Abstract
Railway truck is necessary to have excellent curving performance as well as high speed hunting stability, but generally they are contrary to each other. In order to realize the compatibility, many trucks with passive steering mechanism have been studied. In order to realize further improvement of bogie steering ability on sharp curved track, active steering control can give effective performance. The truck treated here has simple but effective mechanism: Actuators are attached between the car body and bogie frames. If the truck frame is steered by actuators toward "radial steering position of the truck", the curving performance of the truck can be improved. This is the concept of active-bogie-steering (ABS) truck. In this paper, more detailed study and evaluation for ABS truck will be presented. Validity tests were carried out with the bogie on rolling test stand in NTSEL, which can simulate curving condition. Bogie parameters and steering actuator characteristics are elaborately identified in order to compare the experimental results with multi-body dynamics simulation. According to the test results and numerical simulation, the effectiveness of the proposed bogie mechanism and control are proved.
