This paper describes a variable-damping dynamic absorber applying Electrorheological (ER) fluid to the damping element of a conventional-type dynamic absorber. A prototype of variable-damping dynamic absorber was constructed and its performance was verified with a three-story structural model. The special ability of the present dynamic absorber is to reduce the vibration amplitude at several frequencies by a single dynamic absorber. ER fluid is functional fluid whose yield shear stress can be changed by the applied electric field strength. Because of its peculiar property, ER fluid has been applied to various mechanical components such as shock absorbers and engine mounts for vehicles, clutches, valves, etc. One of the practical ways in applying ER fluid to mechanical components may be to expand the performance of conventional mechanical components by combining ER fluid effectively with them. In this sense, this paper shows a successful application of ER fluid to a conventional-type dynamic absorber. An adaptive neural network control system composed of a forward model network for system identification and a controller network was introduced to control the variable-damping element of the dynamic absorber. The numerical simulations show good agreements with the experimental results.
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July 1999
Research Papers
Adaptive Vibration Control by a Variable-Damping Dynamic Absorber Using ER Fluid
Shoshi Hidaka,
Shoshi Hidaka
Isuzu Advanced Engineering Center, Ltd., 8 Tuchidana, Fujisawa 252-8501 JAPAN
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Young Kong Ahn,
Young Kong Ahn
Department of Mechanical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501 JAPAN
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Shin Morishita
Shin Morishita
Department of Mechanical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501 JAPAN
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Shoshi Hidaka
Isuzu Advanced Engineering Center, Ltd., 8 Tuchidana, Fujisawa 252-8501 JAPAN
Young Kong Ahn
Department of Mechanical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501 JAPAN
Shin Morishita
Department of Mechanical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501 JAPAN
J. Vib. Acoust. Jul 1999, 121(3): 373-378 (6 pages)
Published Online: July 1, 1999
Article history
Received:
July 1, 1998
Revised:
December 1, 1998
Online:
February 26, 2008
Citation
Hidaka, S., Ahn, Y. K., and Morishita, S. (July 1, 1999). "Adaptive Vibration Control by a Variable-Damping Dynamic Absorber Using ER Fluid." ASME. J. Vib. Acoust. July 1999; 121(3): 373–378. https://doi.org/10.1115/1.2893990
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