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Whilst many elements of a modern electric railway would still be recognisable to a nineteenth century pioneer traction engineer, notably the power supply arrangements and the traction motors, the methods of control would be a complete surprise. Electronic devices, both high-power silicon switches and low-power information processing chips, have revolutionised the control technologies employed to achieve...
This paper presents an analysis of the energy storage requirements for hybrid railway vehicles. Autonomous hybrid railway vehicles combine two power sources. The conventional diesel prime-mover is supplemented with power derived from an on-board energy storage device. The device is discharged during high power demand, and may be recharged through regenerative braking. The energy savings that are achievable...
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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