Abstract
AbstractExperimental researches show that the gas polytropic process does not follow the ideal gas state equation. And the accuracies of the commonly applied real gas models are limited because the impact of gas hysteresis is neglected. In this paper, a novel real gas state equation considering gas hysteresis is derived. The main factor is the compression ratio of gas and the gas hysteresis time is introduced into this model. Based on that, the dynamic model of roll motion property of suspension system is derived combining with the geometric model of 6 cylinders hydro-pneumatic suspension. Sinusoidal excitation tests under different working conditions are carried out and the simulation and experimental results are compared. The maximum discrepancy of roll moment is 5.3%. The results indicate that the model can accurately reflect the roll property of hydro-pneumatic system.KeywordsHydro-pneumatic suspensionGas hysteresisReal gas state equationDynamic property
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