Magnetorheological Materials and Application Systems

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "E:Engineering and Technology".

Deadline for manuscript submissions: 30 April 2024 | Viewed by 628

Special Issue Editors

College of Opto-Electronic Engineering , Chongqing University, Chongqing, China, 400044
Interests: magnetorheological materials, devices, and systems; noise and vibration active control; the ultra-precision machining and testing

Special Issue Information

Dear Colleagues,

Despite numerous works on magnetorheological materials (fluids, elastomers, greases, gels, and foams) since the 1990s, few application systems have been commercialized, for example, automotive shock absorbers. One of the potential solutions to develop successful market products utilizing MR materials is resolving the temperature problem that affects the field-dependent properties of such materials and application systems. Recently, studies on this topic have actively sought to mitigate adverse temperature-related effects by proposing recipes such as the addition of nanosized particles and proper additives. However, most of the methods proposed so far have a limitation or trade-off as a result. For example, the thermal conductivity of MR materials can be reduced, but the field-dependent yield stress is decreased.

Based on the topic "Magnetorheological Materials and Application Systems", we aim to collect articles for a Special Issue in the journal Micromachines. We hope to accelerate the technology of MR materials in several research fields, including chemical engineering, chemistry, polymer sciences, chemical physics, mechanical engineering, electrical engineering, and medical engineering.

We look forward to receiving your contributions.

Prof. Dr. Seung-Bok Choi
Prof. Dr. Miao Yu
Guest Editors

Manuscript Submission Information

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Keywords

  • magnetorheological materials
  • temperature effect
  • thermal conductivity
  • heat transfer

Published Papers (1 paper)

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Research

19 pages, 16452 KiB  
Article
Experimental Study on the Skyhook Control of a Magnetorheological Torsional Vibration Damper
Micromachines 2024, 15(2), 236; https://doi.org/10.3390/mi15020236 - 02 Feb 2024
Viewed by 429
Abstract
This study proposes a dual-coil magnetorheological torsional vibration damper (MRTVD) and verifies the effectiveness of semi-active damping control to suppress the shaft system’s torsional vibration via experimental research. Firstly, the mechanical model of the designed MRTVD and its coupling mechanical model with the [...] Read more.
This study proposes a dual-coil magnetorheological torsional vibration damper (MRTVD) and verifies the effectiveness of semi-active damping control to suppress the shaft system’s torsional vibration via experimental research. Firstly, the mechanical model of the designed MRTVD and its coupling mechanical model with the rotating shaft system are established. Secondly, the torsional response of the shaft system is obtained via resonance experiments, and the influence of the current on the torsional characteristics of the magnetorheological torsional damper is analyzed. Finally, the MRTVD is controlled using the skyhook control approach. The experimental results demonstrate that when the main shaft passes through the critical speed range at various accelerations, the amplitude of the shaft’s torsional vibration decreases by more than 15%, and the amplitude of the shaft’s torsional angular acceleration decreases by more than 22%. These conclusions validate the inhibitory effect of MRTVD on the main shaft’s torsional vibrations under skyhook control. Full article
(This article belongs to the Special Issue Magnetorheological Materials and Application Systems)
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