Results 31 to 40 of about 22,792 (197)

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

open access: yesScientific 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   +3 more
doaj   +1 more source

A robust loop-shaping approach to fast and accurate nanopositioning [PDF]

open access: yes, 2013
Peer ...
Aphale, Sumeet S.   +2 more
core   +3 more sources

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

open access: yesJournal 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   +3 more
doaj   +1 more source

Wireless actuation of bulk acoustic modes in micromechanical resonators [PDF]

open access: yes, 2016
We report wireless actuation of a Lamb wave micromechanical resonator from a distance of over 1 m with an efficiency of over 15%. Wireless actuation of conventional micromechanical resonators can have broad impact in a number of applications from ...
Brown, Benjamin   +3 more
core   +1 more source

Vibration Characteristics of Stacked Piezoelectric Transducers

open access: yesTransactions of the Korean Society for Noise and Vibration Engineering, 2015
ABSTRACT This paper deals with the vibration characteristics of stacked transducers composed of piezoelectric discs, which are main elements of ultrasonic sensors or actuators. The stacked transducers were de-vised in the sense of natural frequencies. Two- or three-layer transducers were fabricated with piezo-electric discs of different diameters.
Dae Jong Kim, Jin Oh Kim
openaire   +2 more sources

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

open access: yesNihon 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

Performance of transducers with segmented piezoelectric stacks using materials with high electromechanical coupling coefficient

open access: yes, 2013
Underwater acoustic transducers often include a stack of thickness polarized piezoelectric material pieces of alternating polarity interspersed with electrodes, bonded together and electrically connected in parallel.
Markley, Douglas C.   +2 more
core   +1 more source

Nonlinear electromechanical behaviors of piezoelectric generators with hybrid stiffnesses

open access: yesEnergy 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   +7 more
doaj   +1 more source

Third-Harmonic and intermodulation distortion in bulk acoustic-wave resonators [PDF]

open access: yes, 2019
This article discusses on the measured third-order intermodulation (IMD3) products and third harmonics (H3) appearing in a set of six different solidly mounted resonators (SMR) and bulk acoustic-wave (BAW) resonators with different shapes and stack ...
Aigner, Robert   +3 more
core   +2 more sources

Measurement of Elastoresistivity at Finite Frequency by Amplitude Demodulation

open access: yes, 2018
Elastoresistivity, the relation between resistivity and strain, can elucidate subtle properties of the electronic structure of a material and is an increasingly important tool for the study of strongly correlated materials.
Fisher, Ian R.   +5 more
core   +1 more source

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