Analysis of the Influence of Size Parameters on Hydro-Pneumatic Suspension Damping Characteristics Based on Simulink
Damping holes and one-way valves are important structures for achieving vibration attenuation in hydro-pneumatic suspension,and their structural parameters will directly affect the output characteristics of the hydro-pneumatic suspension.Ac-cording to the structural characteristics and output characteristics of the hydro-pneumatic suspension,the orifice flow characteris-tics of the damping holes and one-way valves were analyzed,and the resulting damping force changes were analyzed to obtain the output characteristic model of the entire system.Based on Simulink,the characteristic analysis model of hydro-pneumatic suspension was built,and the flow calculation sub-model of check valve and damping hole was designed.Under the periodic exci-tation,the oil flow rate and the damping characteristics of the motion and suspension of the two cavities of the system were ana-lyzed,and the reliability of the simulation model was verified by the test method.Based on the Simulink analysis model,the in-fluence of key parameters such as sprung mass,damping hole and check valve diameter on the characteristics of hydro-pneumatic suspension was analyzed.The results show that:with the increase of external excitation of hydro-pneumatic suspension,the dis-placement and velocity characteristics have changed greatly,and the periodic excitation results are closed curves.As the speed in-creases,the damping force also increases significantly,and the difference between the two strokes is large,showing asymmetric characteristics.When the size of the damping hole decreases,the work of the oil flowing through the damping hole increases,the attenuation effect of the system increases,and the influence on the spring mass is also small.After reaching a steady state,the amplitude of the simulation analysis and the experimental test are basically the same,indicating the accuracy of the mathemati-cal model and the simulation model,which provides a reference for such design.
Hydro-Pneumatic SuspensionOutput CharacteristicsDamping HoleOne Way ValveDamping ForceDiameter Size
万方数据
维普
