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论述了在滚动振动试验台上进行车辆垂向悬挂系统的辨识建模方法.通过试验,应用扩充最小二乘法,建立了车辆垂向悬挂系统的参数化模型“,”The method of modeling the suspension system of railway vehicles with system identification on rolling rig is described. Based on tests, a parametric model of vertical suspension system of railway vehicles is founded with extended least square method.