反力式制动试验台加载能力与检验结果真实性的分析

利用反力式制动试验台对前、后轮的加载能力进行了分析，并得出如下结论：（1）因存在系统的微观自激振动，致使滚筒对车轮的加载能力在一定范围内不停地波动；（2）加载能力一般不低于轴荷的60％，对于后轮行车制动力的检验，试验台加载能力的下限值可能低于60％；（3）为使后轮驻车制动力检验的加载能力不低于整车重力的20％，试验台应设置限制车辆后移的辅助设施，以提高驻车制动力的加载能力。

Analysis of Autheticity of Loading Capacity and Result of Testing of Reaction Force Type Brake Testing Rig

Loading capacity of front and rear wheels has been analysed by means of reaction force type brake testing rig and the following conclusions are obtained: (1)As there is micro self excited vibration of the system,the loading capacity of wheel on roeler flactuates unceasingly in a definite range;(2)while loading capacity is generally not less than 60% of axle load,Iower limit of loading capacity of the testing rig may be less than 60% for measurement of braking force of rear wheel during driving; (3)In order to make loading capacity of rear wheel not lower than 20% of whole vehicle weight in measurement of parking braking force,auxiliary outfit should be provided to limit backward motion for parking brake.