Results 251 to 260 of about 944,754 (292)

Electromechanical Coupling of PZT Nanofibers

Volume 13: Nano-Manufacturing Technology; and Micro and Nano Systems, Parts A and B, 2008
This paper presented the results of electromechanical characterization of PZT nanofibers through applied mechanical strain and forced vibration. PZT nanofibers were fabricated by electrospinning process. Titanium film with ZrO2 layer was used to collect the nanofibers and also used as the substrates of the test coupons for the bending tests. Mechanical
Shiyou Xu, Yong Shi
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Invariants of electromechanical coupling coefficients in piezoceramics

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2003
The relationships between coefficients of electromechanical coupling (CEMC) of various types of piezoceramic resonator (PR) vibrations are considered. Being constant for a given piezoceramic state, the range of variation of piezoceramics dielectric permittivity from a mechanically "free" condition at relatively low frequencies up to an "overall clamped"
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Electromechanical coupling in a biopolymer gel

Polymer, 1992
Experiments on electromechanical coupling in aqueous gels of the polysaccharide agarose are described. The gels are prepared as free self-supporting discs between 1 and 4.5 mm thick immersed in water and in contact with a stainless-steel electrode system on a solid substrate.
T.J Lewis, J.P Llewellyn, M.J van der Sluijs   +2 more
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Electromechanical Coupled Free Vibration for Electromechanical Integrated Toroidal Drive

2006 2nd IEEE/ASME International Conference on Mechatronics and Embedded Systems and Applications, 2006
In this paper, based on electromechanical coupled dynamic equations of the drive system, the natural frequencies and vibration modes of the drive system are investigated. The vibration modes of the mechanical system of the drive are classified into rotational modes, planet modes and single planet modes.
Lizhong Xu, Xiuhong Hao
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Symmetry in the Equations for Electromechanical Coupling

The Journal of the Acoustical Society of America, 1950
The conventional forms of the electromechanical coupling equations exhibit symmetry for electrostatic coupling and antisymmetry for electromagnetic coupling, or vice versa. Both types of coupling can be represented in symmetrical form, however, if the transduction coefficient for electromagnetic coupling includes a space-operator k that embodies the ...
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Particle Swarm Optimization of Coupled Electromechanical Systems

IEEE Transactions on Magnetics, 2010
This work investigates the feasibility of utilizing an electromagnetic-team fuzzy logic (EM-TFL) robust identifier for use with the particle swarm optimization technique to increase the efficiency and fuel economy of a hybrid electric vehicle (HEV) powertrain system in series configuration. This optimization necessitates the characterization of the key
N. Al-Aawar, T. M. Hijazi, A. A. Arkadan
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Duality in the Electromechanical-Coupling Factor

The Journal of the Acoustical Society of America, 1963
Two electromechanical-coupling factors are distinguished in order to account for the behavior of transducers at low frequencies, as well as in the vicinity of mechanical resonance. The existence of the two coupling factors requires that the equivalent circuit be reinterpreted but not revised.
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Electromechanical coupling in electrostatic kinetic energy harvesters

2016 IEEE International Conference on Electronics, Circuits and Systems (ICECS), 2016
Almost all kinetic energy harvester (KEHs) are inherently nonlinear. In addition, most practical systems introduce supplementary nonlinearity to improve their performance. Qualitatively and quantitatively understanding the nonlinear behaviour in these devices can highlight important parameters with regard to optimisation and design.
Eoghan O'Riordan, Elena Blokhina, Dimitri Galayko   +2 more
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Electromechanical Coupling and Composite Transducers

The Journal of the Acoustical Society of America, 1963
Measurements with composite types of transducers indicate that both the classical definition of the electromechanical coupling factor and the equivalent circuit for a piezoelectric transducer require revisions for improved consistency. The effective coupling coefficient depends on the proportion of the piezoelectric material that is employed ...
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Coupling of photomechanical and electromechanical actuations in carbon nanotubes

Nanotechnology, 2013
It is known that carbon nanotubes (CNTs) possess multifunctional characteristics, which are applicable for a wide variety of engineering applications. CNT is also recognized as a radiation sensitive material, for example for detecting infrared (IR) radiations. One of the direct implications of exposing CNTs to radiation is the photomechanical actuation
Ashish, Suri, Abha, Misra
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