scholarly journals A strong electromechanically coupled and low-damped harvester for resonant frequency tuning

2021 ◽  
Author(s):  
David Gibus ◽  
Pierre Gasnier ◽  
Adrien Morel ◽  
Adrien Ameye ◽  
Adrien Badel
Keyword(s):  
Resonant Frequency ◽  
Frequency Tuning

A Frequency-Tunable Comb Resonator Using Spring Tension and Compression Effects

2004 ◽  
Author(s):  
Ki Bang Lee ◽  
Albert P. Pisano ◽  
Liwei Lin
Keyword(s):  
Resonant Frequency ◽  
Bias Voltage ◽  
Frequency Tuning ◽  
Electrostatic Force ◽  
Voltage Change ◽  
Tension And Compression ◽  
Frequency Tunable ◽  
Frequency Changes ◽  
Compression Effects ◽  
First Time

A 2μm-thick frequency-tunable microresoantor capable of either increasing or decreasing its resonant frequency by a combination of Joule heating and electrostatic force has been successfully demonstrated for the first time. For the heating voltage increase from 0 to 2V under fixed bias voltage of 40V, the resonant frequency changes from 22.2kHz to 16.2kHz, resulting in the 27% reduction in the resonant frequency. For the bias voltage change from 20V to 40V under the heating voltage of 0V, the resonant frequency increase from 19.0kHz to 23.6kHz, resulting in the 24.2% increase in the resonant frequency. As such, this surface-micromachined microactuator could assist complicated frequency tuning for applications of microsensors and microactuators.

scholarly journals Evaluation and calculations of modes resonant cantilever for laser optical fiber assembly

2020 ◽  
Vol 17 (2) ◽  
pp. 975
Author(s):  
Mohanad H. Ali
Keyword(s):  
Optical Fiber ◽  
Resonant Frequency ◽  
Frequency Tuning ◽  
Optical Fiber Communication ◽  
Laser Source ◽  
Fiber Communication ◽  
Fiber Assembly ◽  
Promising Tool ◽  
Highly Uniform ◽  
Optical Laser

<p>Biosensors depend on cantilevers have developed a promising tool for detecting biomedical, optical laser communication and many fields of interactions with high accuracy. We modeled the operation of cantilevers<strong> </strong>with two magnetic and coil using Ansys program. This simulation technique can capably be used to select the appropriate design and dimensions of cantilever with the geometry of system. The primary main of the magnetic design is to improve the geometry of the coil and shape to yield a highly uniform for 3D of optical fiber includes Silica Glass and  Nickel cantilever, two magnets and one coil that apply to force on the cantilever cylinder is using as a cantilever in the designing of this case.In conclusion,resonant frequency(  tuning applying cantilivier presented in the resracher have larger variable range by using 2-magnets with the coil.However,the adjusting of the system and changing the deminsions.Resolutions to this problematic contain tuning the modes of resonant frequency to produce by cantilivier with  2-magnets and coil when the signal  pass from  laser source. Based on these simulations and characterization results, the proposed assembly can be a good applicant for evolving a low price, high material platform for many biological, laser optical fiber, communication, machine learning, biosensors and biomedical applications.</p>

Resonant Frequency Tuning of Piezoelectric Ultrasonic Microsensors by Bias Voltage Application to Extra Top-Electrodes on PZT Diaphragms

2010 ◽  
Vol 408 (1) ◽  
pp. 48-54 ◽  
Author(s):  
Kaoru Yamashita ◽  
Kenji Tomiyama ◽  
Keita Yoshikawa ◽  
Minoru Noda ◽  
Masanori Okuyama
Keyword(s):  
Resonant Frequency ◽  
Bias Voltage ◽  
Frequency Tuning ◽  
Voltage Application

Resonant Frequency Tuning Strategies for Vibration-Based Energy Harvesters

2017 ◽  
Author(s):  
Lin Dong ◽  
Frank T. Fisher
Keyword(s):  
Energy Harvesting ◽  
Resonant Frequency ◽  
Energy Harvester ◽  
Frequency Tuning ◽  
Electrical Energy ◽  
Mechanical Stretch ◽  
Applied Bias Voltage ◽  
Energy Harvesters ◽  
Frequency Matching ◽  
Low Levels

