Journal
VEHICLE SYSTEM DYNAMICS
Volume 60, Issue 10, Pages 3631-3649Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00423114.2021.1968443
Keywords
Railway; speed estimation; inertial sensors; track monitoring; crosslevel
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Funding
- Engineering and Physical Sciences Research Council (EPSRC) [EP/M025276]
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The study proposes a practical method for track alignment estimation using real data from an in-cab inertial measurement system and a novel method based on crosslevel variations. Speed estimation is done through speed-related harmonics detected on inertial sensors, and distance correction is provided by comparing crosslevel derived from inertial sensors and a reference track geometry.
In railways, using a track- and ride-quality monitoring system on in-service train has become desirable for coordination and security. Identification of the track- or train-related rough rides via train crew can be estimated to the nearest kilometre. However, if the train is equipped with a monitoring system a better location and track quality evaluation can be provided. These systems commonly use information such as GNSS and/or an odometer to provide location information. This work proposes a practical method for track alignment estimation using real data from an in-cab inertial measurement system and using also a novel method based on crosslevel variations. The speed estimation is done through speed-related harmonics detected on inertial sensors, which depend on speed and track characteristics; and distance correction is provided by comparing crosslevel derived from inertial sensors and a reference track geometry. The effectiveness and accuracy of the method is demonstrated with data collected between London and Ashford.
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