Abstract
In this study we make clear the characteristics of an air suspension with a viscous or orifice restriction and a reservoir tank. We can choose the optimal value of flow coefficient of viscous restriction to minimize resonance amplitude. The maximum value of the transfer function doesn't depend on the oscillating amplitude in case of the viscous restriction. However, it depends on the oscillating amplitude in case of the orifice restriction. Thus, an air suspension with a viscous restriction is better for isolating the small vibration, in case of the high precision machinery.
