Analysis of the vibrational dynamics of a two-axle vehicle with real road surface roughness amplitude

Abstract

The calculation of automobile oscillations is crucial for evaluating stability and
vertical dynamic safety during vehicle operation. In this study, a two-axle vehicle dynamics
model is developed using differential equations to compute the vehicle's dynamic
oscillations. The Matlab-Simulink tool is utilized to solve these differential equations and
determine the dynamic response of the two-axle vehicle system subjected to external
excitations. These excitations are measured and simulated based on real road surface
irregularities recorded by a Walking Profiler device. The research results have successfully
developed a vehicle dynamics model that considers the random roughness of the road
surface during vehicle operation. The random roughness factor of the road surface is
incorporated into the simulation model as a primary excitation factor affecting the
characteristic outcomes of vehicle oscillations.