A new modular magnetorheological fluid valve for large-scale seismic applications

Wang, Xiaojie; Gordaninejad, Faramarz; Hitchcock, Gregory H.; Bangrakulur, K.; Fuchs, Alan; Elkins, J.; Evrensel, Cahit A.; Dogruer, Umit; Ruan, S.; Siino, Mike; Kerns, Mary Q.

doi:10.1117/12.540275

Cited by 16 publications

(15 citation statements)

References 7 publications

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“…Changing the structure of a bypass valve, the damper can be applied in di erent elds without other redesign, which signi cantly simpli es the development processes and reduces the cost of development. Usually, valves in the damper body are utilized so that the damper will be still operated in a passive mode if a bypass valve is in a state of failure [9,34,72,73]. However, an e ective length of damping channels is still limited in a miniature bypass valve.…”

Section: One or More Coils Installed In A Bypass Valvementioning

confidence: 99%

A Review on Structural Development of Magnetorheological Fluid Damper

Tian

Ling

et al. 2019

Shock and Vibration

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Owing to unique advantages, magnetorheological fluid (MRF) dampers have been widely adopted in different fields of vibration control. Significant differences of structures occur in diverse fields due to the respective requirements, thus obtaining a large number of MR dampers. Having a good understanding of types, technical characteristics, comprehensive performance, and developing trend and their dependencies on structures are extremely conducive to innovative developments and a market selection. While the fundamental and partial structures are summarized in an existing review, the classification, latest technologies, and developing trend are not involved clearly. Therefore, the current survey aims at a comprehensive supplement in such aspects. The review begins with an introduction of the development, application, and classification. Then, details of three technical routes are revealed, and the development of each type is roughly analyzed. Finally, reflecting through this review, structures including a novel flow mode and miniature bypass valves have represented the currently structural and technical features. Fully considering the latest technologies and future requirements, the developing trend and a variety of applications will be anticipated.

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Section: One or More Coils Installed In A Bypass Valvementioning

confidence: 99%

A Review on Structural Development of Magnetorheological Fluid Damper

Tian

Ling

et al. 2019

Shock and Vibration

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“…A radial flow path of the MR valve was employed since it can generate a higher MR resistance for a given valve length as compared with that for two concentric cylinders in an annular configuration. 27 A twin-tube MR damper was designed in this project; a schematic diagram of the design is shown in Figure 1. There are two reservoirs in the MR damper: an inner reservoir and an outer reservoir.…”

Section: Mr Damper Mr Damper Designmentioning

confidence: 99%

“…The viscous pressure drop for the MR fluid flowing through parallel disks can be written as 27,29 rP vis,dis…”

Section: Theoretical Analysismentioning

confidence: 99%

Twin-tube- and bypass-containing magneto-rheological damper for use in railway vehicles

Guo

Gong

Zong

et al. 2013

Proceedings of the Institution of Mechanical Engineers, Part F:

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A 9-kN magneto-rheological (MR) damper for lateral suspension control of a railway vehicle is created in this paper. The twin-tube style is adopted in order to obtain a long damper stroke and guarantee the symmetry of the output damping force. A bypass MR valve with a radial flow path is utilised to control the generated damping force. Three-dimensional finite element analysis studies are performed to determine the magnetic field strength inside the MR valve region. The MR damper is mathematically modelled for the situation of a unidirectional fluid flow in the chamber and valve. The test results indicate that the MR damper can produce a considerable range of dynamic force and can operate as a fail-safe device. Sedimentation is detected in the damper; however, the response time is acceptable for real-world deployment.

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“…The fundamental principle of the MR damper is similar to that of the conventional passive damper, which dissipates kinetic energy as heat through the flow restriction mechanism. The restriction of the fluid flow generates a reaction force perceived as a damping force [7,[22][23][24][25]. In the conventional passive damper, the flow restriction is caused by the piston orifice acting as a fixed valve.…”

Section: Introductionmentioning

confidence: 99%

A Concentric Design of a Bypass Magnetorheological Fluid Damper with a Serpentine Flux Valve

Idris¹,

Imaduddin

Ubaidillah

et al. 2020

Actuators

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This work presents a new concentric design structure of a bypass magnetorheological (MR) damper with a serpentine flux valve type. In this design, the serpentine valve is installed not in the middle of the piston but on the bypass channel of the damper. However, to make it less bulky, the location of the valve installation is chosen to be in line with the cylinder axis, which is different from the common configuration of the bypass damper. With the proposed design concept, the performance flexibility of the bypass configuration and the compactness of the piston valve configuration can be accomplished. In this study, these benefits were demonstrated by firstly deriving an analytical model of the proposed MR damper focusing on the bypass concentric valve structure, which is vital in determining the damping force characteristics. The prototype of MR damper was also fabricated and characterized using the dynamic test machine. The simulation results show that the damping force could be adjusted from 20 N in the off-state to around 600 N in the on-state with 0.3 A of excitation current. In the experiments, during low piston velocity measurement, the on-state results from the simulation were generally in good agreement with the experimental results. However, with the increase in piston velocity, the deviation between the simulation and the experiment gets higher. The deviations are most probably due to seal frictions that were not accounted for in the model. The seal friction is probably dominant as the seals in the prototype need to be prepared for handling higher fluid pressure. As a result, the frictions are quite prevalent and significantly affect the measured off-state damping forces as well, where it was recorded ten times higher than the predicted values from the model. Nevertheless, although there were deviations, the dynamic range of the concentric bypass structure is still 1.5 times higher than the conventional structure and the new structure can be potentially explored more to achieve an improved MR damper design.

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A new modular magnetorheological fluid valve for large-scale seismic applications

Cited by 16 publications

References 7 publications

A Review on Structural Development of Magnetorheological Fluid Damper

A Review on Structural Development of Magnetorheological Fluid Damper

Twin-tube- and bypass-containing magneto-rheological damper for use in railway vehicles

A Concentric Design of a Bypass Magnetorheological Fluid Damper with a Serpentine Flux Valve

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