Abstract
ABSTRACTHydro-gas suspension systems cushion shocks and damp oscillations of vehicle hullwhen it moves on uneven terrain. The hydro-gas suspension provides the vehiclewith proper ride comfort due to non-linear characteristics of hydro-gas units. Thehydro-gas suspension system can store a large amount of potential energy;accordingly, it can withstand higher shocks than the torsion bar suspension.Consequently, it is preferred to be used in the design of vehicle suspension. In thispaper, a mathematical model for hydro-gas unit used in BMR wheeled vehicle isestablished to evaluate its characteristics using Matlab /Simulink program. Themathematical model is validated experimentally using the data measured for the unitin laboratory using MTS (793) damper test system. The unit is tested using an inputsine wave excitation by a frequency and amplitude corresponding to real roadconditions.
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