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【摘要】Curving performance and high speed stability for the bogie of railway vehicle are important in terms of running safety.In general,it is difficult to improve both curving performance and high speed stability because of trade-off problem resulting from primary suspension stiffness and wheelset hunting characteristics.In order to solve the problem,many bogies with passive steering mechanism have been studied and some of them are realized on service operation.However,passive steering mechanisms still have a certain limit of improvement. In this study,an active steering bogie,which has actuators attached between carbody and bogie frame,is