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TECHNICAL PAPERS

Semiactive Isolator With Liquid-Crystal Type ER Fluid for Momentum-Wheel Vibration Isolation

[+] Author and Article Information
Hyun-Ung Oh, Junjiro Onoda, Kenji Minesugi

The Institute of Space and Astronautical Science, Dept. of Space Transportation, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229-8510, Japan

J. Vib. Acoust 126(2), 272-277 (May 04, 2004) (6 pages) doi:10.1115/1.1646418 History: Received November 01, 2001; Revised February 01, 2003; Online May 04, 2004
Copyright © 2004 by ASME
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References

Rodden, J. J., Dougherty, H. J., Reschke, L. F., Hasha, M. D., and Davis, L. P., 1986, “Line-of-Sight Performance Improvement With Reaction-Wheel Isolation,” Proceedings of the Annual Rocky Mountain Guidance and Control Conference, Keystone, CO, February, San Diego, CA, Univelt, Inc., pp. 71–84.
Onoda,  J., Oh,  H.-U., and Minesugi,  K., 1997, “Semiactive Vibration Suppression With Electrorheological-Fluid Dampers,” AIAA J., 35(12), December, pp. 1844–1852.
Onoda,  J., and Minesugi,  K., 1996, “Semi-Active Vibration Suppression by Variable Damping Members,” AIAA J., 34(2), February, pp. 335–361.
Onoda,  J., and Minesugi,  K., 1994, “Semi-Active Vibration Suppression of Truss Structures by Coulomb Friction,” J. Spacecr. Rockets, 31(1), pp. 67–74.
Choi,  S.-B., and Park,  Y.-K., 1994, “Active Vibration Control of a Cantilevered Beam Containing an Electro-Rheological Fluid,” J. Sound Vib., 177(3), pp. 428–432.
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Lee, J.-K., and William, W. C., 1999, “Lyapunov Semi-Active Vibration Control With an MR Fluid Actuator,” 40th AIAA/ASME/ASCE/AHS/ASC Structural Dynamics, and Materials Conference, ST. Louis, MO, April 12–15, pp. 2655–2661.
Wu,  X., and Griffin,  M. J., 1997, “A Semiactive Control Policy to Reduce The Occurence and Severity of End-Stop Impacts in a Suspension Seat With an Electrorheological Fluid Damper,” J. Sound Vib., 203(5), pp. 781–793.
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Lieh,  J., 1993, “Semiactive Damping Control of Vibrations in Automobiles,” ASME J. Vibr. Acoust., 115(3), July, pp. 340–343.
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Hidaka,  S., Ahn,  Y.-K., and Morishita,  S., 1999, “Adaptive Vibration Control by a Variable-Damping Dynamic Absorber Using ER Fluid,” ASME J. Vibr. Acoust., 121, July, pp. 373–378.
Oh,  H.-U., Onoda,  J., and Minesugi,  K., 2000, “Characteristics of a Liquid-Crystal Type ER-Fluid Variable Damper for Semiactive Vibration Suppression,” ASME J. Vibr. Acoust., 122, October, pp. 412–419.
Gavin,  H. P., 2001, “Control of Seismically-Excited Vibration Using Electrorheological Materials and Lyapunov Methods,” IEEE Trans. Control Syst. Technol., 9(1), January, pp. 27–36.
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Figures

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Performance comparison of the semiactive (cmin=0.1 N sec/m) and passive systems
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Simple model for numerical simulation
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Comparison of measured datas (exciting frequencies=1 and 3 Hz) with the simulated datas from the equivalent model as shown in Fig. 4
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Equivalent model of the isolator with liquid-crystal type ER fluid
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Estimated values of c as a function of input voltage
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Elongation(d)-Load(p) relation measured in dynamic tests of the isolator filled with liquid-crystal type ER fluid with various constant input voltages V (exciting frequency=3 Hz)
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Block diagrams for dynamic tests of ER isolator
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Cross-section of an ER isolator

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