华东交通大学学报Issue(5)：13-17,5.
基于四点弦测法的轨面不平顺检测及复原方法
Rail Surface Irregularities Detection and Restoration Based on Four-point Chord Reference Method
摘要
Abstract
In order to realize continuous detection of rail surface irregularities and improve detection precision, a new four-point approach based on chord reference method is presented in this paper. With the theoretical de-duction of its transfer function,the automatic restoration algorithm based on Fast Fourier Transform(FFT)has been realized by means of MATLAB. A simulation waveform consisting of 20 random sine waves has been used for scientific determination of the three separation distances. The maximum value,average value and stan-dard deviation of restoration error are therefore adopted to weigh their restoration precision. Finally,on the ba-sis of optimal parameters,a length of 30m real track irregularities from Shanghai metro is used for comparison. Results show that restoration precision of the new four-point method has been controlled at micron level. In the aspect of restoration error’s average value and standard deviation,the detection precision has been improved over 50%and the maximum value has been improved over 70%when compared to the traditional three-point method.关键词
轨面不平顺/弦测法/复原算法/复原精度Key words
rail surface irregularities/chord reference method/restoration method/restoration precision分类
交通工程引用本文复制引用
毛晓君,许玉德,周宇..基于四点弦测法的轨面不平顺检测及复原方法[J].华东交通大学学报,2013,(5):13-17,5.基金项目
国家自然基金项目(50908179)；中央高校基本科研业务费专项资金资助项目 （50908179）
