“…Besides the increasing research on modeling of MRE, it has been applied broadly for intelligent devices in varies fields, such as vibration absorbers (Bian et al, 2018; Kumbhar et al, 2018; Qian et al, 2017; Xin et al, 2017; Yuan et al, 2019) and vibration isolators (Behrooz et al, 2014; Fu et al, 2019; Nguyen et al, 2018b; Yang et al, 2014; Yu et al, 2015) due to the frequency shifting property. Several control methods, such as on–off control (Yang et al, 2014), fuzzy control (Fu et al, 2018; Nguyen et al, 2018a), Lyapunov-based seismic control (Behrooz et al, 2014), H-infinity control (Yu et al, 2015) and sliding mode control (Nguyen et al, 2018b) have been employed in control systems based on MRE. Considering that the time delay in control systems may result in unsatisfied effect or system instability, the response time of MRE material was investigated (Zhu et al, 2018).…”