Performance evaluation of passive and semi-active magnetorheological dampers

Lee, Sang‐Hyun; Park, Jihun; Lee, Sung-Kyung; Youn, Kyung-Jo; Kang, Min

doi:10.1007/bf03027068

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…However, time delays and valve dynamics have been found to significantly affect the damper performance. In recent years, semi-active dampers using a functional fluid, such as magneto-rheological or electro-rheological (ER) fluids, have been widely studied to control the damping force of dampers by replacing the mechanical valves that commonly are used in adjustable dampers [4,5]. The performance of an MR or ER damper has been evaluated for various applications, especially to attenuate undesirable vibration.…”

Section: Introductionmentioning

confidence: 99%

A study on the efficiency improvement of a passive oil damper using an MR accumulator

2010

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This study describes the development, modeling, and testing of a hybrid damper for semi-active suspension. The goal of this study is to improve the performance of conventional passive oil dampers using a magneto-rheological (MR) accumulator that consists of a gas accumulator and an MR device. The level of damping is continuously variable by means of control of the applied current in an MR device that is fitted to a floating piston that separates the gas and oil chamber. A small MR device is used to resist the movement of the floating piston. At first, a mathematical model that describes all flows within the damper is formulated and developed in Matlab/Simulink. The MR device is also devised. A mathematical model is adopted to characterize the performance of the device. The formulas derived for the different components of the damper force are combined into a full damper model. Then, the applicability of the MR device to a conventional passive oil damper is tested in a manufactured test environment and evaluated in terms of the damping force vs. the piston velocity. From the results, it is possible to ascertain the MF device's capability to work as a damper that can supply a variable damping force. Moreover, this research affords a lot of new information about the applicability of MR devices and improvement of the damping force.

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Section: Introductionmentioning

confidence: 99%

A study on the efficiency improvement of a passive oil damper using an MR accumulator

2010

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“…The MR damper has a property of the friction damper so that the relative magnitude of the friction force over excitation intensity [1] affects the control performance. The simulation work is done on semi active suspension system by using the MR damper as actuator to vary the damping properties of suspension system and to minimize the settling time [2].…”

Section: Introductionmentioning

confidence: 99%

Experimental investigations of damping characteristic for MR strut by half-power bandwidth method

Yerrawar¹,

Arakerimath²

2018

J. meas. eng.

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In today's automobile, each and every part of vehicle must consider the vibration management. Damping and isolation are the two aspects of vibration management which uses in conjunction to attain the required performance. The Logarithmic decrement method and Bandwidth method are the two major methods for measurement of damping in vibration system. Time domain method is used in Logarithmic decrement whereas the Half power bandwidth method is used in frequency domain analysis. In the present work, quarter car model is used to determine the frequency response analysis of Magnetorheological damper strut. The sprung mass is varying from 82 kg to 132 kg and excitation force is given by cam mechanism which is designed as per the bump size specified by Indian Road Congress (IRC) standard. The fabricated MR damper is tested at different sprung mass with input current from 0.1 A to 0.5 A. It is observed that the damping ratio is varying from 0.04 to 0.21. The results obtained in this paper will be helpful for the Indian auto industry to make more economical and reliable damper strut.

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Tribe–charged system search for parameter configuration of nonlinear systems with large search domains

Talatahari

Motamedi

Azar

et al. 2019

Engineering Optimization

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Performance evaluation of passive and semi-active magnetorheological dampers

Cited by 4 publications

References 3 publications

A study on the efficiency improvement of a passive oil damper using an MR accumulator

A study on the efficiency improvement of a passive oil damper using an MR accumulator

Experimental investigations of damping characteristic for MR strut by half-power bandwidth method

Tribe–charged system search for parameter configuration of nonlinear systems with large search domains

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