Dynamic Characteristics of Cascaded, Blocked, Rectangular Cross Section Pneumatic Lines
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
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The transfer gain amplitude frequency response curve of a rectangular volume-terminated pneumatic transmission line was experimentally determined. The cross-sectional dimensions of a 29.454-in.-long line were 0.254 in. by 0.126 in., and the cross-sectional dimensions of the volume termination were 2.396 in. by 1.205 in. Several lengths of the volume termination 7 in. and less were studied at mean line pressures of 10, 25, and 40 psig. The sinusoidal driving signal was varied between 10 and 1220 Hz. A computer program was designed to provide solutions for theoretical transfer gain curves of the volume-terminated rectangular pneumatic line. The transfer gain equation, using an electrical-pneumatic analogy, was formulated using distributed impedance and admittance parameter equations for rectangular pneumatic lines based on the work of Schaedel. Correlation with experiment showed that the theory predicted the transfer gain usually within 3 dB and resonant frequencies within two per cent, as long as line measurements were accurate to within plus or minus 0.001 in.
- Fluidics and Fluerics