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Advances in Materials Science and Engineering
Volume 2013 (2013), Article ID 683041, 17 pages
http://dx.doi.org/10.1155/2013/683041
Research Article

Electromechanical Characterization and Locomotion Control of IPMC BioMicroRobot

Applied Sciences Department, REPARTI Center, University of Quebec at Chicoutimi, Chicoutimi, QC, Canada G7H 2B1

Received 22 June 2013; Accepted 6 September 2013

Academic Editor: Kean Aw

Copyright © 2013 Martin J.-D. Otis. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper presents the electromechanical characterization of Nafion-Pt microlegs for the development of an insect-like hexapod BioMicroRobot (BMR). BMR microlegs are built using quasi-cylindrical Nafion-Pt ionomeric polymer-metal composite (IPMC), which has 2.5 degrees of freedom. The specific manufacturing process using a laser excimer for one leg in three-dimensional configurations is discussed. Dynamic behavior and microleg characteristics have been measured in deionized water using a laser vibrometer. The use of the laser vibrometer shows the linear characteristics between the duty cycle of square wave input and displacement rate of the actuator at multiple frequencies. This linearity is used to design a servo-system in order to reproduce insect tripod walking. As well, BMR current consumption is an important parameter evaluated for each leg. Current passing throughout the IPMC membrane can result in water electrolysis. Four methods are explained for avoiding electrolysis. The hardware test bench for measurements is presented. The purpose of this design is to control a BMR for biomedical goals such as implantation into a human body. Experimental results for the proposed propulsion system are conclusive for this type of bioinspired BMR.