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TECHNICAL PAPERS

Position Control of a Cylinder Using a Hydraulic Bridge Circuit With ER Valves

[+] Author and Article Information
Seung-Bok Choi, Woo-Yeon Choi

Smart Structures and Systems Laboratory, Department of Mechanical Engineering, Inha University, Incheon 402-751, Korea

J. Dyn. Sys., Meas., Control 122(1), 202-209 (Jul 10, 1997) (8 pages) doi:10.1115/1.482443 History: Received July 10, 1997
Copyright © 2000 by ASME
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References

Watton, J., 1988, Fluid Power Systems, Prentice Hall, Upper Saddle River, NJ.
Lin,  S. J., and Akers,  A., 1989, “A Dynamic Model of the Flapper-Nozzle Component of an Electrohydraulic Servo Valve,” ASME J. Dyn. Syst., Meas., Control, 111, pp. 105–109.
Bullough,  W. A., 1991, “Liquid State Force and Displacement Devices,” Mechatronics, 1, No. 1, pp. 1–10.
Petek, N. K., Rimstadt, D. J., Lizal, M. B., and Weyenberg, T. R., 1995, “Demonstration of an Automotive Semi-Active Suspension Using Electrorheological Fluid,” SAE paper, No. 950586.
Morishita, S., and Mitsui, J., 1992, “An Electronically Controlled Engine Mount Using Electro-Rheological Fluid,” SAE Paper, No. 922290.
Choi,  S. B., Cheong,  C. C., and Kim,  G. W., 1997, “Feedback Control of Tension in a Moving Tape Using an ER Brake Actuator,” Mechatronics, 7, No. 1, pp. 53–66.
Choi,  S. B., Cheong,  C. C., and Park,  Y. K., 1996, “Active Vibration Control of Intelligent Composite Laminate Structures Incorporating an Electro-Rheological Fluid,” J. Intell. Mat. Syst. Struct., 7, pp. 411–419.
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Nakano, M., and Yonekawa, T., 1994, “Pressure Response of ER Fluid in a Piston Cylinder-ER Valve System,” Proceedings of the 4th International Conference on Electrorheological Fluids, pp. 477–489.
Whittle,  M., Firoozian,  R., and Bullough,  W. A., 1994, “Decomposition of the Pressure in an ER Valve Control System,” J. Intell. Mat. Syst. Struct., 5, No. 1, pp. 105–111.
Adriani,  P. M., and Gast,  A. P., 1988, “A Microscopic Model of Electrorheology,” Phys. Fluids, 31, No. 10, pp. 2757–2768.
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Figures

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Bingham property of the employed ER fluid. (a) Shear stress, (b) yield stress.
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Geometry of a cylindrical ER valve
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The manufactured cylindrical ER valve. (a) Assembly drawing, (b) photograph.
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Field-dependent step responses of the ER valve
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ER valve bridge circuit
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ER valve bridge-cylinder system
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A neural network controller incorporating the PID controller. (a) Block-diagram, (b) network architecture.
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Experimental configuration for the position control. (a) Schematic diagram, (b) photograph.
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Set position control responses without cart. (a) Simulated, (b) measured.
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Set position control responses with cart. (a) Simulated, (b) measured.
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Square trajectory tracking control responses with cart. (a) Simulated, (b) measured.
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Sinusoidal trajectory tracking control responses with cart. (a) Simulated, (b) measured.
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Comparison of measured tracking responses with cart. (a) Neural network, (b) PID.
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Measured tracking durability of the control system

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