A smart dynamic vibration absorber for suppressing the vibration of a string supported by flexible beams

Abstract

This study aims to effectively and robustly suppress the vibration of tension-stabilized structures (TSSs) using a smart dynamic vibration absorber (DVA). In recent years, a strong need has emerged for high-precision and high-functionality space structural systems for realizing advanced space missions. TSSs have attracted attention in this regard as large yet lightweight structural systems with high storage efficiency. A fundamental issue in the application of TSSs is vibration control of strings, of which TSSs are predominantly composed. In particular, the suppression of microvibrations is difficult because the deformation is almost perpendicular to the direction of vibration. A DVA is an effective device for suppressing microvibrations. However, the damping performance is sensitive to changes in dynamic properties. Furthermore, aging degradation and temperature dependence negatively affect DVA performance. This study aimed to develop a smart, active DVA with self-sensing actuation to improve robustness. A small cantilever with a piezoelectric transducer was utilized as a smart DVA. Numerical simulations and experiments showed that a passive DVA and the smart DVA suppressed vibrations but that the smart DVA showed improved effectiveness and robustness.

Damping Performance of Dynamic Vibration Absorber in Nonlinear Simple Beam with 1:3 Internal Resonance

“…After dropping the DVA from the equation of motion in the previous section, we obtain the following: (13) In this model, the two ends are hinged; therefore, the boundary conditions are…”

“…They found that placing a DVA of appropriate mass could prevent internal resonance and suppress vibrations in the beam. Nambu et al 13 studied the smart self-sensing active DVA attached on a flexible beams supported string. A small cantilevered piezoelectric transducer was used to realize this active DVA.…”

Principle, modeling, and control of a magnetorheological elastomer dynamic vibration absorber for powertrain mount systems of automobiles

“…DVAs with a controllable natural frequency range are widely developed to meet the requirements of the shift-frequency vibration absorption. The elastic elements of DVAs are often synthesized using smart materials, such as magnetorheological (MR) materials, electrorheological (ER) materials, and piezoelectric ceramics (Anh and Nguyen, 2016;Davis and Lesieutre, 2000;Nambu et al, 2014;Thompson, 1981). Magnetorheological elastomers (MREs) are one kind of MR materials based on nonmagnetic elastic matrices filled with micro-sized magnetizable particles (Jolly et al, 1998).…”

Vibration attenuation in two-link flexible mechanical arms with periodic composite materials

“…For instance, in some ''fast-speed moving'' or ''high precision need'' working conditions, much additional time should be spent to eliminate the vibration. [9][10][11] In the self-propelled howitzer (SPH), the flexible mechanical arms system is applied to the device which used to auto-load. The vibration caused by the impact of bullet and the recoil of howitzer would affect the whole circulation time in loading and decrease the firing rate of SPH.…”