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This paper summarizes the track-condition-monitoring system for conventional and high speed railway used in Japanese railway. For conventional railway, rail irregularities are estimated from the vertical and lateral acceleration of the car body. The roll angle of the car body, calculated using a rate gyroscope, is used to distinguish line irregularities from level irregularities. Rail corrugation...
This paper summarizes the development of "probe-vehicle" system for advanced railway condition monitoring. We developed a portable condition monitoring system for track which is easily set on in-service vehicle. In this system, irregularities of rail are estimated from vertical and lateral acceleration of car body. A roll angle of car body, which is calculated using a rate gyroscope, is...
This paper reports on the measured wheel-rail creep force characteristics and the mechanism of corrugation formation by using a full-scale bogie on a test stand. The measured creep characteristics agree well with the calculated values based on Kalker's linear theory. The relationship between creep characteristics and contact position is also discussed. The results show that a small change in wheelset...
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