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Micromachines
Special Issues
Recent Advances in N/MEMS Nonlinear Dynamics
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Recent Advances in N/MEMS Nonlinear Dynamics

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

Deadline for manuscript submissions: closed (31 December 2023) | Viewed by 3055

Special Issue Editors

Prof. Dr. Rong-hua Huan

E-Mail Website
Guest Editor
Department of Mechanics, Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Zhejiang University, Hangzhou 310027, China
Interests: nonlinear dynamics; random dynamics; MEMS dynamics; MEMS sensors; MEMS resonator; vibration control
Dr. Xuefeng Wang

E-Mail Website
Guest Editor
School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Xi'an 710129, China
Interests: M/NMES nonlinear dynamics/sensing; structure vibration control

Special Issue Information

Dear Colleagues,

Since the rise of Integrated Circuit (IC) technology in 1990, nano/microelectromechanical systems (N/MEMS) have increasingly attracted considerable interest due to their small size and low power consumption. Due to the effects of micro size and multi-energy coupling, N/MEMS systems can be easily driven into nonlinear regimes, which leads to rich nonlinear phenomena such as internal resonance, super/sub-harmonic synchronization, frequency locking, dynamic pull-in, frequency comb response, etc. Recent research has found that some of the nonlinear effects can be utilized to improve the dynamic performance of N/MEMS systems, which provides novel ideas for the design of high-performance sensing, actuating, or memory devices. Thus, this Special Issue seeks to showcase research papers, communications, and review articles that focus on recent advances in the field of the nonlinear dynamics of N/MEMS systems.

Prof. Dr. Rong-hua Huan
Dr. Xuefeng Wang
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

  • nonlinear
  • dynamics
  • MEMS
  • NEMS
  • resonator
  • sensors
  • synchronization
  • internal resonance
  • frequency comb
  • random
  • applications
  • multi-energy coupling
  • mode coupling

Published Papers (3 papers)

