by Waleed Al-Ashtari, Matthias Hunstig, Tobias Hemsel, Walter Sextro
Abstract:
Piezoelectric structures are nowadays used in many different applications. A better understanding of the influence of material properties and geometrical design on the performance of these structures helps to develop piezoelectric structures specifically designed for their application. Different equivalent circuits have been introduced in the literature to investigate the behaviour of piezoelectric transducers. The model parameters are usually determined from measurements covering the characteristic frequencies of the piezoelectric transducer. This article introduces an analytical technique for calculating the mechanical and electrical equivalent system parameters and characteristic frequencies based on material properties and geometry for a cantilever bimorph structure. The model is validated by measurements using a cantilever bimorph and fits the experimental results better than previous models. The model gives a full set of piezoelectric transducer parameters and is therefore well suited for further theoretical investigations of piezoelectric transducers for different applications. The results also show that even small manufacturing tolerances have a considerable effect on the system parameters and characteristic frequencies. This might lead to intolerable deviations, especially in dynamic applications and should be avoided by careful design and production.
Reference:
Al-Ashtari, W.; Hunstig, M.; Hemsel, T.; Sextro, W.: Analytical determination of characteristic frequencies and equivalent circuit parameters of a piezoelectric bimorph. Journal of Intelligent Material Systems and Structures, volume 23, 2012.
Bibtex Entry:
@ARTICLE{Al-Ashtari2012a,
author = {Al-Ashtari, Waleed and Hunstig, Matthias and Hemsel, Tobias and Sextro,
Walter},
title = {Analytical determination of characteristic frequencies and equivalent
circuit parameters of a piezoelectric bimorph},
journal = {Journal of Intelligent Material Systems and Structures},
year = {2012},
volume = {23},
pages = {15-23},
number = {1},
abstract = {Piezoelectric structures are nowadays used in many different applications.
A better understanding of the influence of material properties and
geometrical design on the performance of these structures helps to
develop piezoelectric structures specifically designed for their
application. Different equivalent circuits have been introduced in
the literature to investigate the behaviour of piezoelectric transducers.
The model parameters are usually determined from measurements covering
the characteristic frequencies of the piezoelectric transducer. This
article introduces an analytical technique for calculating the mechanical
and electrical equivalent system parameters and characteristic frequencies
based on material properties and geometry for a cantilever bimorph
structure. The model is validated by measurements using a cantilever
bimorph and fits the experimental results better than previous models.
The model gives a full set of piezoelectric transducer parameters
and is therefore well suited for further theoretical investigations
of piezoelectric transducers for different applications. The results
also show that even small manufacturing tolerances have a considerable
effect on the system parameters and characteristic frequencies. This
might lead to intolerable deviations, especially in dynamic applications
and should be avoided by careful design and production.},
bdsk-url-1 = {http://jim.sagepub.com/content/23/1/15.abstract},
bdsk-url-2 = {http://dx.doi.org/10.1177/1045389X11430742},
doi = {10.1177/1045389X11430742},
eprint = {http://jim.sagepub.com/content/23/1/15.full.pdf+html},
file = {Al-Ashtari2012a.pdf:Al-Ashtari2012a.pdf:PDF},
timestamp = {2013.09.26},
url = {http://jim.sagepub.com/content/23/1/15.abstract}
}