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Proceedings Paper

A distributed model of IPMC
Author(s): A. Punning; U. Johanson; M. Anton; M. Kruusmaa; A. Aabloo
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Paper Abstract

This paper presents a distributed model of an IPMC (Ionomeric Polymer-Metal Composite). Unlike other electromechanical models of an IPMC, the distributed nature of our model permits modelling the non-uniform bending of the material. Instead of modeling solely the tip deflection of the material, we model the changing curvature. Our model of the IPMC describes the actuator or sensor as a distributed one-dimensional RC transmission line. The behavior of the IPMC at its each particular position in time-domain is described by a system of Partial Differential Equations. (PDE). The parameters of the PDE-s have a clear physical interpretation: the conductivity of the electrodes, the pseudocapacitance of the arising double-layer at the boundary of the electrodes, the electric current caused by electrode reactions etc. The electromechanical coupling between the electrical parameters and the bending motion is implemented by means of distribution of electric current along the material in a time domain. The distributed nature of the model permits predicting the non-uniform bending of the IPMC actuators in time domain or to reconcile the output of an IPMC-based position sensor with its shape. Taking into account several nonlinear parameters, the model is consistent with the experimental results even when the inflexion of the actuator or sensor is large or the water electrolysis appears.

Paper Details

Date Published: 10 April 2008
PDF: 10 pages
Proc. SPIE 6927, Electroactive Polymer Actuators and Devices (EAPAD) 2008, 69270G (10 April 2008); doi: 10.1117/12.775631
Show Author Affiliations
A. Punning, Tartu Univ. (Estonia)
U. Johanson, Tartu Univ. (Estonia)
M. Anton, Tartu Univ. (Estonia)
M. Kruusmaa, Tartu Univ. (Estonia)
A. Aabloo, Tartu Univ. (Estonia)

Published in SPIE Proceedings Vol. 6927:
Electroactive Polymer Actuators and Devices (EAPAD) 2008
Yoseph Bar-Cohen, Editor(s)

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