ER dampers in vibroprotection systems of precision equipment

Evguenia V. Korobko; Zinovy P. Shulman; Leonid N. Danilevski

doi:10.1117/12.310689

16 June 1998 ER dampers in vibroprotection systems of precision equipment

Evguenia V. Korobko, Zinovy P. Shulman, Leonid N. Danilevski

Proceedings Volume 3327, Smart Structures and Materials 1998: Passive Damping and Isolation; (1998) https://doi.org/10.1117/12.310689
Event: 5th Annual International Symposium on Smart Structures and Materials, 1998, San Diego, CA, United States

Abstract

The increased requirements on the accuracy of measurements with the aid of large-weight electronic-optical devices have entailed heavy demands for their efficient protection against low-vibration vibrations produced by an occasional external load or operator's pushes. In these cases, the means of active protection against vibrations used, e.g., in adjustment stands are considered to be the most efficient ones. Among actuating mechanisms of such systems, i.e. hydro- and pneumohydraulic, electromechanical and friction devices, the viscous-friction dampers show much promise since use of electrorheological fluids in the latter allows their functional capabilities to be extended owing to control of the elastoviscous parameters of a working fluid. An analysis is made of vibrations of a single-mass system (an electronic microscope column) whose vibroprotection scheme includes four ER-dampers. Their control is accomplished by a voltage unit in discrete as well as in follow-up linear and logarithmic regimes. The results obtained are compared with experimental data for the systems without dampers, with passive dampers and controllable ER-dampers. The latter are shown to be advantageous, in particular, a three- fold decrease of the Q-factor of the system under forced vibration is reached in the optimum control.

Citation Download Citation

Evguenia V. Korobko, Zinovy P. Shulman, and Leonid N. Danilevski "ER dampers in vibroprotection systems of precision equipment", Proc. SPIE 3327, Smart Structures and Materials 1998: Passive Damping and Isolation, (16 June 1998); https://doi.org/10.1117/12.310689

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KEYWORDS

Control systems

Actuators

Amplifiers

Microfluidics

Transducers

Complex systems

Electrodes

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