Study of the response time of MR dampers

Guan, Xinchun; Guo, Pengfei; Ou, Jinping

doi:10.1117/12.840217

Cited by 17 publications

(13 citation statements)

References 6 publications

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“…Guan et al . experimentally investigated the response time of a large‐scale MR damper at different velocities (in the range 1–4 cm/s) and currents (0.0–1.2 A), highlighting the electromagnetic response as the predominant factor influencing such delays, also demonstrating that lesser eddy current leads to a fast response. They define the response time as the time span needed to achieve 63% of the desired total variation of the force in the damper.…”

Section: Introductionmentioning

confidence: 99%

Promptness and dissipative capacity of MR dampers: Experimental investigations

Caterino

Spizzuoco

Occhiuzzi

2013

Struct. Control Health Monit.

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The experimental analyses of response time and dissipative capability of two prototype magnetorheological semi-active dampers are presented herein. These activities have been conducted during an Italian research project on devices manufactured in Germany. A detailed report of the response time analysis based on experimental data is presented and commented. It is shown how the control delays are strongly dependent on the effectiveness of the electric part of the control hardware, generally being less than 10 ms if special care is paid in designing the whole control chain. The dissipative capacity of the devices is further analyzed under the action of different imposed displacement laws, investigating a large range of displacement amplitudes, frequencies, and feeding currents. Interesting comparisons in terms of energy are finally drawn between magnetorheological damper used in a passive (constant current) and in a semi-active mode (variable current commanded by an energy-based control logic)

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Section: Introductionmentioning

confidence: 99%

Promptness and dissipative capacity of MR dampers: Experimental investigations

Caterino

Spizzuoco

Occhiuzzi

2013

Struct. Control Health Monit.

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“…Eddy currents in the coil core Guan et al (2009) found out that between the course of electric current and the course of MR damper force, there is a time lag. They explained this lag as a result of eddy currents induced in the magnetic circuit.…”

Section: Inductance Of Mr Damper Coilmentioning

confidence: 99%

Design of magnetorheological damper with short time response

Strecker

Roupec

Mazůrek

et al. 2015

Journal of Intelligent Material Systems and Structures

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For efficient fast control of suspension systems with magnetorheological dampers controlled by semi-active algorithms, the time response of the magnetorheological damper is one of the most important parameters which influences the performance of the suspension system. The time response of commercial magnetorheological dampers with common controllers is in the range of tens of milliseconds, which is too long for efficient real-time control of car suspension. This article describes the ways how to design magnetorheological damper with short response time. First part describes the elimination of long time response caused by high inductance of electrical circuit of magnetorheological damper using current controller. The second part describes elimination of long time response caused by eddy currents which are induced in the magnetic circuit of magnetorheological damper. The new piston of the magnetorheological damper is designed from material with high relative permeability but low electrical conductivity (ferrite). The time responses of magnetic induction and damper forces were measured and compared to original commercial Delphi damper. Results showed rapid improvement in time response when the current controller is used and when the piston is constructed from ferrite materials.

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“…18 The response time is often neglected in simulations, 19 but in Strecker et al, 20 12 and Koo et al 21 experimentally proved that the use of current controller instead of the voltage power source significantly reduces the rise time of the current to the desired value. Eddy currents in the magnetic circuit: Guan et al 22 noticed that the MR damper force rise, after the step of electric current to the coil, is much longer compared to the course of electric current. This delay was explained as a result of eddy currents, which are generated during fast changes of electric current in the coil.…”

Section: Introductionmentioning

confidence: 99%

Influence of response time of magnetorheological valve in Skyhook controlled three-parameter damping system

Strecker

Roupec

Mazůrek

et al. 2018

Advances in Mechanical Engineering

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A three-parameter suspension system is often used for vibration isolation of sensitive devices especially in a space industry. This article describes the three-parameter suspension system with magnetorheological valve controlled by Skyhook algorithm. Simulations of such systems showed promising results. They, however, showed that the suspension performance is strongly influenced by magnetorheological valve response time. Results from simulations proved that the semiactive control of such system with response time of magnetorheological damper up to 4 ms outperforms any passive setting. The simulations were verified by an experiment on suspension system with magnetorheological valve with response time between 3.5 and 4.1 ms controlled by a Skyhook algorithm. Although the control algorithm was slightly modified in order to prevent instabilities of control loop caused by signal noise, the results from the experiment showed the same trends like the simulations.

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Study of the response time of MR dampers

Cited by 17 publications

References 6 publications

Promptness and dissipative capacity of MR dampers: Experimental investigations

Promptness and dissipative capacity of MR dampers: Experimental investigations

Design of magnetorheological damper with short time response

Influence of response time of magnetorheological valve in Skyhook controlled three-parameter damping system

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