Note: Vibration suppression using tunable vibration absorber based on stiffness variable magneto-rheological gel

Abstract

This paper proposes a novel adaptive tunable vibration absorber (TVA) based on a smart material the magnetorheological gel (MRG) to achieve a wide range of tonal vibration suppression on the primary system to protect any connected sensitive device. The vibration suppression performance of the MRG TVA was analyzed by conducting a modal test of the primary system under different magnetic fields. The experiment verified that the proposed MRG TVA can be controlled to produce 379% of stiffness change or 115% of tuning frequency under just 200 mT magnetic field. The proposed MRG TVA was found to possess a wider tuning frequency range than the TVA based on other smart material such as magnetorheological elastomer.

Analysis of Electrical Resistance and Impedance Change of Magnetorheological Gels with DC and AC Voltage for Magnetometer Application

“…The MRG samples in this work were manufactured using a hydrophilic gelatin base, which is the same material used in our previous paper [1]. The gelatin base was prepared by mixing 1 wt % of carrageenan(No.…”

“…Magnetorheological elastomers (MREs) and magnetorheological gels (MRGs) are smart materials with rheological properties that change depending on the strength of the externally applied magnetic field [1]. MREs are manufactured by mixing iron particles with a silicon or rubber base, whereas MRGs are composed of iron particles in gelatin-based materials [2,3].…”

“…It is possible to design a TVA that has a wider tuning range by using MRGs with a larger variation in stiffness in replacement of MREs. Shin et al [1] designed an MRG-based TVA with a stiffness change of 380% and a tuning range of 34.7–74.5 Hz under a magnetic field of 200 mT. Kim et al [12] proposed a hardware design and control algorithm for TVAs based on MRGs.…”

Semi-active vibration control of a transmission system using a magneto-rheological variable stiffness and damping torsional vibration absorber

“…Davis et al 7 proposed a piezoelectric semi-active torsional vibration absorber, which controlled the stiffness of piezoelectric ceramics by changing the electric field and ultimately achieved semi-active control of the natural frequency of the absorber. Kim et al 8,9 and Shin et al 10 proposed an adaptive tunable vibration absorber (ATVA) using MRE to robustly suppress harmonic vibration of a miniature cryogenic cooler under varying disturbance. Lee et al 11 designed a magneto-rheological elastomer flexible coupling whose torsional stiffness can be controlled by an embedded magnetic field generator, and torsional vibration experiments were conducted to validate the performance of the proposed magnetorheological elastomer coupling.…”

Modeling the non-linear rheological behavior of magnetorheological gel using a computationally efficient model

“…These features equip MR gel with great potentials in engineering applications, such as developing damper and vibration absorber. Till now, there are only a few works been done till now on the development of the MR gel devices [9][10][11] and the majority of the research on the MR gel focused on the preparation and characterization of the material. Zhang et al [12][13] have investigated the dynamic behaviors of MR gel with the various weight fractions of carbonyl-iron-particle using large-amplitude oscillation shear.…”