Analysis and testing of an inner bypass magnetorheological damper for shock and vibration mitigation

2013 ◽  
Author(s):  
Xian-Xu Bai ◽  
Wei Hu ◽  
Norman M. Wereley
Keyword(s):  
Magnetorheological Damper ◽  
Vibration Mitigation

A hybrid model of magnetorheological dampers based on generalized hysteretic biviscous operators

2018 ◽  
Vol 29 (14) ◽  
pp. 2979-2985 ◽  
Author(s):  
Xinlong Zhao ◽  
Shuangjiang Wu ◽  
Haipeng Pan
Keyword(s):  
Particle Swarm Optimization ◽  
Hybrid Model ◽  
High Performance ◽  
Parametric Models ◽  
Magnetorheological Damper ◽  
Magnetorheological Dampers ◽  
Swarm Optimization ◽  
Vibration Mitigation ◽  
Modified Particle Swarm Optimization ◽  
Control Devices

Magnetorheological dampers are promising vibration control devices that are widely used for vibration mitigation applications. However, due to the inherent hysteresis of magnetorheological dampers, achieving high performance is a challenging issue because it requires the development of models that can accurately describe the unique characteristics of this hysteresis. In this article, first, a generalized hysteretic biviscous operator is proposed to roughly describe the hysteretic property. Then, the superposition of the weighted generalized hysteretic biviscous operators is performed to model the magnetorheological damper, and modified particle swarm optimization is utilized to regulate the weights. This methodology provides the hybrid model with the advantages of both parametric and non-parametric models. Moreover, the model has a rather simple architecture and can be easily determined. The experimental results demonstrate the feasibility of the proposed method.

A Magnetorheological Damper with Bifold Valves for Shock and Vibration Mitigation

2007 ◽  
Vol 18 (12) ◽  
pp. 1227-1232 ◽  
Author(s):  
Min Mao ◽  
Wei Hu ◽  
Young-Tai Choi ◽  
Norman M. Wereley
Keyword(s):  
Magnetorheological Damper ◽  
Vibration Mitigation

Magnetorheological damper in semi-active vehicle suspension system using SDRE control for a quarter car model

2018 ◽  
Author(s):  
Maria Aline Gonçalves ◽  
Rodrigo Tumolin Rocha ◽  
Frederic Conrad Janzen ◽  
José Manoel Balthazar ◽  
Angelo Marcelo Tusset
Keyword(s):  
Suspension System ◽  
Magnetorheological Damper ◽  
Vehicle Suspension ◽  
Quarter Car Model ◽  
Car Model ◽  
Quarter Car ◽  
Vehicle Suspension System ◽  
Active Vehicle Suspension System

scholarly journals Influence of Eccentricity and Angular Velocity on Force Effects on Rotor of Magnetorheological Damper

2018 ◽  
Vol 180 ◽  
pp. 02091
Author(s):  
Dominik Šedivý ◽  
Petr Ferfecki ◽  
Simona Fialová
Keyword(s):  
Magnetic Induction ◽  
Magnetorheological Damper ◽  
Squeeze Film ◽  
Fluid Viscosity ◽  
Squeeze Film Damper ◽  
Viscous Forces ◽  
Angular Velocities ◽  
Volume Method ◽  
Gap Width ◽  
Made In

This article presents the evaluation of force effects on squeeze film damper rotor. The rotor is placed eccentrically and its motion is translate-circular. The amplitude of rotor motion is smaller than its initial eccentricity. The force effects are calculated from pressure and viscous forces which were measured by using computational modeling. Damper was filled with magnetorheological fluid. Viscosity of this non-Newtonian fluid is given using Bingham rheology model. Yield stress is not constant and it is a function of magnetic induction which is described by many variables. The most important variables of magnetic induction are electric current and gap width between rotor and stator. The simulations were made in finite volume method based solver. The motion of the inner ring of squeeze film damper was carried out by dynamic mesh. Numerical solution was solved for five different initial eccentricities and angular velocities of rotor motion.

Effect Comparison of Zigzag Skew PM Pole and Straight Skew Slot for Vibration Mitigation of PM Brush DC Motors

2020 ◽  
Vol 67 (6) ◽  
pp. 4752-4761 ◽  
Author(s):  
Shanming Wang ◽  
Jianfeng Hong ◽  
Yuguang Sun ◽  
Haixiang Cao
Keyword(s):  
Vibration Mitigation ◽  
Dc Motors
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