Vibration-based energy harvesting has been widely investigated to as a means to generate low levels of electrical energy for applications such as wireless sensor networks. However, due to the fact that vibration from the environment is typically random and varies with different magnitudes and frequencies, it is a challenge to implement frequency matching in order to maximize the power output of the energy harvester with a wider frequency bandwidth for applications where there is a time-dependent, varying source frequency. Possible solutions of frequency matching include widening the bandwidth of the energy harvesters themselves in order to implement frequency matching and to perform resonance-based tuning approach, the latter of which shows the most promise to implement a frequency matching design. Here three tuning strategies are discussed. First a two-dimensional resonant frequency tuning technique for the cantilever-geometry energy harvesting device which extended previous 1D tuning approaches was developed. This 2D approach could be used in applications where space constraints impact the available design space of the energy harvester. In addition, two novel resonant frequency tuning approaches (tuning via mechanical stretch and tuning via applied bias voltage, respectively) for electroactive polymer (EAP) membrane-based geometry energy harvesters was proposed, such that the resulting changes in membrane tension were used to tune the device for applications targeting variable ambient frequency environments.

scholarly journals Design of a Superstrate Module for Simple Resonant Frequency Tuning

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 43742-43748
Author(s):  
Tae Heung Lim ◽  
Hosung Choo ◽  
Gangil Byun
Keyword(s):  
Resonant Frequency ◽  
Frequency Tuning

In-Situ Frequency Tuning of Electrostatically Actuated Vibrating Nano Structures Using Focused Ion Beam

2006 ◽  
Author(s):  
Jiyoung Chang ◽  
Jongbaeg Kim ◽  
Byung-Kwon Min ◽  
Sang Jo Lee ◽  
Liwei Lin
Keyword(s):  
Resonant Frequency ◽  
Focused Ion Beam ◽  
Frequency Tuning ◽  
Electrostatic Force ◽  
Ion Beam ◽  
Chemical Vapor ◽  
Fem Analysis ◽  
Experimental Result ◽  
Nano Structures

Schemes for in-situ resonant frequency tuning of nano scale vibrating structures using Focused Ion Beam (FIB) sputtering and FIB-Chemical Vapor Deposition (CVD) are presented. This approach introduces precisely controlled permanent increase or decrease of resonant frequencies on processed nano structures, enabling the frequency adjustment when the desired resonant frequency is higher or lower than the actual frequency of the fabricated resonators. The vibration is induced by electrostatic force between resonator and stator using 0~10V AC input and all the processes including fabrication of nanostructure, electrostatic actuation, vibration observation and frequency tuning in either higher or lower direction were successfully conducted in single FIB chamber. The range of the frequency tuned from 600kHz initial resonant frequency is +6kHz with -1.9μm and -65kHz with +1.1μm length change of the nano-resonator respectively. Structural FEM analysis result is compared with the experimental result.

An internal resonance based frequency up-converting energy harvester

2018 ◽  
Vol 29 (13) ◽  
pp. 2766-2781 ◽  
Author(s):  
Yipeng Wu ◽  
Hongli Ji ◽  
Jinhao Qiu ◽  
Weiqun Liu ◽  
Jinling Zhao
Keyword(s):  
Resonant Frequency ◽  
Internal Resonance ◽  
Degrees Of Freedom ◽  
Energy Harvester ◽  
Frequency Tuning ◽  
Low Frequency ◽  
Vibration Energy Harvester ◽  
First Order ◽  
High Frequency Response ◽  
Voltage Frequency

Frequency up-converting vibration energy harvester can bridge the gap between high-frequency response and low-frequency input, greatly increasing the efficiency of energy conversion. This article proposed a novel frequency up-converting energy harvester based on 1:3 internal resonance in 2 degree-of-freedom cubic nonlinear systems. The harvester consists of two asymmetric cantilevers corresponding to two vibration degrees-of-freedom. The ratio of cantilevers’ first-order resonances is (or close to) 1:3. When excited frequency matches the resonant frequency of the first assisting cantilever, 1:3 internal resonance of the harvester system occurs, leading to drastic vibration of the second generating cantilever at its resonance. The generated voltage frequency is then three times increased. Finally, simulated and experimental results clearly proved this frequency up-converting principle. In addition, the resonant frequency tuning and wideband behaviors of the harvester were also investigated, which increased the viability of the proposed harvester under the practical environment vibrations.

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