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Research

12 pages, 2442 KiB  
Article
Nonlinearity-Induced Asymmetric Synchronization Region in Micromechanical Oscillators
by Zhonghua Liu, Bingchan Qin, Zhan Shi, Xuefeng Wang, Qiangfeng Lv, Xueyong Wei and Ronghua Huan
Micromachines 2024, 15(2), 238; https://doi.org/10.3390/mi15020238 - 4 Feb 2024
Viewed by 813
Abstract
Synchronization in microstructures is a widely explored domain due to its diverse dynamic traits and promising practical applications. Within synchronization analysis, the synchronization bandwidth serves as a pivotal metric. While current research predominantly focuses on symmetric evaluations of synchronization bandwidth, the investigation into [...] Read more.
Synchronization in microstructures is a widely explored domain due to its diverse dynamic traits and promising practical applications. Within synchronization analysis, the synchronization bandwidth serves as a pivotal metric. While current research predominantly focuses on symmetric evaluations of synchronization bandwidth, the investigation into potential asymmetries within nonlinear oscillators remains unexplored, carrying implications for sensor application performance. This paper conducts a comprehensive exploration employing straight and arch beams capable of demonstrating linear, hardening, and softening characteristics to thoroughly scrutinize potential asymmetry within the synchronization region. Through the introduction of weak harmonic forces to induce synchronization within the oscillator, we observe distinct asymmetry within its synchronization range. Additionally, we present a robust theoretical model capable of fully capturing the linear, hardening, and softening traits of resonators synchronized to external perturbation. Further investigation into the effects of feedback strength and phase delay on synchronization region asymmetry, conducted through analytical and experimental approaches, reveals a consistent alignment between theoretical predictions and experimental outcomes. These findings hold promise in providing crucial technical insights to enhance resonator performance and broaden the application landscape of MEMS (Micro-Electro-Mechanical Systems) technology. Full article
(This article belongs to the Special Issue Recent Advances in N/MEMS Nonlinear Dynamics)
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16 pages, 5850 KiB  
Article
Multi-Objective Optimization of a Long-Stroke Moving-Iron Proportional Solenoid Actuator
by Peng Liu, Yuwen Ouyang and Wenwen Quan
Micromachines 2024, 15(1), 58; https://doi.org/10.3390/mi15010058 - 27 Dec 2023
Cited by 1 | Viewed by 879
Abstract
In this study, the performance of a long-stroke moving-iron proportional solenoid actuator (MPSA) was improved by combining numerical simulations and experiments. A finite element model of the MPSA was developed; its maximum and mean relative absolute errors of electromagnetic force were 4.3% and [...] Read more.
In this study, the performance of a long-stroke moving-iron proportional solenoid actuator (MPSA) was improved by combining numerical simulations and experiments. A finite element model of the MPSA was developed; its maximum and mean relative absolute errors of electromagnetic force were 4.3% and 2.3%, respectively, under typical work conditions. Seven design parameters including the cone angle, cone length, depth of the inner hole of the coil skeleton, cone width of the armature, inner cone diameter, and initial position of the moving-iron core were selected for developing the model, and the coefficient of the variation in electromagnetic force, nominal acceleration, 95% of the maximum stable output electromagnetic force, and corresponding response time were used as the performance indicators. The constraint relation between each performance indicator and the influence of each design parameter on the performance indicators were revealed using the uniform Latin hypercube experiment design, correlation analysis, and the main effect analysis method. A multi-objective optimization mathematical model of the MPSA was developed by combining traditional surrogate and machine learning models. The Pareto solution set was obtained using the nondominated sorting genetic algorithm II (NSGA-II), and three decision schemes with different attitudes were determined using the Hurwicz multi-criteria decision-making method. The results showed that a strong contradiction exists among the 95% of the maximum stable output electromagnetic force and its corresponding response time and the coefficient of the variation in electromagnetic force. The cone angle considerably influenced the performance indicators. Compared with the initial design, the coefficient of the variation in electromagnetic force was reduced by 54.08% for the positive decision, the corresponding response time was shortened by 15.65% for the critical decision, and the corresponding acceleration was enhanced by 10.32% for the passive decision. Thus, the overall performance of the long-stroke MPSA effectively improved. Full article
(This article belongs to the Special Issue Recent Advances in N/MEMS Nonlinear Dynamics)
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16 pages, 9876 KiB  
Article
Simulation Methods for MEMS S&A Devices for 2D Fuze Overload Loading
by Zhibo Wu, Yanbing Zhang, Chuanmeng Sun, Lei Feng, Shuangfeng Liu and Bin Jiao
Micromachines 2023, 14(8), 1566; https://doi.org/10.3390/mi14081566 - 7 Aug 2023
Cited by 1 | Viewed by 888
Abstract
An experimental testing system for the two-dimensional (2D) fuze overload loading process was designed to address the loading issues of recoil overload and centrifugal overload in fuze safety and arming (S&A) device. By incorporating centrifuge rotation energy storage, impact acceleration simulation, and equivalent [...] Read more.
An experimental testing system for the two-dimensional (2D) fuze overload loading process was designed to address the loading issues of recoil overload and centrifugal overload in fuze safety and arming (S&A) device. By incorporating centrifuge rotation energy storage, impact acceleration simulation, and equivalent centrifugal rotation simulation, a block equipped with a fuze S&A device accelerated instantly upon having impact from a centrifuge-driven impact hammer, simulating recoil overload loading. The impact hammer was retracted instantaneously by adopting an electromagnetic brake, which resulted in the centrifugal rotation of the block around its track, to simulate the centrifugal overload loading. The dynamic equations of the experimental testing system and the equations of impact hammer motions were established, whereby the rotation speed of the centrifuge and the braking force of the electromagnetic brake were calculated and selected. A dynamic model of the collision between the impact hammer and block was established using ANSYS/LS-DYNA software for simulation analysis. The acceleration curves of the recoil overload and centrifugal overload with variations in the centrifuge speed, cushion material, and buffer thickness were obtained, which verified the feasibility of the proposed loading simulation method. Two-dimensional overload loading simulation tests were performed using the developed experimental testing system, and the acceleration curves of the recoil overload and centrifugal overload were measured. The test results indicated that the proposed system can accomplish 2D overload loading simulations for a recoil overload of several 10,000× g and centrifugal overload of several 1000× g. Full article
(This article belongs to the Special Issue Recent Advances in N/MEMS Nonlinear Dynamics)
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