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

A semiactive isolator filled with liquid-crystal type electro-rheological (ER) fluid was developed to attenuate the disturbances generated by a momentum-wheel and to improve pointing performance. The principal characteristics of an ER isolator were measured in dynamic tests, and a mathematical model...

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Veröffentlicht in:	Journal of vibration and acoustics 2004-04, Vol.126 (2), p.272-277
Hauptverfasser:	Oh, Hyun-Ung, Onoda, Junjiro, Minesugi, Kenji
Format:	Artikel
Sprache:	eng
Schlagworte:	Acoustics Exact sciences and technology Fundamental areas of phenomenology (including applications) Physics Solid mechanics Structural acoustics and vibration Structural and continuum mechanics Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...)
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Beschreibung
Zusammenfassung:	A semiactive isolator filled with liquid-crystal type electro-rheological (ER) fluid was developed to attenuate the disturbances generated by a momentum-wheel and to improve pointing performance. The principal characteristics of an ER isolator were measured in dynamic tests, and a mathematical model of the isolator was proposed. Two control laws for a semiactive approach were proposed. Numerical simulation results indicated that the proposed semiactive control system produced much better isolation performance than a passive system.
ISSN:	1048-9002 1528-8927
DOI:	10.1115/1.1646418