Condition monitoring of track geometry from sensors mounted on an in-service vehicle offers continual monitoring of track geometry that can aid track maintenance strategies. Mounting and maintaining a full track geometry recording system on an in-service vehicle is an expensive proposition as the commonly used optical sensors are difficult to keep working in the dirty railway environment. A simpler and more cost-effective alternative is to estimate track geometry using a small number of robust sensors such as accelerometers and rate gyroscopes, from which a worthwhile proportion of geometric quality measures and specific irregularities can be identified. This paper describes the theory and practical results of using a bogie-mounted pitchrate gyro to obtain mean vertical alignment, conditional on the secondary vertical damper geometry. Left and right axlebox-mounted accelerometers can be added to provide short wave-length irregularity, if required. Results from trials on Tyne and Wear Metro vehicles and on a Class 175 mainline vehicle demonstrate effective vertical irregularity monitoring, in particular the ability to monitor vertical irregularity over a wide range of vehicle speeds down to about 1 m s-1, where vertically sensing accelerometers combined with displacement transducers are unable to function correctly.
Monitoring vertical track irregularity from in-service railway vehicles
Überwachung der vertikalen Gleislage durch normale Wagons
2007
14 Seiten, 22 Quellen
Aufsatz (Zeitschrift)
Englisch
Zustandsüberwachung , Kostenoptimierung , Dämpfung , Gyroskop , Registriergerät , Eisenbahn , Messen geometrischer Größen , Messen mechanischer Größen , Drehgestell , Achslager , Sensor , Versuchsergebnis , Versuchsmethode , Beschleunigungsmesser , Bahn (Verkehr) , Fahrgeschwindigkeit , Fehlerortung , Kosteneffektivität
Monitoring vertical track irregularity from in-service railway vehicles
British Library Online Contents | 2007
|Monitoring vertical track irregularity from in-service railway vehicles
Online Contents | 2007
|Monitoring vertical track irregularity from in-service railway vehicles
SAGE Publications | 2007
|Monitoring lateral track irregularity from in-service railway vehicles
SAGE Publications | 2007
|Monitoring lateral track irregularity from in-service railway vehicles
Online Contents | 2007
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