Vehicle simulation and subjective and objective evaluation based on the nonlinear air spring model
As the application of the nonlinear air spring model,this paper conducted the dynamic simulation and subjective evaluation of the air suspension vehicle.Combined with frequency and amplitude dependency of the dynamic stiffness model of the air spring and Simulink simulation,a 7 degree-of-freedom model for vehicle with air suspension system was proposed.The root mean square value and power spectral density of suspension dynamic travel and sprung acceleration under different road conditions were compared.The dynamic characteristics of the air suspension vehicle under different speeds,road surfaces and shock absorber damping conditions were analyzed from the perspectives of time and frequency domain.The subjective and objective tests were carried out on the vehicle equipped with different air springs.The results show that the prediction error of suspension dynamic travel is less than 7%,and the prediction error of sprung position acceleration resonance peak value and resonance frequency is less than 6%.Therefore,the results verify the universality and accuracy of the proposed model.The model can reflect the dynamic characteristics of the vehicle with air suspension,and can provide mechanism explanations for subjective and objective ride comfort tests.
vehicle structureair spring modelair suspensiondynamic characteristicsride comfortsubjective and objective evaluation
NETL
NSTL
万方数据
