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汽车转向盘角脉冲输入试验是汽车操纵稳定性试验的一项。在汽车转向盘角脉冲输入试验中,把汽车看成一个线性动态系统。汽车固有的幅频特性和相频特性可以说明横摆角速度对转向输入响应的真实程度,通过对汽车频率特性的分析可以很好地了解该车的动态特性。文中以某三厢车型转向盘转角脉冲输入单次试验数据为例,说明应用Matlab软件对汽车转向盘角脉冲输入试验的处理方法。
Car steering wheel angle pulse input test is a car handling stability test. In the car steering wheel angle pulse input test, the car as a linear dynamic system. The inherent amplitude-frequency characteristic and phase-frequency characteristic of the car can explain the true degree of response of the yaw rate to the steering input. The analysis of the car’s frequency characteristic can well understand the dynamic characteristics of the car. In this paper, a single-car steering wheel angle pulse input test data as an example to illustrate the use of Matlab software to the car steering wheel angle pulse input test approach.