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Proceedings Paper

Viscoelastic model of IPMC actuators
Author(s): V. Vunder; A. Punning; A. Aabloo
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Paper Abstract

One of the constraining properties of the IPMC actuators is their back-relaxation. An excited IPMC actuator, instead of holding its bent state, relaxes back towards its initial shape even when the exciting signal is a DC voltage. This behavior is reported by many authors and is usually explained with diffusion of water back, or out of the electrodes. However, a non-traditional approach to the well-known elements of the traditional viscoelastic schemes – spring and damper – results with a qualitatively new model of viscoelasticity. This mechanical analogy of viscoelastic behavior elucidates the naturalness of the back-relaxation behavior of the actuators. The model is described by a system of PDEs and gives an intuitive and accurate charge-deflection correlation with back-relaxation included. The experiments carried out with actuators of different shapes show excellent accordance with the model.

Paper Details

Date Published: 9 April 2013
PDF: 8 pages
Proc. SPIE 8687, Electroactive Polymer Actuators and Devices (EAPAD) 2013, 868723 (9 April 2013); doi: 10.1117/12.2009623
Show Author Affiliations
V. Vunder, Institute of Technology (Estonia)
A. Punning, Institute of Technology (Estonia)
A. Aabloo, Institute of Technology (Estonia)

Published in SPIE Proceedings Vol. 8687:
Electroactive Polymer Actuators and Devices (EAPAD) 2013
Yoseph Bar-Cohen, Editor(s)

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