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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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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