Results 21 to 30 of about 4,071 (209)

Electromechanical Modelling of a Piezoelectric Stack Energy Harvester

Proceedings, 2018
In this paper, the behavior of a piezoelectric stack generator subject to a direct mechanical force, such as that experienced by pedestrian loads, is characterized and modelled.
Matthew Evans, Lihua Tang, Chris Bowen, Aiguo P. Hu, Kai Tao, Kean Aw   +5 more
doaj   +1 more source

A novel spherical ultrasonic motor with wire stators and measuring torque and preload via a new method

Scientific Reports, 2023
The present study introduces a multi-degree-of-freedom (MDOF) ultrasonic motor, which is capable of driving a spherical rotor using spiral wire stators and a piezoelectric stack actuator. Wire stators and piezoelectric stack actuators enable the proposed
Seyed Hassan Jahantab, Yousef Hojjat, Behzad Ghavami Namin, Mohammad Shirkosh   +3 more
doaj   +1 more source

Low-frequency broadband multidirectional vibration isolation by piezoelectric smart platform with active control

Journal of Low Frequency Noise, Vibration and Active Control, 2023
A high-precision equipment is very sensitive to vibration, even micro vibration. How to isolate the low-frequency broadband multidirectional vibration remains a challenge.
Wentao Zou, Ningdong Hu, Xue Yang, Hongping Hu   +3 more
doaj   +1 more source

Path-length control for a reflector antenna using piezoelectric actuators and a focus adjustment mechanism

Nihon Kikai Gakkai ronbunshu, 2016
A novel method for recovering antenna gains of a reflector antenna system using piezoelectric stack actuators and a focus adjustment mechanism is developed and its feasibility is investigated.
Hiroaki TANAKA
doaj   +1 more source

Nonlinear electromechanical behaviors of piezoelectric generators with hybrid stiffnesses

Energy Conversion and Management: X
In this paper, we introduce a novel two-degree-of-freedom piezoelectric stack hybrid energy harvester including a piezoelectric stack and a set of piezoelectric layers.
Zhongjie Li, Xuejiao Yan, Yan Peng, Jiepeng Liu, Fan Shen, Xie Xie, Jianyong Zheng, Chaoqun Duan   +7 more
doaj   +1 more source

Extrusion‐Based Additive Manufacturing of Advanced Ceramics: Strengthening Mechanisms and Process Optimization Review

Advanced Engineering Materials, EarlyView.
This review comprehensively evaluates extrusion‐based additive manufacturing for advanced ceramics, detailing feedstock options and key process parameters. By critically addressing defect mechanisms like porosity and cracking, the work highlights optimization strategies through machine learning and advanced postprocessing.
Meisam Bakhtiari, Mohammad Hadi Sheikh‐Ansari, Avinash Borgaonkar, Mehran Dadkhah, Abdollah Saboori   +4 more
wiley   +1 more source

50 GHz Piezoelectric Acoustic Filter

IEEE Journal of Microwaves
This paper presents significant frequency scaling of acoustic filter technology to 50 GHz. This achievement is enabled by the periodically poled piezoelectric film LiNbO3 multilayer stack, in which piezoelectric thin-films of alternating orientations are
Omar Barrera, Jack Kramer, Lezli Matto, Vakhtang Chulukhadze, Sinwoo Cho, Michael Evan Liao, Mark S. Goorsky, Ruochen Lu   +7 more
doaj   +1 more source

Development of a Three‐Axis Planar Hall Magnetoresistance Sensor Using a Superparamagnetic Nanoparticle‐Based Flux Guide

Advanced Functional Materials, EarlyView.
A printed superparamagnetic nanoparticle‐based flux guide enables the realization of a hysteresis‐free three‐axis magnetic sensor. This innovative architecture efficiently redirects out‐of‐plane fields to planar sensing elements, facilitating simultaneous vector detection without complex reset protocols.
Changyeop Jeon, Mijin Kim, Keonmok Kim, Byeonghwa Lim, Bibhutibhusan Nayak, Youngdo Jung, Bo‐Yeon Lee, Taehyeong Jeon, Jinwoo Kim, Sunjong Oh, CheolGi Kim   +10 more
wiley   +1 more source

Active friction-regulated inertia impact piezoelectric actuator

Heliyon
In inertia impact piezoelectric actuators, the phenomenon of high-frequency drive-induced back-stepping poses a significant limitation to their overall performance.
Zhipeng Jin, Xin Song, BaoShan Guo
doaj   +1 more source

Nanoscale Spatial Tuning of Superconductivity in Cuprate Thin Films via Direct Laser Writing

Advanced Functional Materials, EarlyView.
Maskless direct laser writing enables local control of oxygen stoichiometry in epitaxial YBCO thin films under ambient conditions. Sub‐micrometer grayscale patterns with tunable optical response and superconducting transport properties are achieved.
Irene Biancardi, Valerio Levati, Jordi Alcalà, Thomas Günkel, Nicolas Lejeune, Riccardo Girelli, Alejandro V. Silhanek, Valeria Russo, Narcís Mestres, Daniela Petti, Anna Palau, Edoardo Albisetti   +11 more
wiley   +1 more source