This paper presents a computer aided procedure for the design of laminar proportional fluid amplifiers and gain blocks. The procedure is based upon a fundamental analysis of the flow regimes in an amplifier. With the aid of a computer, amplifier static and dynamic characteristics, required in control system design, may be determined as a function of geometry and fluid properties. The procedure is illustrated and evaluated by comparison of predicted design and experimentally measured performance. The procedure has been applied to individual elements designed by three different organizations, multistage gain blocks, and laminar jet rate sensor preamplifiers. The results of the procedure are shown to be quite accurate over a wide range of amplifier geometries (eleven different amplifiers with aspect ratio from 0.25 to 3 – a range of 12 to 1 – and nozzle sizes from 0.5 to 10 mm) and operating fluids (both air and oil). Experimental measurements were within 10 percent of the design predictions for amplifier gains, operating resistances, and bandwidth for all examples investigated.
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December 1975
Research Papers
Computer-Aided Design Procedure for Laminar Fluidic Systems
T. M. Drzewiecki,
T. M. Drzewiecki
Fluidic Systems Research Branch, Harry Diamond Laboratories, Adelphi, Md.
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D. N. Wormley,
D. N. Wormley
Dept. of Mechanical Engineering, MIT, Cambridge, Mass.
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F. M. Manion
F. M. Manion
Fluidic Systems Research Branch, Harry Diamond Laboratories, Adelphi, Md.
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T. M. Drzewiecki
Fluidic Systems Research Branch, Harry Diamond Laboratories, Adelphi, Md.
D. N. Wormley
Dept. of Mechanical Engineering, MIT, Cambridge, Mass.
F. M. Manion
Fluidic Systems Research Branch, Harry Diamond Laboratories, Adelphi, Md.
J. Dyn. Sys., Meas., Control. Dec 1975, 97(4): 373-382 (10 pages)
Published Online: December 1, 1975
Article history
Received:
July 11, 1975
Online:
July 13, 2010
Citation
Drzewiecki, T. M., Wormley, D. N., and Manion, F. M. (December 1, 1975). "Computer-Aided Design Procedure for Laminar Fluidic Systems." ASME. J. Dyn. Sys., Meas., Control. December 1975; 97(4): 373–382. https://doi.org/10.1115/1.3426953
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