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TECHNICAL BRIEFS

Optimization of Performance Characteristics of Electropneumatic (Two-Stage) Servo Valve

[+] Author and Article Information
Dr. Igor L. Krivts

Applied Materials Inc., PDC, Box 211, Nes-Ziona, 70451, Israele-mail: igor_krayvitz@amat.com

J. Dyn. Sys., Meas., Control 126(2), 416-420 (Aug 05, 2004) (5 pages) doi:10.1115/1.1771693 History: Received January 01, 2003; Revised September 15, 2003; Online August 05, 2004
Copyright © 2004 by ASME
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References

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Richard,  E., and Hurmuzlu,  Y., 2000, “A High Performance Pneumatic Force Actuator System, Part 1—Nonlinear Mathematical Model,” ASME J. Dyn. Syst., Meas., Control, 122, pp. 416–425.
Richard,  E., and Scavarda,  S., 1996, “Comparison between linear and nonlinear control of an electropneumatic servodrive,” ASME J. Dyn. Syst., Meas., Control, 118, pp. 245–252.
Backe,  W., 1986, “The application of servo pneumatic drives for flexible mechanical handling techniques,” Robotics, 2, pp. 45–56.
Shearer J. E. (1956), “Study of Pneumatic Process in the Continuous Control of Motion With Compressed Air-I, II,” Transactions of ASME, Feb., pp. 233–249.
Lin,  X., Spettel,  F., and Scavarda,  S., 1996, “Modeling and test of an electropneumatic servovalve controlled long rodless actuator,” ASME J. Dyn. Syst., Meas., Control, 118, pp. 457–462.

Figures

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Two-stage servo pneumatic valve with jet-pipe pilot stage
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Two-stage servo pneumatic valve with flapper-nozzle pilot valve on the exhaust ports
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Two-stage servo pneumatic valve with flapper-nozzle pilot valve on the supply ports
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Upstream and downstream flows conditions in the spool chamber
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Dimensionless difference pressure in the spool chambers.
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Threshold and hysteresis
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Settling time of the two-stage servo valve
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Frequency response for the servo valve with jet-pipe pilot valve

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