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Micromachines
Special Issues
Development and Application of Advanced Precision Vibration Isolation Systems
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Development and Application of Advanced Precision Vibration Isolation Systems

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

Deadline for manuscript submissions: closed (30 September 2024) | Viewed by 2980

Special Issue Editors

Dr. Min Wang

E-Mail Website
Guest Editor
School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200444, China
Interests: stewart platforms; vibration isolation; negative stiffness; active control; feedback control; feedforward control; sky-hook damping; piezoelectric actuator (PZT); voice coil motor (VCM); adaptive control algorithm; least mean square (LMS) algorithm; recursive least squares (RLS) algorithm; integral force feedback (IFF) algorithm
Dr. Jinglei Zhao

E-Mail Website
Guest Editor
The College of Mechanical and Vehicle Engineering, Chongqing University, Chongqing 400044, China
Interests: vibration isolation; negative stiffness; electromagnetic; Youla-parameterized control; metamaterial; sky-hook damping

Special Issue Information

Dear Colleagues,

Advanced precision vibration isolation systems are key technological solutions aimed at mitigating the vibration disturbances generated by machinery during operation, thereby minimizing their impact on the surrounding environment and other equipment. With advancements in technology and the continuous development of industrial sectors, the demand for high-precision machining, testing, and instruments has been increasing, highlighting the importance of developing and implementing advanced precision vibration isolation systems. These cutting-edge systems utilize advanced materials, design principles, and control algorithms to effectively minimize the transmission and diffusion of mechanical vibrations. They are widely applied in precision machining equipment, optical instruments, semiconductor manufacturing devices, etc., to enhance equipment stability and operation. However, to fully optimize the performance of precision vibration isolation systems, researchers and engineers must overcome significant challenges, such as the coexistence of low-frequency resonance and high-frequency isolation, and the dual-control dilemma between high damping and strong stability. Therefore, this Special Issue aims to showcase research papers focusing on the development of new approaches in precision vibration isolation, including new materials, novel structural designs, structural designs for biomimetic vibration reduction, and active vibration control algorithms.

We look forward to receiving your contributions.

Dr. Min Wang
Dr. Jinglei Zhao
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. Micromachines 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 2600 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

  • precision vibration isolation
  • active control
  • negative stiffness
  • multiple degrees of freedom
  • feedback control
  • feedforward control

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Published Papers (3 papers)

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Research

17 pages, 18738 KiB  
Article
Three-Axis Vibration Isolation of a Full-Scale Magnetorheological Seat Suspension
by Young T. Choi, Norman M. Wereley and Gregory J. Hiemenz
Micromachines 2024, 15(12), 1417; https://doi.org/10.3390/mi15121417 - 26 Nov 2024
Viewed by 337
Abstract
This study examines the three-axis vibration isolation capabilities of a full-scale magnetorheological (MR) seat suspension system utilizing experimental methods to assess performance under both single-axis and simultaneous three-axis input conditions. To achieve this, a semi-active MR seat damper was designed and manufactured to [...] Read more.
This study examines the three-axis vibration isolation capabilities of a full-scale magnetorheological (MR) seat suspension system utilizing experimental methods to assess performance under both single-axis and simultaneous three-axis input conditions. To achieve this, a semi-active MR seat damper was designed and manufactured to address excitations in all three axes. The damper effectiveness was tested experimentally for axial and lateral motions, focusing on dynamic stiffness and loss factor using an MTS machine. Prior to creating the full-scale MR seat suspension, a scaled-down version at one-third size was developed to verify the damper’s ability to effectively reduce vibrations in response to practical excitation levels. Additionally, a narrow-band frequency-shaped semi-active control (NFSSC) algorithm was developed to optimize vibration suppression. Ultimately, a full-scale MR seat suspension was assembled and tested with a 50th percentile male dummy, and comprehensive three-axis vibration isolation tests were conducted on a hydraulic multi-axis simulation table (MAST) for both individual inputs over a frequency range up to 200 Hz and for simultaneous multi-directional inputs. The experimental results demonstrated the effectiveness of the full-scale MR seat suspension in reducing seat vibrations. Full article
(This article belongs to the Special Issue Development and Application of Advanced Precision Vibration Isolation Systems)
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20 pages, 5075 KiB  
Article
Study of the Extremely Low-Frequency Noise Characteristics of a Micro-Thrust Measurement Platform
by Liexiao Dong, Shixu Lu, Luxiang Xu, Ning Guo, Mingshan Wu, Shengtao Liang and Jianfei Long
Micromachines 2024, 15(4), 508; https://doi.org/10.3390/mi15040508 - 8 Apr 2024
Viewed by 1092
Abstract
The critical structural parameters are optimized and studied using the numerical simulation method to improve the resolution and stability of the Micro-Thrust Measurement Platform (MTMP). Under two different ground random vibration environments, the parameters, such as pivot thickness, pendulum rod length, and pivot [...] Read more.
The critical structural parameters are optimized and studied using the numerical simulation method to improve the resolution and stability of the Micro-Thrust Measurement Platform (MTMP). Under two different ground random vibration environments, the parameters, such as pivot thickness, pendulum rod length, and pivot structure, are focused on analyzing the influence of the system’s resolution and stability. The results show that when the thickness of the pivot is 0.04 mm or 0.2 mm, and the pendulum rod length is 2 m, the effect of ground random vibration on the MTMP is minimized. At 0.1 mHz, it can reach 0.0057 μN/Hz. In the series double-pivot structure, an appropriate increase in the distance between the sheets can further optimize the above conclusions. The results and analysis within this study can provide support for the engineering design of the MTMP. Full article
(This article belongs to the Special Issue Development and Application of Advanced Precision Vibration Isolation Systems)
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17 pages, 9946 KiB  
Article
Sensor-Fusion-Based Simultaneous Positioning and Vibration Suppression Method for a Three-Degrees-of-Freedom Isolator
by Jing Wang, Lei Wang, Peng Jin, Zhen Zhang, Pengxuan Li and Ritao Xiao
Micromachines 2024, 15(3), 402; https://doi.org/10.3390/mi15030402 - 16 Mar 2024
Viewed by 1143
Abstract
For vibration isolation systems, vibration suppression and platform positioning are both important. Since absolute velocity feedback causes difficulty in achieving positioning while suppressing vibration, an H∞ control strategy based on sensor fusion feedback is proposed in this paper. The signals of inertial and [...] Read more.
For vibration isolation systems, vibration suppression and platform positioning are both important. Since absolute velocity feedback causes difficulty in achieving positioning while suppressing vibration, an H∞ control strategy based on sensor fusion feedback is proposed in this paper. The signals of inertial and displacement sensors are fused through a pair of complementary filters. Thus, active control based on the fusion signal could concurrently achieve vibration and position control since it is a displacement signal. In addition, the obtained fusion signals have a lower noise level. In this way, simultaneous positioning and vibration suppression can be established using the sensor fusion strategy. On this basis, in order to obtain an optimal H∞ controller, system damping can be maximized by using the performance weight function to attenuate noise; the system bandwidth is determined by the uncertainty weight function, which can avoid the effect of high-frequency modes of the system. The effectiveness of the proposed strategy is verified by comparing it with the conventional absolute velocity feedback strategy on a 3-DOF isolator. Full article
(This article belongs to the Special Issue Development and Application of Advanced Precision Vibration Isolation Systems)
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