Jae-Ho Lee) ; 김성진(Seong Jin Kim) ; 박성수(Sungsoo Park) |
| DOI |
http://doi.org/10.5370/KIEE.2018.67.1.131 |
| Keywords |
Tachometer ; Velocity estimation ; High-speed train ; Baseline estimation |
| 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. |