Rail contour matching method based on random vibrations of a rail inspection vehicle

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Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (3) : 65-69.

JU Biao1,ZHU Hongtao1,XU Juping2,WANG Zhiyong1,SUN Zheng1

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Abstract

Vertical vibration, swinging and roll steer, i.e., 3-DOF random vibrations of a rail inspection car are caused due to track irregularities in its detecting process. They may cause the rail contour graph to malposition with the standard rail contour graph, the rail contour high precise matching can not be conducted, it is very difficult to make a scientific and reasonable strategy for rail wear-repairing. Here, according to the principle that a plane can be determined with 3 non-collinear points, a rail contour matching method based on random vibrations of a rail inspection vehicle was proposed. The coordinates for the position information of the rail to be detected were transformed firstly to rotate and then to translate. The problem of lower accuray for rail contour matching due to random vibrations of the rail inspection car was solved, and the rail contour matching with a higher accuray was realized. This method was used in track inspection cars, tests showed that the rail profile matching accuracy can reach a micron level.

Key words

rail profile matching / high precision / DOF / coordinate transformation

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JU Biao1,ZHU Hongtao1,XU Juping2,WANG Zhiyong1,SUN Zheng1. Rail contour matching method based on random vibrations of a rail inspection vehicle[J]. Journal of Vibration and Shock, 2017, 36(3): 65-69

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