Abstract
The studied damper can be modeled as a variable coulomb-friction damper. The friction in the damper is not zero, even when no voltage is applied to the electrode of the damper, and is an increasing function of the absolute value of the voltage. Semiactive vibration suppression exploits this variation of friction. To suppress large-amplitude vibrations to small-amplitude ones effectively, we need to vary the friction over a large range. In other words, the ratio of the maximum and minimum values of the frictional force needs to be large. An investigation of decreasing the minimum frictional force by vibrating the electrode of the damper to increase this ratio is reported. The effectiveness of the electrode vibration was demonstrated in static experiments, as well as in semiactive vibration suppression experiments, indicating that electrode vibration reduces the minimum frictional force by 1/3-1/2 without changing the maximum frictional force, thereby greatly reducing the vibration amplitude.
Published Version
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