Results 1 to 10 of about 881,566 (302)

The Energy Compensation of the HRG Based on the Double-Frequency Parametric Excitation of the Discrete Electrode [PDF]

Sensors, 2020
In this study, for energy compensation in the whole-angle control of Hemispherical Resonator Gyro (HRG), the dynamical equation of the resonator, which is excited by parametric excitation of the discrete electrode, is established, the stability ...
Wanliang Zhao, Hao Yang, Fucheng Liu, Yan Su, Lijun Song   +4 more
doaj   +4 more sources

Utilization of Nonlinear Parametric Resonance in Micro Sensor Probes to Enhance Atomic Force Microscope Resolution [PDF]

Sensors
Atomic Force Microscopy (AFM) uses oscillating cantilever-shaped microprobes to measure nanometer-scaled sample topography. Spatial resolution of AM-AFM is determined by the dynamics of the cantilever-sample system including thermomechanical noise of the
Jonathan Ehrmann, Oliver Radler, Thomas Sattel   +2 more
doaj   +2 more sources

Parametric excitation and squeezing in a many-body spinor condensate [PDF]

Nature Communications, 2016
Ultracold atomic gases with collisional interactions allow the exploration of quantum many-body physics. Here, the authors vary over time the contributions to the interaction energy to coherently control the spin state of an atomic Bose gas, thereby ...
T. M. Hoang, M. Anquez, B. A. Robbins, X. Y. Yang, B. J. Land, C. D. Hamley, M. S. Chapman   +6 more
doaj   +2 more sources

Analysis of Parametric and Subharmonic Excitation in Push-Pull Driven Disk Resonator Gyroscopes

Micromachines, 2021
For micro-electromechanical system (MEMS) resonators, once the devices are fabricated and packaged, their intrinsic quality factors (Q) will be fixed and cannot be changed, which seriously limits the further improvement of the resonator’s performance. In
Kai Wu, Kuo Lu, Qingsong Li, Yongmeng Zhang, Ming Zhuo, Sheng Yu, Xuezhong Wu, Dingbang Xiao   +7 more
doaj   +1 more source

Nonlinear boudary value problem in the case of parametric resonance [PDF]

Компьютерные исследования и моделирование, 2015
We construct necessary and sufficient conditions for the existence of solution of seminonlinear matrix boundary value problem for a parametric excitation system of ordinary differential equations.
Sergey Mikhaylovich Chujko, O. V. Nesmelova (Starkova), D. V. Sysoev   +2 more
doaj   +1 more source

Nonlinear Coupled Vibration Behavior of BFRP Cables on Long-Span Cable-Stayed Bridges under Parametric Excitation

Buildings, 2023
Based on the cable-stayed beam model, this paper studies the nonlinear coupled vibration behavior of basalt fiber-reinforced polymer (BFRP) cables on long-span cable-stayed bridges under parametric excitation. Considering the sag, damping of BFRP cables,
Yaqiang Yang, Zixian Zhou, Yanlin Guan, Jianzhe Shi, Qiwei Zhan, Mohamed F. M. Fahmy, Bitao Wu   +6 more
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Bifurcation analysis of the thresholds of parametric generation of terahertz waves in nonlinear multilayer graphene nanostructures

Известия высших учебных заведений. Поволжский регион: Физико-математические науки, 2023
Background. The purpose of this work is to develop a method for mathematical modeling of nonlinear effects (parametric generation, parametric excitation of waves, and instabilities) arising from the interaction of electromagnetic waves with strongly ...
Galina S. Makeeva
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Equivalent Electronic Circuit of a System of Oscillators Connected with Periodically Variable Stiffness

Applied Sciences, 2022
In this paper, we have shown an electronic circuit equivalence of a mechanical system consisting of two oscillators coupled with each other. The mechanical design has the effects of the magnetic spring force resistance force, and the spring constant of ...
Soumyajit Seth, Grzegorz Kudra, Krzysztof Witkowski, Jan Awrejcewicz   +3 more
doaj   +1 more source

Stability analysis of deepwater compliant vertical access riser about parametric excitation

International Journal of Naval Architecture and Ocean Engineering, 2019
If heave motion in the platform causes horizontal parametric vibration of a Compliant Vertical Access Riser (CVAR), the riser may become unstable. A combination of riser parameters lies in the unstable region aggravates vibrational damage to the riser ...
Min Lou, Ping Hu, Xiaoliang Qi, Hongwei Li   +3 more
doaj   +1 more source

Enhancing Electrical Generation Efficiency through Parametrical Excitation and Slapping Force in Nonlinear Elastic Beams for Vibration Energy Harvesting

Sensors, 2023
This study aims to enhance conventional vibration energy harvesting systems (VEHs) by repositioning the piezoelectric patch (PZT) in the middle of a fixed–fixed elastic steel sheet instead of the root, as is commonly the case.
Yi-Ren Wang, Chun-Hsiao Kuo
doaj   +1 more source