(1) the use of a systematic design approach for an ambulance stretcher damping system design. 

(2) study design of the gas spring, with its low rigidity get a lower resonant frequency, thereby obtaining a comfortable delivery effect.

(3) According to the damping characteristics, the use of two different cross-sectional area of the valve-controlled orifice produces airflow damped amplitude, so that optimum damping effect.

(4) to the ambulance floor before pitching up and down the bumps and vibration input as to establish the calculation model for vibration analysis. The design method and calculation methods with a more general sense, provides a theoretical basis for the design and calculation of other vibration system