Results 31 to 40 of about 22,436 (254)

Sensor-less parameter estimation of electromagnetic actuator for shunt damping

open access: yesNihon Kikai Gakkai ronbunshu, 2015
Electromagnetic shunt damping is a sensor-less passive damping technique using an electromagnetic actuator. The accurate values of the parameters of the system are essentially required for designing a controller in the damping technique.
Toru IKEGAME   +3 more
doaj   +1 more source

Parametric Study of Bolt Clamping Effect on Resonance Characteristics of Langevin Transducers with Lumped Circuit Models

open access: yesSensors, 2020
We recently proposed a numerical model using equivalent circuit models to analyze the resonance characteristics of Langevin transducers and design them in a systematic manner. However, no pre-load torque biased by a metal bolt was considered in the model.
Jinhyuk Kim, Jungwoo Lee
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

Experimental study of energy transport between two granular gas thermostats [PDF]

open access: yes, 2014
We report on the energy transport between two coupled probes in contact with granular thermostats at different temperatures. In our experiment, two identical blades, which are electromechanically coupled, are immersed in two granular gases maintained in ...
Lecomte, Charles-Édouard   +1 more
core   +7 more sources

Low-Cost Piezoelectric Sensors for Time Domain Load Monitoring of Metallic Structures During Operational and Maintenance Processes [PDF]

open access: yes, 2020
The versatility of piezoelectric sensors in measurement techniques and their performance in applications has given rise to an increased interest in their use for structural and manufacturing component monitoring.
Casbas-Gimenez, Jesus   +5 more
core   +4 more sources

Figure of Merit Enhancement of Laterally Vibrating RF-MEMS Resonators via Energy-Preserving Addendum Frame

open access: yesMicromachines, 2022
This paper examines a new technique to improve the figure of merit of laterally vibrating RF-MEMS resonators through an energy-preserving suspended addendum frame structure using finite element analysis. The proposed suspended addendum frame on the sides
Temesgen Bailie Workie   +4 more
doaj   +1 more source

research Paper: Investigation of the Effect of Sm3+ Doping on the Piezoelectric Properties of PIN-PMN-PT Ceramics [PDF]

open access: yesفیزیک کاربردی ایران
Piezoelectric materials, such as sensors and electromechanical transducers, are widely used in applications related to electromechanical energy conversion. Among piezoelectric materials, the ferroelectric compounds of the Relaxor-PT family have attracted
Hadi Papi   +2 more
doaj   +1 more source

High Electromechanical Coupling Coefficient of Longitudinally Excited Shear Wave Resonator Based on Optimized Bragg Structure

open access: yesMicromachines, 2023
In this work, a longitudinally excited shear-wave resonator (YBAR) based on single-crystalline lithium tantalate (LiTaO3, LT) thin film is proposed. The YBAR has a 200 nm X-cut thin film and molybdenum electrode.
Zhiheng Zhang   +7 more
doaj   +1 more source

General numerical implementation of a new piezoelectric shunt tuning method based on the effective electromechanical coupling coefficient [PDF]

open access: yesMechanics of Advanced Materials and Structures, 2019
A recently proposed tuning method for resistive-inductive (RL) shunts is implemented in a commercial finite element (FE) code (ANSYS®).
Johan Frederik Toftekær   +2 more
openaire   +2 more sources

Quantum Flexoelectricity in Low Dimensional Systems

open access: yes, 2007
Symmetry breaking at surfaces and interfaces and the capability to support large strain gradients in nanoscale systems enable new forms of electromechanical coupling.
A. G. Petrov   +5 more
core   +1 more source

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