Harmonic Analysis of a Pneumatic Fixed Orifice

Abstract

Orifices, with constant or variable cross-section areas, are essential components in pneumatic circuits. Dynamic and static characteristics of pneumatic systems depend on their flow characteristics. They have a special role in control components in which are used for mass flow control. In this paper the focus is on pneumatic system consisted of fixed orifices and pneumatic chamber. The characteristics of the fixed orifice are presented in frequency domain. For the purpose of analysis, the sinusoidal input describing function is used, obtained by simulation with nonlinear model.