 | | Mechanics of Solids
A Journal of Russian Academy of Sciences | | Founded
in January 1966
Issued 6 times a year
Print ISSN 0025-6544
Online ISSN 1934-7936 |
Archive of Issues
| Total articles in the database: | | 12788 |
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| In English (Mech. Solids): | | 4760 |
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| A.A. Pan'kov, "Membrane Piezoelectric MDS Actuator with a Flat Double Helix of Interacting Electrodes," Mech. Solids. 59 (2), 664-678 (2024) |
| Year |
2024 |
Volume |
59 |
Number |
2 |
Pages |
664-678 |
| DOI |
10.1134/S0025654423601349 |
| Title |
Membrane Piezoelectric MDS Actuator with a Flat Double Helix of Interacting Electrodes |
| Author(s) |
A.A. Pan'kov (Perm National Research Polytechnic University, Perm, 614990 Russia, a_a_pankov@mail.ru) |
| Abstract |
A schematic diagram and mathematical model of the functioning of a new piezoelectric
membrane (MDS) actuator with double spirals (DS) electrodes on the upper and/or lower surfaces of
a thin piezoelectric layer with axisymmetric and periodic (small period) reciprocal electric polarization along the radial coordinate are presented. The polarization of the layer is carried out as a result of
connecting the polarizing value of the electrical voltage to the outputs of the double spirals of the electrodes. The electrodes of each (upper and lower) double helix of the MDS actuator are made in the
form of electroded tape coatings on the surfaces of the piezoelectric layer in close proximity to each
other (due to the small pitch of the helix) to create high electric field strengths along the field lines in
local areas of the piezoelectric layer between them when connecting an alternating or direct control
electrical voltage to the electrodes, in particular, with positive and negative values of electrical potentials. It is important that the electric field lines and, as a consequence, the polarization of the piezoelectric layer of the MDS actuator are oriented mainly along (i.e., towards or against) the radial coordinate of the membrane, in contrast to many traditional actuator schemes. The results of numerical
simulation for a round elastic membrane with piezoelectric actuators installed on its upper and lower
surfaces confirmed the effectiveness of the proposed piezoelectric MDS actuator when operating
according to the “bimorph” scheme, including using the proposed new structural element (section) - piezoelectric MDS- “compression rings” for various geometric and control parameters. The effect of
a significant increase in the deflection of the membrane with installed piezoelectric MDS actuators
was revealed compared to the use of traditional homogeneous plate piezoelectric actuators of the
bimorph type for various conditions of fastening the membrane, in particular, stationary (rigid) fastening of its center. For a hybrid piezoelectric MDS actuator, including independent concentric circular and annular (i.e., “pressure ring”) sections, a non-monotonic character was revealed and a
numerical analysis was carried out of the nonlinear dependence of the largest deflection in the center
of a membrane hinged and fixed at the edge on the radius ratio its circular and annular MDS sections.
Cases have been identified in which the “pressure ring” effect manifests itself, i.e. when the maximum
deflection of a membrane with a “pressure ring” exceeds the best possible deflection of this membrane
without using it according to the traditional “bimorph” scheme. The new piezoelectric MDS actuator
can be used in micromechanics, controlled optics, sensor technology, acoustics, in particular, in the
manufacture of piezoelectric acoustic or membrane-type sensor elements, electromechanical transducers for collecting vibration energy. |
| Keywords |
piezoelectric MDS actuator, double helix electrodes, bimorph, membrane bending, initial load, pressure ring, numerical modeling |
| Received |
20 June 2023 | Revised |
27 July 2023 | Accepted |
31 July 2023 |
| Link to Fulltext |
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