A Linearized Electrohydraulic Servovalve Model for Valve Dynamics Sensitivity Analysis and Control System Design

[+] Author and Article Information
Dean H. Kim

Department of Mechanical Engineering, Bradley University, Peoria, IL 61625

Tsu-Chin Tsao

Mechanical & Aerospace Engineering Department, University of California, Los Angeles, Los Angles, CA 90095-1597

J. Dyn. Sys., Meas., Control 122(1), 179-187 (Feb 02, 1998) (9 pages) doi:10.1115/1.482440 History: Received February 02, 1998
Copyright © 2000 by ASME
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Hori,  N., Pannala,  A. S., Ukrainetz,  P. R., and Nikiforuk,  P. N., 1989, “Design of an Electrohydraulic Positioning System Using a Novel Model Reference Control Scheme,” ASME J. Dyn. Syst., Meas., Control, 111, pp. 294–295.
Lee,  S. R., and Srinivasan,  K., 1990, “Self-Tuning Control Application to Closed-Loop Servohydraulic Material Testing,” ASME J. Dyn. Syst., Meas., Control, 112, pp. 682–683.
Thayer, W. J., 1958, “Transfer Functions for Moog Servovalves,” Moog Technical Bulletin 103, East Aurora, Moog Inc., Controls Division, New York.
Akers,  A., and Lin,  S. J., 1988, “Optimal Control Theory Applied to a Pump with Single-Stage Electrohydraulic Servovalve,” ASME J. Dyn. Syst., Meas., Control, 110, p. 121.
Shichang,  Z., Xingmin,  C., and Yuwan,  C., 1991, “Optimal Control of Speed Conversion of a Valve Controlled Cylinder System,” ASME J. Dyn. Syst., Meas., Control, 113, p. 693.
Merritt, H. E., 1967, Hydraulic Control Systems, Wiley, New York, pp. 147–150 and 312–318.
Watton, J., 1989, Fluid Power Systems: Modeling, Simulation, Analog and Microcomputer Control, Prentice Hall, New York, pp. 43–60 and 100–110.
Lin,  S. J., and Akers,  A., 1989, “A Dynamic Model of the Flapper-Nozzle Component of an Electrohydraulic Servovalve,” ASME J. Dyn. Syst., Meas., Control, 111, pp. 105–109.
Kim, D. H., and Tsao, Tsu-Chin, 1997, “An Improved Linearized Model for Electrohydraulic Servovalves and its Usage for Robust Performance Control System Design,” Proceedings of the American Control Conference, pp. 3807–3808.
Tsao, T.-C., Hanson, R. D., Sun, Z., and Babinski, A., 1998, “Motion Control of Non-Circular Turning Process for Camshaft Machining,” Proceedings of the Japan-U.S.A. Symposium on Flexible Automation, Otsu, Japan, pp. 485–489.
Zames,  G., and Francis,  B. A., 1984, “On H Optimal Sensitivity Theory for SISO Feedback Systems,” IEEE Trans. Autom. Control., AC-29, No. 4, pp. 11–13.
Francis, B. A., 1987, A Course inHControl Theory, Springer-Verlag, Berlin, pp. 15–22 and 75–83.
Glover,  K., and Doyle,  J., 1988, “State-Space Formulae for All Stabilizing Controllers That Satisfy an H Norm Bound and Relations to Risk Sensitivity,” Syst. Control Lett., 11, pp. 167–172.
Doyle,  J. C., Glover,  K., Khargonekar,  P. P., and Francis,  B. A., 1989, “State-Space Solutions to Standard H2 and H Control Problems,” IEEE Trans. Autom. Control., AC-34, No. 8, pp. 831–847.
Kwakernaak,  H., 1985, “Minimax Frequency Domain Performance and Robustness Optimization of Linear Feedback Systems,” IEEE Trans. Autom. Control., AC-30, No. 10, pp. 994–1004.
McCloy, D., and Martin, H. R., 1973, Control of Fluid Power, John Wiley and Sons, Inc., New York, pp. 120–125, 180–185.
Smith, J. O., 1983, “Techniques for Digital Filter Design and System Identification with Application to the Violin,” Ph.D. dissertation, Electrical Engineering Dept., Stanford University, p. 50.
Chen,  M. J., and Desoer,  C. A., 1982, “Necessary and Sufficient Condition for Robust Stability of Linear Distributed Feedback Systems,” Int. J. Control, 35, pp. 255–267.
Doyle, J., Francis, B., and Tannenbaum, A., 1992, Feedback Control Theory, MacMillan Publishing Company, New York, pp. 88–91.
Balas, G., Doyle, J. C., Glover, K., Packard, A., and Smith, R., 1991, μ-Analysis and Synthesis Toolbox, The MathWorks, Inc., Natick, MA.
Kim, D. H., and Tsao, Tsu-Chin 1997, “Robust Performance Control of Electrohydraulic Actuators for Camshaft Machining,” ASME publication FPST-Vol. 4/DSC-Vol. 63, Fluid Power Systems and Technology: Collected Papers.


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Electrohydraulic servo actuator
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Control system block diagram
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Frequency responses of the servovalve
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Frequency responses of the actuator (dot line: 15 mV input; dash line: 50 mV input; solid line: model)
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Comparison of servovalve models (solid line: average of experimental data; dot line: second order model; dash line: third order model; dot-dash line: derived model)
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Mixed sensitivity problem as a standard problem
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Experimental step responses (dash-dot line: using K5; dot line: using K6; dash line: using K8; solid line: plant)
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Performance weights and experimental sensitivites (dot line: using K5 from the second order model; dash line: using K6 from the third order model; solid line: using K8 from the derived fifth order model)
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Multiplicative uncertainties of the plant models (dash-dot line: Wr5; dot line: Wr6; dash line: Wr8)




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