Compressibility of air

But it is difficult to obtain satisfied performance of the system because of the compressibility of air and the nonlinearity of the system .

但是山于气体的压缩性、系统的非线性等因素的影响，使得气动比例位置控制系统难以获得满意的性能。

The pneumatic system is a nonlinear time-variant system because of the compressibility of air , the air mass flow rate through the valve , the friction force between the piston and the cylinder , etc.

由于气体具有压缩性、气体通过阀口流量的非线性和气缸存在摩擦力等原因，气动系统实际上属于非线性时变系统。

In view of the high compressibility of air , the non-linearity of the pneumatic components and the pressure losses of the tool , a pressure controller based on fuzzy logic was designed in order to improve its pick and place capability .

考虑空气的可压缩性、气动元件的非线性和微夹的压力损失，为提高微夹的拾取和释放微粒的能力，设计了基于模糊PD的压力控制器。