Characteristics, Optimal Design, and Performance Analyses of MRF Damper

Abstract

Magnetorheological fluid (MRF) damper is one of the most promising semiactive devices for vibration control. In this paper, a shear-valve mode MRF damper for pipeline vibration control is proposed. The dynamic model and the state equation of the pipeline are established and the linear quadratic regulator (LQR) is used to generate the optimal damping force of MRF damper. The design concept considering the structure and the electromagnetic properties simultaneously is discussed in detail. A mathematical model of the relation between shear stress and control current based on interpolation method is established. Finite element analysis (FEA) software COMSOL is selected to simulate the magnetic field and electromagnetism-thermal field of the MRF damper. A computational method based on the simulation model is established to calculate the shear stress. In order to reduce the magnetic leakage, a method of adding magnetism-insulators at both ends of the piston head is presented. The influence of control current, displacement, and velocity on mechanical performance of the proposed MRF damper is experimentally investigated. The test results show that the performance of the MRF damper is basically identical with the theoretical prospective and the simulation conclusions, which proves the correctness and feasibility of this design concept.

An Improved Dynamics Modeling During Milling of the Thin-walled Parts Based on Magnetorheological Damping Fixture

“…By substituting the maximum milling force measured in Fig. 13 into formula (27), the maximum milling vibration acceleration can be calculated, as shown in Fig. 14 (b).…”

“…Bae et al [26] developed a magnetically tuned mass damper (mTMD) to suppress the vibration of a cantilever panel similar to satellite solar panels. Xin et al [27] put forward a shear valve mode MRF damper for pipeline vibration control. They made use of a linear quadratic regulator to study the optimal damping force of the MRF damper, and establishing a dynamic model and equation of state for the pipeline.…”

Design and modeling of a magnetorheological damper with double annular damping gap

“…Scholars such as Zhang et al (2017), Goldasz (2013), Gordaninejad et al (2010), and Lee et al (2002) used the controllable damping force at low velocity and the viscous damping force without a magnetic field for calculation. However, scholars such as De-kui et al (2018), Yarali et al (2019), Nie et al (2019), Huang et al (2017), andZhu et al (2016) used the controllable damping force at high velocity, and then added the viscous damping force without a magnetic field for calculation. The last approach was to use numerical methods to obtain the controllable damping force and then calculate the viscous damping force in the absence of a magnetic field.…”

Modeling and experimental evaluation of vibration reduction of hydraulic-driven joint with a MRF damper

“…Jiang et al (2016) of China University of Science and Technology researched and designed a MRF mechanical leg by combining MRF and torsion spring, which improves the adaptability of the robot leg to the ground. The dynamic model and the state equation of the pipeline are established and the linear quadratic regulator is used to generate the optimal damping force of MRF damper (De-kui et al, 2018). Ma et al (2021) applied the new inverse model of MRF damper to semi-active vibration control and optimization of semi-active suspension control method.…”