Design, Analysis, and Experimental Evaluation of a Double Coil Magnetorheological Fluid Damper

Passive electromagnetic devices for vibration damping and isolation are becoming a real alternative to traditional mechanical vibration and isolation methods. These types of devices present good damping capacity, lower cost, null power consumption, and higher reliability. In this work, a state-of-the-art review has been done highlighting advantages and drawbacks, application fields, and technology readiness level of most recent developments. In addition, a general introductory section relates presents key considerations that any engineer, electrical or mechanical, needs to know for a deep comprehension and correct design of these types of devices.

Section: Permanent Magnet-based Magnetorheological Dampersmentioning

confidence: 99%

Review of Passive Electromagnetic Devices for Vibration Damping and Isolation

Díez-Jiménez

Rizzo

Gómez-García

et al. 2019

“…In order to effectively supply the magnetic field to the MRF, any part of the magnetic circuit should not reach magnetic saturation before the MRF in the damping gap. Based on the magnetic flux conservation rule in closed magnetic circuit [33] and ignoring the magnetic flux leakage, then…”

Section: Magnetic Circuit Optimal Design Of Mrf Dampermentioning

confidence: 99%

Characteristics, Optimal Design, and Performance Analyses of MRF Damper

De-kui

Nie

et al. 2018

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.

“…By combining the results of the Bingham model with finite element analysis, they have identified the geometric dimension of the damper. As for the finite element optimization method, Ferdaus et al [18] and Hu et al [19] have explored the impact of different piston shapes on the performance of MR dampers by means of the finite element analysis method. It suggests optimization of the performances of MR dampers without changing its original structure on the basis of changing the internal geometric dimensions of that.…”

Section: Introductionmentioning

confidence: 99%

Design and Multiobjective Optimization of Magnetorheological Damper considering the Consistency of Magnetic Flux Density

Dong

Feng

Chen

et al. 2020

The consistency of magnetic flux density of damping gap (CMDG) represents the balancing magnetic flux density in each damping gap of magnetorheological (MR) dampers. It can make influences on the performances of MR dampers and the accuracy of relevant objective functions. In order to improve the mechanical performances of the MR damper with a two-stage coil, the function for calculating CMDG needs to be found. By establishing an equivalent magnetic circuit model of the MR damper, the CMDG function is derived. Then, the multiobjective optimization function and the working flow of optimal design are presented by combining the parallel-plate model of the MR damper with the function posed before. Taking the damping force, the dynamic range, the response time, and the CMDG as the optimization objective, and the external geometric dimensions of the SG-MRD60 damper as the bound variable, this paper optimizes the internal geometric dimensions of MR damper by using a NSGA-III algorithm on the PlatEMO platform. The results show that the obtained scheme in Pareto-optimal solutions has existed with better performance than that of SG-MRD60 scheme. According to the results of the finite element analysis, the multiobjective optimization design including the CMDG function can improve the uniformity of magnetic flux density of the MR damper in damping gap, which meets the requirements of manufacture and application.