Development of a nonlinear adaptive absorber based on magnetorheological elastomer

Abstract

The resonance shift property of magnetorheological elastomer is important for developing adaptive absorbers. However, it is well-known that passive nonlinear absorbers have wider effective frequency bandwidths. This article combines these two characteristics in order to develop a hybrid magnetorheological elastomer absorber which can shift its natural frequency and has a wider absorption bandwidth under each constant current. The adaptability and nonlinearity were fully verified experimentally. Afterwards, the absorption ability of the hybrid magnetorheological elastomer absorber was investigated and analyzed. The results show that the effective bandwidth of this absorber is broadened under certain levels of current than linear absorber, and this is caused by the presence of nonlinearity; and the adaptability induced by the magnetorheological elastomer undoubtedly empowers the absorber possible to trace the excitation frequency changing in real time. A short-time Fourier transform was finally used to control the magnetorheological elastomer absorber to verify its controllability, showing that an optimal absorption transmissibility was achieved by the controlled hybrid absorber.

Magnetorheological elastomers — An underestimated class of soft actuator materials

“…Various research groups investigated the change of the mechanical properties of different MRE materials under the influence of the magnetic field (Bo¨se 2007;Bo¨se and Ro¨der, 2009;Cantera et al, 2017;Gordaninejad et al, 2012;Li and Nakano, 2013;Tian et al, 2013;Ubaidillah et al, 2015;Zhou, 2003). In other studies, interesting applications of MRE in terms of vibration reduction were described (Deng and Gong, 2007;Li et al, 2012;Sun et al, 2018;Tao et al, 2018;Wang et al, 2017;Yang et al, 2013;Zhang and Li, 2009). In some recent review articles, an overview on materials properties and possible applications was given (Li et al, , 2014Liu and Xu, 2019).…”

“…The increase of stiffness of MRE in the magnetic field is exploited primarily for vibration attenuation. Various papers describe devices, in which MR elastomers are used for damping purposes (Deng and Gong, 2007;Li et al, 2012;Sun et al, 2018;Tao et al, 2018;Wang et al, 2017;Yang et al, 2013;Zhang and Li, 2009). A special approach is the application of magnetorheological elastomers in tunable vibration absorbers (Deng and Gong, 2007;Wang et al, 2017;Zhang and Li, 2009).…”

Magnetorheological Elastomers: Materials and Applications

“…After that, the research on vibration MRE-based absorbers developed quickly (e.g., Refs. [13,[108][109][110][111][112]). Figure 15 shows the sketch of a designed MRE-based vibration absorber composed of a semi-active vibration absorption unit and a passive vibration isolation unit.…”

Smart and Functional Soft Materials

“…After that, the research on vibration MRE-based absorbers developed quickly (e.g., Refs. [13,[108][109][110][111][112]). Figure 15 shows the sketch of a designed MRE-based vibration absorber composed of a semi-active vibration absorption unit and a passive vibration isolation unit.…”