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Actuators
Special Issues
Active, Semi-active and Passive Vibration Control
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Active, Semi-active and Passive Vibration Control

A special issue of Actuators (ISSN 2076-0825). This special issue belongs to the section "Actuators for Land Transport".

Deadline for manuscript submissions: closed (30 April 2023) | Viewed by 8583

Special Issue Editors

Prof. Dr. Norman M. Wereley

E-Mail Website
Guest Editor
Department of Aerospace Engineering, University of Maryland, 3179J Martin Hall, College Park, MD 20742, USA
Interests: smart materials and structures; actuators; sensors; dampers; energy absorbers; pneumatic artificial muscles; control systems; applications to aircraft, ground vehicles, and robotic systems
Special Issues, Collections and Topics in MDPI journals
Dr. Young-Tai Choi

E-Mail Website
Guest Editor
Department of Aerospace Engineering, University of Maryland, 3179J Martin Hall, College Park, MD 20742, USA
Interests: vibration and shock mitigation; smart materials

Special Issue Information

Dear Colleagues,

For several decades, vibration control has been a noteworthy research topic. Our daily lives can be noticeably disturbed by unwanted vibrations from the ground, marine, and aerial vehicles in which we ride or the machines and systems that we use. Vibration control can be generally divided into three categories: passive, semi-active, and active vibration control. These three distinct approaches exhibit different advantages and limitations from the perspective of achieving various design goals as well as impacting cost-effectiveness. Recent advances in the analysis, design, and control of vibration and shock mitigation systems, emerging multifunctional materials, and 3D printing techniques, can lead to improved vibration control performance. This Special Issue aims to highlight new advances, as well as pioneering designs and applications in all research areas associated with vibration control arising from steady state (e.g., harmonic excitation) or transient excitations (e.g., gusts or impacts). This Special Issue will be devoted to original research papers in topics related to vibration control. Submissions are encouraged but are not limited to the following topical areas:

  • Passive, semi-active, and active vibration isolation algorithms and applications;
  • Tuned mass dampers or dynamic vibration absorbers;
  • Shock and impact mitigation control;
  • Novel structure/mechanism designs for vibration control;
  • Engine mounting systems, and seat and vehicle suspension systems;
  • Negative-stiffness vibration isolators;
  • Bio-inspired vibration control;
  • Multifunctional materials for vibration control;
  • 3D-printed design for vibration control;
  • Vibration-based energy harvesting devices.

We look forward to receiving your valuable contributions.

Prof. Dr. Norman Wereley
Dr. Youngtai Choi
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Actuators is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • vibration control
  • passive
  • semi-active
  • active
  • shock
  • suspension
  • damper
  • absorber
  • negative-stiffness
  • 3D printing
  • multifunctional materials

Published Papers (4 papers)

