Experimental and numerical investigations of asymmetric chord-reference system regarding track geometry measurement

Cong，Jianli1,2; Tang，Huiyue3,4,5; Wang，Yuan6; Chen，Rong1,2; Wang，Ping1,2

2021-09-01

10.1016/j.measurement.2021.109743

MEASUREMENT   影响因子和分区

0263-2241

This paper studies the error theory of the asymmetric chord-reference system (ACR-system) for track geometry measurement. In contrast to mid-chord offset system (MCO-system), ACR-system shows a much better band-pass response even in very short wavelengths. The implementation of the ACR-system is challenging due to its nonlinear phase response. Based on z-transform, the inverse system of the ACR-system is realized by designing an infinite impulse response (IIR) filter. Moreover, the stability of ACR-system is explained according to the stability of the IIR filter. To quantify the error accumulation of the ACR-system, error amplification factor (EAF) is defined in spatial domain, and critical wavelength (CW) is defined in wavelength domain. To demonstrate the performance of ACR-system, a measurement trolley is developed and calibrated using a high precision marble platform. A field measurement is carried out on a 500-meter-long rail section. Finally, a comparison between the filtering and non-filtering implementations of the inverse system shows that the filtering method outperforms the non-filtering one.

Asymmetric chord-reference system Error amplification factor Error theory Inverse filtering Track geometry

SCI ; EI

英语

其他

WOS:000684541200003

20212510530168

Errors ; IIR filters ; Impulse response ; Inverse problems ; Z transforms

Electric Filters:703.2 ; Mathematics:921 ; Mathematical Transformations:921.3

ENGINEERING

2-s2.0-85108074117

Scopus

1.School of Civil Engineering,Southwest Jiaotong University,Chengdu,China
2.Key Laboratory of High-speed Railway Engineering,Ministry of Education,Chengdu,China
3.Institute of Robotics and Intelligent Manufacturing,The Chinese University of Hong Kong,Shenzhen,China
4.Shenzhen Institute of Artificial Intelligence and Robotics for Society,Shenzhen,China
5.School of Computer Science and Technology,University of Science and Technology of China,Hefei,China
6.School of System Design and Intelligent Manufacturing,Southern University of Science and Technology,Shenzhen,China

Cong，Jianli,Tang，Huiyue,Wang，Yuan,et al. Experimental and numerical investigations of asymmetric chord-reference system regarding track geometry measurement[J]. MEASUREMENT,2021,182.

Cong，Jianli,Tang，Huiyue,Wang，Yuan,Chen，Rong,&Wang，Ping.(2021).Experimental and numerical investigations of asymmetric chord-reference system regarding track geometry measurement.MEASUREMENT,182.

Cong，Jianli,et al."Experimental and numerical investigations of asymmetric chord-reference system regarding track geometry measurement".MEASUREMENT 182(2021).