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An inertial measurement unit (IMU) comprising three accelerometers and three gyroscopes all of good quality, attached to the bogie of an in-service railway vehicle and suitably processed in conjunction with a tachometer signal and a GPS feed, tracks the location, orientation and trajectory of the bogie. Using this data, the condition of the track geometry can be assessed. By monitoring this data as...
The mechanical interface between vehicle-mounted shoegear and the third rail is critically important to the smooth running of electrically powered railway vehicles. An investigation is being undertaken into the static and dynamic interactions between shoegear and the third rail. This is being done by instrumenting the shoegear of a class 375 railway vehicle in the UK.
Railways are expected to operate with ever increasing levels of availability, reliability, safety and security. One way of ensuring high levels of dependability is through the use of condition monitoring systems. This paper presents initial results from operational trials of track circuit condition monitoring equipment installed at two TI21 audio frequency track circuits in the UK.
Track recording vehicle equipment has been miniaturised to such an extent that it can be mounted on an in-service vehicle for monitoring track geometry. An alternative approach is to mount a few robust sensors such as accelerometers and rate gyroscopes onto the bogie and axleboxes of an in-service vehicle. The track geometry information that can be obtained from these sensors is incomplete; in particular...
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