Riding comfort analysis for two degrees model for mannedl lunarv vehicle

Two degrees of freedom of suspension vibration model was established for deployable manned lunar vehicle. Transfer characteristics and amplitude frequency characteristics of vibration response including body acceleration, suspension dynamic deflection and wheel relative dynamic load were obtained. Then lunar surface random excitation model in time domain was established according to the filtered white noise method. In order to analyze the affection of four parameters that is vehicle natural frequency, damping ratio, stiffness ratio and the mass ratio of two-degree system of manned lunar vehicle on mean square value of the vibration response, numerical integral approach was used to calculate. These provide theoretical basis for suspension design and riding comfort analysis for manned lunar vehicle.