Results 51 to 60 of about 22,792 (197)

Study on Electrical Parameter Matching of Piezoelectric Stack Periodic Strut for Helicopter Cabin Noise Control

Shock and Vibration, 2022
The gear meshing noise generated by the helicopter main reducer is one of the important sources of noise in the helicopter cabin. By improving the isolation performance of the struts supporting reducer to the gear meshing vibration, the purpose of ...
Yue Hui-yu, Lu Yang, Dang Chong, Qin Yi-Fan, Ma Jin-chao, Zhu Tian-Yu   +5 more
doaj   +1 more source

Fabrication of Surface Micromachined AlN Piezoelectric Microstructures and its Potential Apllication to RF Resonators [PDF]

, 2005
We report on a novel microfabrication method to fabricate aluminum nitride (AlN) piezoelectric microstructures down to 2 microns size by a surface micromachining process.
Berenschot, E., Elwenspoek, M., Krijnen, G., Saravanan, S.   +3 more
core   +1 more source

Measurement of the elastoresistivity coefficients of the underdoped iron-arsenide Ba(Fe$_{0.975}$Co$_{0.025}$)$_2$As$_2$

, 2013
A new method is presented for measuring terms in the elastoresistivity tensor $m_{ij}$ of single crystal samples with tetragonal symmetry. The technique is applied to a representative underdoped Fe-arsenide, Ba(Fe$_{0.975}$Co$_{0.025}$)$_2$As$_2 ...
Fisher, Ian R., Kuo, Hsueh-Hui, Riggs, Scott C., Shapiro, Maxwell C.   +3 more
core   +1 more source

A Frequency Up-Conversion Piezoelectric Energy Harvester Shunted to a Synchronous Electric Charge Extraction Circuit

Micromachines
A frequency up-conversion piezoelectric energy harvester (FUC-PEH) consists of a force amplifier, a piezoelectric stack, a low-frequency oscillator (LFO), and a stop limiter.
Xuzhang Peng, Hao Tang, Zhongjie Li, Junrui Liang, Liuding Yu, Guobiao Hu   +5 more
doaj   +1 more source

A Novel Drive Option for Piezoelectric Ultrasonic Transducers

Modelling and Simulation in Engineering, 2011
This paper concentrates on ultrasonic transducers, which are driven by piezoelectric ceramic rings that are arranged in a stack. A novel drive option, where the stack contains a new type of divided piezoelectric rings, is analyzed using the finite ...
Diana Engelke, Bernd Oehme, Jens Strackeljan   +2 more
doaj   +1 more source

Hot Pressed K0.5Na0.5NbO3 Material for Piezoelectric Transformer for Energy Harvesting [PDF]

Archives of Metallurgy and Materials, 2018
An optimized method of vibration Energy Harvesting is based on a step-down transformer that regulates the power flow from the piezoelectric element to the desired electronic load.
L. Kozielski, K. Feliksik, B. Wodecka-Duś, D. Szalbot, S. Tutu   +4 more
doaj   +1 more source

Active micro-vibration isolation system for adaptive vibration suppression tests using piezoelectric stack actuator

Journal of Low Frequency Noise, Vibration and Active Control
An active micro-vibration isolation system for adaptive vibration suppression using piezoelectric stack actuators is presented, along with the discrete time modelling method, real-time adaptive controller design, and hardware implementation.
Zhiyuan Gao, Lei Zhang, Tongxin Xu, Xiaojin Zhu   +3 more
doaj   +1 more source

Vibration Attenuation by a Combination of a Piezoelectric Stack and a Permanent Magnet

Shock and Vibration, 2012
The present work proposes a non-contact vibration attenuator made up of a permanent magnet mounted on a piezoelectric stack. Two such actuators are made to work simultaneously in a 'twin-actuator' configuration.
A. Nandi, S. Neogy, S. Bhaduri, H. Irretier   +3 more
doaj   +1 more source

Low insertion loss air-coupled ultrasonic transducer with parallel laminated piezoelectric structure

AIP Advances, 2020
This work presents a low insertion loss air-coupled ultrasonic transducer with a parallel laminated piezoelectric structure. The relevant parameters of this structure are theoretically analyzed.
Xiaoyu Wang, Xun Gong, Congcong Li, Ranran Wu, Zhenglin Chen, Haodong Wu, De Zhang, Xun Cao   +7 more
doaj   +1 more source

Piezoelectric Hysteresis Modeling of Hybrid Driven Three-Dimensional Elliptical Vibration Aided Cutting System Based on an Improved Flower Pollination Algorithm

Micromachines, 2021
Three-dimensional elliptical vibration assisted cutting technology has been widely used in the past few years. The piezoelectric stack drive structure is an important part of the three-dimensional elliptical vibration aided cutting system.
Xifeng Fu, Hong Gong, Mingming Lu, Jiakang Zhou, Jieqiong Lin, Yongsheng Du, Ruiqi Zhou   +6 more
doaj   +1 more source