This paper presents experimental and numerical modeling results for the dynamic response of a tubular dielectric elastomer sensor and actuator for the first time. Dielectric elastomers (DE) are soft polymer based smart materials that can be potentially employed in applications such as artificial muscles (prosthetics), compliant limbs and graspers for robots and aircrafts or aquatic vehicles. In our previous work, the quasi-static response of tubular DE sensors was studied [1]. Here, a theoretical model is developed to predict the dynamic response of tubular DE transducers. To this end, inertia effects are included in our previous static model which yields a system of partial differential equations. The dynamic response of the tubular DE is obtained by numerically solving the simplified PDEs using a finite difference scheme. The capacitance change induced by the dynamic deformation of the tubular DE is also calculated by a simple electrostatic model. Several tubular DE transducer samples (VHB 4905 and silicone) were fabricated and an experimental setup was developed to investigate the dynamic response by measuring capacitance and radial deformation. In the sensing experiments, a sweep of dynamic pressure profiles (0∼5Hz) are applied It is observed that silicone transducers have a larger dynamic sensing range. In the actuation experiments, the deformation of the silicone actuator is monitored while a voltage signal (4.5kV) is applied from 0∼30Hz. The silicone actuator shows a good actuation response while high voltage is applied. The comparison between numerical and experimental results for the DE transducers shows an overall error of 3%.
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ASME 2008 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
October 28–30, 2008
Ellicott City, Maryland, USA
Conference Sponsors:
- Aerospace Division
ISBN:
978-0-7918-4332-1
PROCEEDINGS PAPER
Dynamic Response of Tubular Dielectric Elastomer Sensors and Actuators Available to Purchase
S. Son,
S. Son
Virginia Polytechnic Institute and State University, Blacksburg, VA
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N. C. Goulbourne
N. C. Goulbourne
Virginia Polytechnic Institute and State University, Blacksburg, VA
Search for other works by this author on:
S. Son
Virginia Polytechnic Institute and State University, Blacksburg, VA
N. C. Goulbourne
Virginia Polytechnic Institute and State University, Blacksburg, VA
Paper No:
SMASIS2008-427, pp. 589-597; 9 pages
Published Online:
July 13, 2009
Citation
Son, S, & Goulbourne, NC. "Dynamic Response of Tubular Dielectric Elastomer Sensors and Actuators." Proceedings of the ASME 2008 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. Smart Materials, Adaptive Structures and Intelligent Systems, Volume 2. Ellicott City, Maryland, USA. October 28–30, 2008. pp. 589-597. ASME. https://doi.org/10.1115/SMASIS2008-427
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