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本文用数字滤波器模拟汽车的车轮与悬挂系统以及路面对它的输入。根据车轮与悬挂系统的固有频率与相对阻尼因子以及路面自谱与互谱选择数字滤波器的参数,车桥与车身的纵向或横向转动惯量则由几个常数表示。将两个具有正态分布又彼此独立的白噪声输入数字模拟系统,由此计算出路面高程、四个车轮中心与车身的四个悬架节点的位移,并在微机上一幅幅显示出随路面向后移动时车辆的跳动、俯仰和侧倾运动。此法尤其适宜于工程分析。
In this paper, digital filters are used to simulate the wheel and suspension system of a car and the input to the road surface. According to the natural frequency and relative damping factor of the wheel and suspension system and the parameters of the digital filter selected from the spectrum of spectrum and spectrum of the road surface, the longitudinal or transverse moment of inertia of the axle and the vehicle body is represented by several constants. Two normal and independent white noises are input to the digital simulation system to calculate the displacement of the road surface elevation, the four wheel centers and the four suspension nodes of the vehicle body, and the amplitude of The vehicle beats, pitches and rolls when the road is moving backwards. This method is particularly suitable for engineering analysis.