Research on Simulation and Experiment of Hydro-pneumatic Suspension with Single Gas Cell

Abstract

By reference to the research experience and achievement of hydraulic damper, the nonlinear mathematic model of hydro-pneumatic suspension with single gas cell is set up, in which seal friction is included. Under different gas charging pressure, a hydro-pneumatic suspension with single gas cell is carried out. The output force of the suspension and displacement of cylinder block relative to piston are measured in test process. The virtual model of the hydro-pneumatic suspension is set up through ADAMS software. A simulation is performed by inputting the curve of displacement varying with time into the virtual model. Key parameters in mathematic model are revised by comparing the displacement character istic curve and velocity character istic curve of simulation with that of test, which testifies that the mathematic model is precise. Test results are respectively compared with simulation results including seal friction and that without seal friction, which shows that the mathematic model including seal friction is more precise, but the effect of seal friction on the precision of mathematic model is below 5 percent. The seal friction can be neglected if the performance of hydro-pneumatic suspension is evaluated roughly.