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Research

21 pages, 7019 KiB  
Article
Linear and Nonlinear Models for Drop Simulation of an Aircraft Landing Gear System with MR Dampers
by Byung-Hyuk Kang, Bang-Hyun Jo, Bo-Gyu Kim, Jai-Hyuk Hwang and Seung-Bok Choi
Actuators 2023, 12(7), 287; https://doi.org/10.3390/act12070287 - 13 Jul 2023
Cited by 2 | Viewed by 1601
Abstract
In this study, our focus is on the drop test simulation of an MR (Magnetorheological) damper-based main landing gear (MRMLG), aiming to explore multi-degree-of-freedom (DOF) dynamic models during aircraft landing. Three different 6-DOF dynamic models are proposed in this work, and their drop [...] Read more.
In this study, our focus is on the drop test simulation of an MR (Magnetorheological) damper-based main landing gear (MRMLG), aiming to explore multi-degree-of-freedom (DOF) dynamic models during aircraft landing. Three different 6-DOF dynamic models are proposed in this work, and their drop performances are compared with results achieved by commercial software. The proposed models include a nonlinear aircraft model (NLAM); a linearized approximated aircraft model (LAAM) linearizing from the nonlinear equations of motion in NLAM; and a fully approximated aircraft model (FAAM) which linearizes the MRMLG’s strut force model. In order to evaluate the drop performance of the aircraft landing gear system with MR dampers, a 7-DOF aircraft model incorporating the nonlinear MRMLG was formulated using RecurDyn. The principal comparative parameters are the coefficient of determination (R2) for the system response of each model with the RecurDyn model and root mean square error (RMSE), which is the ensemble of CG displacement data for each model. In addition, the ensemble of time series data is created for diverse drop scenarios, providing valuable insights into the performance of the proposed drop test models of an aircraft landing gear system featuring MR dampers. Full article
(This article belongs to the Special Issue Active, Semi-active and Passive Vibration Control)
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19 pages, 5110 KiB  
Article
Multi-Physics Simulation and Experimental Verification of Magnetorheological Damper with Additional Stiffness
by Huijun Liang, Jie Li, Yongsheng Wang, Mingkun Liu, Jie Fu, Lei Luo and Miao Yu
Actuators 2023, 12(6), 251; https://doi.org/10.3390/act12060251 - 16 Jun 2023
Cited by 3 | Viewed by 1358
Abstract
Single-rod magneto-rheological dampers (MRD) have the advantages of a simple mechanism, high reliability, and broad application range. They are widely used in various semi-active vibration control fields. However, their working mode requires a compensating mechanism to perform volume compensation on the rod, leading [...] Read more.
Single-rod magneto-rheological dampers (MRD) have the advantages of a simple mechanism, high reliability, and broad application range. They are widely used in various semi-active vibration control fields. However, their working mode requires a compensating mechanism to perform volume compensation on the rod, leading to additional stiffness for the system. Ignoring this point makes it tough to establish an accurate mechanical model to describe its performance in the design stage, affecting its application. To address this issue, this study proposes a multi-physics simulation model based on gas compensation for single-rod MRD to characterize their mechanical performance accurately. Firstly, the mechanism and mechanical model of the single-rod gas compensation MRD are introduced. Secondly, considering that its performance is affected by the coupling effect of multiple physical fields, including magnetic, flow, and solid mechanics fields, the control equations and boundary conditions of each field are analyzed separately, and a multi-physics coupling simulation model is established by COMSOL. In particular, the gas compensation unit is considered in the multi-physics simulation model. The effect of the compensating mechanism on the mechanical performance of the damper under different excitation speeds, currents, and initial pressures is analyzed. Finally, the accuracy of the proposed method is verified through the demonstration power test. The results show that the simulation can describe the additional stiffness in the damper. The average error between experimental value and simulation value is 7%. This demonstrates the degree of agreement between the experiment and simulation. Full article
(This article belongs to the Special Issue Active, Semi-active and Passive Vibration Control)
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18 pages, 5482 KiB  
Article
Vibration Isolation Performance of an Adaptive Magnetorheological Elastomer-Based Dynamic Vibration Absorber
by Young Choi and Norman M. Wereley
Actuators 2022, 11(6), 157; https://doi.org/10.3390/act11060157 - 12 Jun 2022
Cited by 6 | Viewed by 2838
Abstract
This study evaluates the vibration isolation performance of an adaptive magnetorheological elastomer (MRE)-based dynamic vibration absorber (MRE-DVA) for mitigating the high frequency vibrations (100–250 Hz) of target devices. A simple and effective MRE-DVA design was presented and its vibration isolation performance was experimentally [...] Read more.
This study evaluates the vibration isolation performance of an adaptive magnetorheological elastomer (MRE)-based dynamic vibration absorber (MRE-DVA) for mitigating the high frequency vibrations (100–250 Hz) of target devices. A simple and effective MRE-DVA design was presented and its vibration isolation performance was experimentally measured. A cylindrical shaped MRE pad was configured to be operated in shear mode and also worked as a semi-actively tunable spring for achieving adaptive DVA. A complex stiffness analysis for the damper force cycle was conducted and it was experimentally observed that the controllable dynamic stiffness range of the MRE-DVA was greater than two over the tested frequency range. The transmissibility of a target system was measured and used as a performance index to evaluate its vibration isolation performance. It was also experimentally demonstrated that a better vibration isolation performance of the target device exposed to the high frequency vibrations could be achieved by using the adaptive MRE-DVA. Full article
(This article belongs to the Special Issue Active, Semi-active and Passive Vibration Control)
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18 pages, 2522 KiB  
Article
Control-Force Spectrum Considering Both Natural Period and Damping Ratio for Active Base-Isolated Building
by Yinli Chen, Daiki Sato, Kou Miyamoto and Jinhua She
Actuators 2022, 11(6), 156; https://doi.org/10.3390/act11060156 - 11 Jun 2022
Cited by 2 | Viewed by 1657
Abstract
The active structural control (ASC) has been applied to base-isolated buildings to achieve a high-damping system. The critical step for designing an ASC system is selecting control parameters and isolation parameters that satisfy the design restrictions. However, the conventional methods are limited in [...] Read more.
The active structural control (ASC) has been applied to base-isolated buildings to achieve a high-damping system. The critical step for designing an ASC system is selecting control parameters and isolation parameters that satisfy the design restrictions. However, the conventional methods are limited in theoretically estimating the maximum control force, which requires great demand for trial-and-error approaches and numerical simulations. This paper constructed the equivalent model of the feedback control system that theoretically expresses the dependence of vibration characteristics (natural period and damping ratio) of the control system on the feedback gain. Then, the control-force spectrum is proposed that estimates the maximum control force for a feedback control system, adjusting both the natural period and damping ratio of the control system. The maximum responses and control force are estimated without additional numerical simulations and trial-and-error approaches using the equivalent model and control-force spectrum. Moreover, a design method was devised for determining the allowance range of the vibration characteristics of structures (damping ratio and natural period) and controllers that satisfy the design limitations (maximum responses and maximum control force). The design method does not require trial-and-error and numerical simulations, thus simplifying the design procedure. Finally, this paper uses numerical examples and a design example to verify the validity of the control-force spectrum and design method. Full article
(This article belongs to the Special Issue Active, Semi-active and Passive Vibration Control)
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