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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Cross-section of an ER isolator
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Block diagrams for dynamic tests of ER isolator
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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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Estimated values of c as a function of input voltage
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Equivalent model of the isolator with liquid-crystal type ER fluid
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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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Simple model for numerical simulation
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Performance comparison of the semiactive (cmin=0.1 N sec/m) and passive systems




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