Please use this identifier to cite or link to this item: doi:10.22028/D291-29761
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Title: Experimental Analysis of Continuous Vibrations in Dielectric Elastomer Membrane Actuators via Three-Dimensional Laser Vibrometry
Author(s): Nalbach, Sophie
Rizzello, Gianluca
Seelecke, Stefan
Language: English
Title: Journal of vibration and acoustics
Volume: 141
Issue: 5
Pages: 7
Publisher/Platform: American Society of Mechanical Engineers
Year of Publication: 2019
Publikation type: Journal Article
Abstract: Dielectric elastomer (DE) membrane transducers are well known for exhibiting large deformations when subject to high voltage. Furthermore, DEs are characterized by an actuation bandwidth of several kilohertz, which allows their use in high-frequency applications, e.g., acoustic ones. The frequency response of DE membranes depends on many parameters such as geometry, pre-stress, and electrode pattern. By properly designing such parameters, it is possible to control vibration modes and resonance frequencies of the membrane, opening up a number of application scenarios. Motivated by this fact, this work presents the first experimental study of continuous vibrations generated in DE membranes via high-voltage excitation. The system under investigation consists of a squared DE membrane with a circular electrode, preloaded out of plane with a linear spring. Vibrations are generated by applying a broadband high-voltage signal to the DE membrane. A 3D laser vibrometer is used to reconstruct the three-dimensional oscillations of scanning points on the membrane surface. Experimental investigations are performed to study the effects of DE geometry and pre-stress on the membrane motion, in terms of resulting frequency spectrum and vibration modes.
DOI of the first publication: 10.1115/1.4043715
URL of the first publication:
Link to this record: hdl:20.500.11880/28177
ISSN: 1048-9002
Date of registration: 23-Oct-2019
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Systems Engineering
Professorship: NT - Prof. Dr. Stefan Seelecke
Collections:UniBib – Die Universitätsbibliographie

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