EVACES 2017: Experimental Vibration Analysis for Civil Structures pp 557-567 | Cite as
An Analytic Comparison Regarding Steady-State Damping Performance Between the Twin Rotor Damper and a Dynamic Vibration Absorber
Abstract
A novel active mass damper, the twin rotor damper (TRD), was presented in previous research, including control algorithms for monofrequent vibrations. In this paper, the steady-state damping performance is evaluated by applying a harmonic excitation force to a single degree of freedom (SDOF) oscillator with and without the action of the damping device. Using the velocity of the SDOF oscillator as feedback, adequate steady-state damping performance can be achieved with the TRD by setting the control force of the TRD in antiphase to the velocity of the SDOF oscillator. An analytic solution describing the steady-state damping performance is derived. The analytic solution allows for the comparison with a dynamic vibration absorber (DVA) of comparable size (stroke) and control mass. The analytic comparison shows that the TRD achieves greatly better damping performance than the DVA.
Keywords
Twin rotor damper Active vibration control Closed-loop control Steady-state damping performance Frequency-ratio dynamic-amplification relation Dynamic vibration absorberReferences
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