Damping performance analysis of magnetorheological damper with serial-type flow channels

Hu, Guoliang; Líu, Hao; Duan, Jinfu; Yu, Lie

doi:10.1177/1687814018816842

Cited by 20 publications

(12 citation statements)

References 21 publications

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“…The same principle can be realized by guiding the magnetic flux without the added complexity of two or more coil assemblies in the electromagnet. The concept in Figure 8b presented in [83] adds the extra active section to the annulus with just one coil assembly. Note, however, that the flow path's U-turn will augment the flow losses, and the flux will travel across four air gaps as in the parallel path structure.…”

Section: Extended Dynamic Range: Multiple Serial Polesmentioning

confidence: 99%

Review: A Survey on Configurations and Performance of Flow-Mode MR Valves

et al. 2022

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Magnetorheological (MR) actuators are semi-active devices controlled by magnetic stimuli. The technology has been commercialized in the automotive industry or high-quality optical finishing applications. It harnesses the rheology of smart fluids to result in the unique application of the material. By a wide margin, the most common example of an MR actuator is a flow-mode single-tube housing with a control valve (electromagnet with a fixed-size air gap filled with the MR fluid) operating in a semi-active vibration control environment. The analysis of the prior art shows that the developed configurations of MR valves vary in size, complexity, the ability to generate adequate levels of pressure, and the interactions with the MR fluid’s rheology resulting in various performance envelopes. Moreover, miscellaneous testing procedures make a direct valve-to-valve comparison difficult. Therefore, in this paper we present a detailed and systematic review of MR control valves, provide classification criteria, highlight the operating principle, and then attempt to categorize the valves into groups sharing similarities in the design and performance envelope(s). Moreover, a simple performance metric based on the shear stress calculation is proposed, too, for evaluating the performance of particular valving prototypes. In the review, we discuss the key configurations, highlight their strengths and weaknesses and explore various opportunities for tuning their performance range. The review provides complementary information for the engineers and researchers with a keen interest in MR applications, in general. It is an organized and and critical study targeted at improvements in the categorization and description of MR devices.

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Section: Extended Dynamic Range: Multiple Serial Polesmentioning

confidence: 99%

Review: A Survey on Configurations and Performance of Flow-Mode MR Valves

et al. 2022

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“…However, the traditional MR damper is unable to provide large damping forces under dimensional constraints due to the simple structure with low utilization rate of magnetic field and gap. Facing this challenge, strides have been made continuously on the structural design of the MR damper mainly focusing on the improving the magnetic supply system [19][20][21][22][23], selecting the working mode of the MR fluid [24][25][26] and optimizing the flow channel layout [27][28][29][30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

“…The experimental damping force reaches 3150 N, and the equivalent damping force was more than twice that of the traditional MR damper. Hu et al [34] proposed, manufactured and tested an MR damper with serial-type flow channels, which had multiple axial annular channels. The maximum positive damping force reaches 5486 N and the dynamic adjustable range reaches to 7.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Magnetorheological Damper with Folded Resistance Gaps and Bending Magnetic Circuit

Liu

Zhou

et al. 2022

Actuators

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The traditional magnetorheological (MR) damper subject to the limited space has shortcomings such as small damping force, narrow dynamic range and low adaptability. In this study, a new MR damper with folded resistance gaps and bending magnetic circuit was proposed for improving the damping performance. The length of the resistance gap was increased by configuring the multi-stage folded annular gap structure, and the magnetic circuit was established to activate the non-flux region. The mathematical model was established for the MR damper to analyze the damper force, magnetic circuit and dynamic performance. Subsequently, the finite element analysis (FEA) methodology was utilized to investigate the changes of magnetic flux densities in the folded resistance gaps. The test rig was setup to explore and verify the dynamic performance of the proposed MR damper under different excitation conditions. The results indicate the maximum damping force is approximately 4346 N at the current of 1.5 A, frequency of 0.25 Hz and amplitude of 7.5 mm. The damping force and dynamic range of the proposed MR damper are enhanced by 55.82% and 62.21% compared to that of the traditional MR damper at the applied current of 1.5 A, respectively, thus highlighting its high vibration control ability.

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“…Cheng et al [19] designed an MR damper with a magnetic winding and the damping force attained 3.4 kN under the sinusoidal velocity excitation with amplitude of 0.0628 m/s. To extend the effective gap length of the MR fluid channels, Hu et al [20] proposed an improved MR damper on the premise of a restrained structural dimension, utilizing three non-conducting magnetic sleeves and four conducting magnetic sleeves to divide a single MR fluid flow channel into a serial-type MR fluid flow channel. The experimental results illustrate the peak damping force equals 6.8 kN and the equivalent damping coefficient reaches 290 kN/sm -1 .…”

Section: Introductionmentioning

confidence: 99%

Development and Evaluation of a MR Damper With Enhanced Effective Gap Lengths

Feng

Tong

et al. 2020

IEEE Access

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Traditional magnetorheological (MR) damper featuring fixed gaps has the shortcomings of small damping force, single dynamic performance, and low adaptability. To overcome these shortcomings, a new MR damper with enhanced effective gap lengths is developed in this work, which achieves a double extension of the effective gap lengths via compactly integrating the conical fluid channels into the annular fluid channels. On the other hand, by altering the axial position of the valve spool controlled by a locking nut, the relative distance between the valve spool and piston of the MR damper is flexibly regulated; thus, the width of this adjustable gap in the conical fluid channels can be continuously adjusted. The magnetic circuit of the proposed MR damper is developed and its mechanical model is established as well to evaluate the dynamic performance. Sequentially, the finite element analysis (FEA) methodology is applied by using ANSYS/Emag software to investigate the changes of magnetic flux densities in these adjustable gaps. Moreover, a prototype is manufactured and experimental tests are conducted to verify its dynamic performance. The experimental results, under a fixed applied current, indicate that the damping force decreases with the increase of the adjustable gaps, and the maximum damping force reaches 7.2 kN at the adjustable gap of 0.6 mm. Besides, the dynamic range increases with the increase of the adjustable gap, and the dynamic range appears with a peak of 13.6. In addition, the damping force varies from 0.2 kN to 7.2 kN while the dynamic range attains 33 correspondingly by regulating the applied current and adjustable gap from 1.6 mm to 0.6 mm. From an experimental results perspective, the damping force and dynamic range can be not only effectively controlled by excitation current but also flexibly altered by regulating the width of the adjustable gaps simultaneously. Therefore, the dynamic performance of the proposed MR damper is also enhanced.

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Damping performance analysis of magnetorheological damper with serial-type flow channels

Cited by 20 publications

References 21 publications

Review: A Survey on Configurations and Performance of Flow-Mode MR Valves

Review: A Survey on Configurations and Performance of Flow-Mode MR Valves

Performance Analysis of Magnetorheological Damper with Folded Resistance Gaps and Bending Magnetic Circuit

Development and Evaluation of a MR Damper With Enhanced Effective Gap Lengths

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