方向盘转角阶跃输入时汽车的瞬态响应试验是汽车操纵性最重要的试验之一。但实际上理想阶跃是无法实现的,只能输入一个斜阶跃国际标准化组织ISO/TC22/SC9在制定试验标准(草案)时,对斜阶跃输入没有作出十分明确的规定,本文分析了斜阶跃对瞬态试验结果的影响,并用汽车线性四自由度的模型的计算进行了验证,为制定合理的试验方法提供依据。 One of the most important tests of vehicle maneuverability is the transient response test of the car at steer angle step input. But in fact the ideal step can not be achieved, only one skew step can be input. The ISO / TC22 / SC9 does not make any explicit stipulations on the input of skew steps when formulating the test standard (draft). In this paper, The influence of skew step on the transient test results is verified by the calculation of the model of linear four-degree-of-freedom vehicle, which provides a basis for the development of a reasonable test method.