针对城际线路中广泛存在的小半径曲线导致的动车组曲线通过性能不足及轮轨严重磨耗问题，现以城际动车组为对象，在其轴箱与转向架布置横向作动器，形成主动径向转向架。该作动器能够驱使轮对横向移动，使得车辆沿纯滚动线运动。搭建了作动器系统模型，并采用分数阶PI（proportion integration）控制器验证了在负载突变干扰情况下，作动器对期望轨迹跟踪的快速性、准确性和稳定性。利用SIMPACK和MATLAB/Simulink软件，建立了主动径向城际动车组的动力学模型。通过分析轮对冲角、磨耗数、轮轨横向力和脱轨系数等动力学指标，评价了运行速度和曲线半径对车辆曲线通过性能的影响。此外，采用Jendel磨耗模型评估了车辆通过500米曲线半径时的轮轨磨耗性能。研究结果表明：将纯滚线距线路中心线的距离作为作动器的位移控制目标是合理的。当曲线半径为500米时，与传统被动控制相比，新型主动径向控制车辆的轮轨横向力最大值降低了12%，轮对冲角最大值减少了8%，脱轨系数下降了20%，车轮磨耗数最大值减少了12%。1位轮对外侧和内侧车轮磨耗深度分别降低了31%和12%，曲线外侧和内侧钢轨的磨耗深度分别减少了20%和15%。因此，该型主动径向转向架显著提升了车辆的曲线通过性能，并有效减少了轮轨磨耗。

To address the issues of insufficient curve negotiation performance and severe wheel-rail wear caused by the prevalence of small-radius curves on intercity lines, this paper focuses on intercity electric multiple units (EMUs). An actuator was laterally installed between the axle box and bogie to form an active radial bogie. This actuator enables lateral movement of the wheelset, allowing the vehicle to follow a pure rolling line. A actuator system model was developed, and a fractional-order PI controller was employed to verify the actuator's rapidity, accuracy, and stability in tracking the desired trajectory under load disturbance conditions. Using the SIMPACK and MATLAB/Simulink software, a dynamic model of the active radial intercity EMUs was established. The study analyzed dynamic indexes such as wheelset yaw angle, wear number, lateral wheel-rail force, and derailment coefficient to evaluate the effect of operating speed and curve radius on the vehicle's curve negotiation performance. Additionally, the Jendel wear model was used to assess the wheel-rail wear performance when the vehicle passing a 500-meter curve radius. The results show that using the distance from the pure rolling line to the centerline of the track as the displacement control target for the actuator is reasonable. When passing the curved track with a radius of 500 meters, compared with traditional passive vehicles, the new type of active radial vehicle shows a 12% reduction in maximum lateral wheel-rail force, an 8% decrease in maximum wheelset coning angle, the derailment coefficient decreased by 20%, and the maximum wheel wear number decreased by 20%. The wear depth of the outer and inner wheels of the first wheelset was reduced by 31% and 12%, respectively, and the wear depth of the outer and inner rails of the curved track was reduced by 20% and 15%, respectively. Therefore, this type of active radial bogie significantly improves the vehicle's curve negotiation performance and effectively reduces wheel and rail wear.