Axial squeeze strengthen effect on rotary magneto-rheological damper

Dong, Xiaomin; Duan, Chi; Yu, Jianqiang

doi:10.1088/1361-665x/aa6a92

Cited by 3 publications

(2 citation statements)

References 29 publications

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“…In order to implement the squeeze strengthening, the additional apparatus are added to change the initial pressure of MR damper [33]. The results show that the reinforcing effect is remarkable with lower particle content of MR fluid [34]. What's more, the compressed MR fluids inside the cylinder can be regarded as the liquid spring to achieve the variable pressure [35].…”

Section: Introductionmentioning

confidence: 99%

Characteristic analysis under small-stroke and medium-high frequency of magneto-rheological damper with pressure controlled mechanism

Dong¹,

Li²,

Yan³

et al. 2022

Smart Mater. Struct.

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Due to the high frequency hardening effect in applications of satellite and precision vibration isolation, it is an urgent need to analyze and improve the magnetorheological (MR) performance of MR damper under small-stroke and medium-high frequency excitations. In this paper, a compact MR damper with pressure controlled mechanism is proposed, analyzed and tested. Considering the inertial, pre-compression and compressibility of MR fluid, the dynamic physic model is established to analyse the output characteristics with pre-compressions under small-stroke and medium-high frequency excitations. And then, the critical model between the pre-yield region and post-yield region is obtained. The critical boundary between different excitations is derived and comparatively analyzed. Finally, the experiments with the proposed MR damper are carried out. Compared with theoretical results, the damping force and dynamic stiffness increase with the increase of the applied current and excitations. Besides these, the energy dissipated performance can be improved by the pre-compression. When the initial pressure increases to 5 MPa with the fixed frequency of 10 Hz, the energy dissipation is increased by 43.5%. So the pre-compression is an effective way to solve the high frequency hardening. Besides these, the derived critical model can predict the performance of MR damper at different excitations.

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Section: Introductionmentioning

confidence: 99%

Characteristic analysis under small-stroke and medium-high frequency of magneto-rheological damper with pressure controlled mechanism

Dong¹,

Li²,

Yan³

et al. 2022

Smart Mater. Struct.

View full text Add to dashboard Cite

show abstract

“…Abouobaia et al 1,14 combined a MR damper and a centrifugal pendulum vibration absorber to design a new type of composite torsional vibration damper, and compared the torsional vibration control effects of the passive control and the skyhook control algorithm through simulation. Dong et al 15 introduced the concept of using squeeze strengthen effect to improve the output torque of the rotary MR damper. Senekal and Gurocak 16 investigated the compact MRbrake with serpentine flux path for haptics application.…”

Section: Introductionmentioning

confidence: 99%

Semi-active vibration control of a transmission system using a magneto-rheological variable stiffness and damping torsional vibration absorber

Dong

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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In this research effort, an innovative magneto-rheological variable stiffness and damping torsional vibration absorber (MR-VSDTVB) is proposed, and independent variable damping control and independent variable stiffness control are adopted to suppress the torsional vibration of the transmission system. MR-VSDTVB, based on semi-active control principle, exhibits a compact structure and integrates with magneto-rheological technology. First, the concept of MR-VSDTVB is discussed, and the output torque characteristic of MR-VSDTVB is analytically developed. Then, a prototype is fabricated and tested. A transmission system with MR-VSDTVB is proposed to verify the MR-VSDTVB's effectiveness. The structure and inherent characteristics of the transmission system are analyzed theoretically. Finally, an experimental setup of transmission system with MR-VSDTVB is built. Experimental results indicate that when torsional stiffness of MR-VSDTVB changes, a frequency shift phenomenon occurs; moreover, when torsional damping of MR-VSDTVB changes, the response amplitude of the experimental setup changes regularly; And finally, the on-off control test validates the effectiveness of semi-active control on the torsional vibration suppression of the transmission system. The above results verify the effectiveness of MR-VSDTVB in suppressing the torsional vibration of the transmission system. These findings are expected to expand the application of magneto-rheological technology and variable stiffness and variable damping technology in torsional vibration of transmission systems.

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Magneto-rheological variable damping and variable stiffness torsional vibration control of powertrain transmission

Li,

Ge,

Liang

et al. 2023

J Mech Sci Technol

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Axial squeeze strengthen effect on rotary magneto-rheological damper

Cited by 3 publications

References 29 publications

Characteristic analysis under small-stroke and medium-high frequency of magneto-rheological damper with pressure controlled mechanism

Characteristic analysis under small-stroke and medium-high frequency of magneto-rheological damper with pressure controlled mechanism

Semi-active vibration control of a transmission system using a magneto-rheological variable stiffness and damping torsional vibration absorber

Magneto-rheological variable damping and variable stiffness torsional vibration control of powertrain transmission

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