Analyses of Vehicle Vibration Based on Virtual Reality

摘要

This paper presents the idea for analyses of the vehicle vibration based on Virtual Reality, whose setup block diagram is given. Using the World Tool Kid (WTK) software, the virtual proving ground is established and can be interacted with it. Also, a conception on power spectral density function (PSD) of non-stationary random process is presented and it is proved that the rough road PSD is non-stationary random process, i.e., Wiener process PSD.For the purpose of the vehicle vibration analyses on the engine and the random road excitations, a five-degree of freedom model is considered for half the vehicle and the simulation analyses is performed under the help of the mechanical system simulation code ADAMS. According to the five-DOF half vehicle model, we get the motion differential equations in the matrix form. Inputting the actual and testing parameters, as well as the engine and the random road excitations, into the model, the vibration is simulated. Simulation results show that the vertical acceleration PSD predicted using the virtual vehicle and road are in close agreement with that obtained using the actual vehicle and road.