Damping Characteristics of Nonlinear Hydro-pneumatic Suspension

The statistics linearization method is used to study the damping characteristics of its rear hydro-pneumatic suspension of a dump truck.According to the principle of equality in the equivalent damping coefficients,the parameters of 3 different models are calculated in the increasing damping,the decreasing damping and the linear damping.Under the excitation of the steady random road,the comfort indexes including the body acceleration,suspension stroke,wheel dynamic load and damping power are worked out in Matlab/Simulink.Comparing with the results from the simulation under the nonlinear stiffness matching 3 damping models,the effect of different damping coefficients on the above indexes were obtained.The comparison shows that the increasing damping model is most suitable for the nonlinear hydro-pneumatic suspension.