Limiting factors of the response time of the magnetorheological damper

Strecker, Zbyněk; Roupec, Jakub; Mazůrek, Ivan; Klapka, Milan

doi:10.3233/jae-140006

Cited by 24 publications

(26 citation statements)

References 16 publications

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“…Therefore pressure lags in the above piston chamber due to the fluid stream through the base valve may occur; to avoid that phenomenon damping forces should be tuned [40]. Moreover, the time response of a MR damper could be limited by eddy currents in the coil's core, so an optimal design of the controller is often needed [41,42].…”

Section: Introductionmentioning

confidence: 99%

A Review on Parametric Dynamic Models of Magnetorheological Dampers and Their Characterization Methods

et al. 2018

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Magnetorheological (MR) fluids are capable of manifesting a rheological behaviour change by means of a magnetic field application and can be employed in many complex systems in many technical fields. One successful example is their use in the development of dampers: magnetorheological dampers (MRDs) are widespread in vibration control systems, as well as civil engineering applications (i.e., earthquake or seismic protection), impact absorption and vibration isolation technology in industrial engineering, and advanced prosthetics in biomedical fields. In the past, many studies have been conducted on MRDs modeling and characterization, but they have usually been focused more on the theoretical models than on the experimental issues. In this work, an overview of both of them is proposed. In particular, after an introduction to the physics of the magnetorheological effect, a short review of the main mathematical models of MRDs is proposed. Finally, in the second part of this study an overview of the main issues that occur in MRDs experimental characterization is reported and discussed.

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Section: Introductionmentioning

confidence: 99%

A Review on Parametric Dynamic Models of Magnetorheological Dampers and Their Characterization Methods

et al. 2018

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“…For response measurement, a patented current controller developed by our team was used instead of the common power supply. The controller drives the rise and drop of the current using the overvoltage technique described in [ 36 , 37 ]. The controller is supplied by a voltage of 30 V and the input signal is generated from a control computer.…”

Section: Methodsmentioning

confidence: 99%

“…Koo et al [ 35 ] measured the transient response of the LORD Motion Master automotive damper. The overall response time of the damper was identified in the range of 15–55 ms. Based on the previous study, Strecker et al [ 36 ] defined three main sources which prolong the response time: (i) MRF, (ii) electrical circuit—especially the coil inductance, and (iii) magnetic circuit. Subsequently, they designed a special current controller, minimizing the response time of the electrical circuit when switching on and also switching off [ 37 ] with the overvoltage method.…”

Section: Introductionmentioning

confidence: 99%

Novel Approaches to the Design of an Ultra-Fast Magnetorheological Valve for Semi-Active Control

et al. 2021

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This article presents a list of suitable techniques and materials leading to the design of an ultra-fast magnetorheological (MR) valve. Two approaches for achieving the short response time are proposed: (a) by means of material, and (b) by means of the shape. Within the shape approach, the revolutionary technique of 3D metal printing using a selective laser melting (SLM) method was tested. The suitability of the materials and techniques is addressed based on the length of the response time, which is determined by the FEM. The simulation results determine the response time of the magnetic flux density on the step signal of the current. Subsequently, the response time is verified by the measurement of the simple magnetorheological valve. The following materials were tested: martensitic stainless steel AISI 420A (X20Cr13), cutting steel 11SMn30, pure iron for SLM, Sintex SMC STX prototyping material, ferrite N87, and Vacoflux 50. A special technique involving grooves was used for preventing eddy currents on materials with a high electrical conductivity. The simulation and experimental results indicate that a response time shorter than 2.5 ms can be achieved using materials such as Sintex SMC prototyping, ferrite N87, and grooved variants of metal pistons.

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“…Effectively, the actuator dynamics of MR dampers is severely degraded. Specifically, the experiments by Strecker et al (2015) as well as Zheng et al (2015) showed again that the electromagnetic circuit plays a significant role in the eddy current–induced time delay. For example, Zheng et al (2015) designed a correcting circuit in order to accelerate the damper behavior.…”

Section: Introductionmentioning

confidence: 93%

Outlook on the dynamic behavior of an magnetorheological squeeze-mode damper prototype

Sapiński

Rosół

Jastrzębski

et al. 2017

Journal of Intelligent Material Systems and Structures

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Magnetorheological dampers have been useful tools in research and real-life projects in areas related to vibration damping and vibration isolation. At the same time, research data indicate that their transient performance is influenced by electromagnetic circuit characteristics, driving electronics, control approach, and fluid’s own dynamics. When compared to standard flow mode (valve mode), device squeeze-mode magnetorheological hardware featuring a control gap of varying height according to prescribed force or displacement is further complicated by both complex dynamics of the fluid flow and the electromagnetic circuit. As such, the primary purpose of this article is to provide an outlook on dynamic aspects of magnetorheological dampers operating in squeeze mode. In this study, the authors examined the transient behavior of a prototype damper subjected to mechanical and electrical stimuli. In particular, the work includes a comparison of the experimental results obtained for a damper subjected to voltage step inputs (open loop) and controlled inputs (closed loop), respectively. An attempt to extract magnetic flux data was performed, too. The results show that a proportional–integral–derivative controller allows for accelerating the current response time of the squeeze-mode actuator. However, observations of the flux preliminary data indicate that the transient performance of the device actuator is severely influenced by both piston position (control gap height) and current in the control coil. The results reveal that the electromagnetic circuit response is a major contributor to the actuator’s dynamics and a particular care needs to be undertaken in future projects to design an efficient magnetorheological squeeze-mode damper system.

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Limiting factors of the response time of the magnetorheological damper

Cited by 24 publications

References 16 publications

A Review on Parametric Dynamic Models of Magnetorheological Dampers and Their Characterization Methods

A Review on Parametric Dynamic Models of Magnetorheological Dampers and Their Characterization Methods

Novel Approaches to the Design of an Ultra-Fast Magnetorheological Valve for Semi-Active Control

Outlook on the dynamic behavior of an magnetorheological squeeze-mode damper prototype

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