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Open AccessArticle

A Compact Ionic Polymer Metal Composite (IPMC) System with Inductive Sensor for Closed Loop Feedback

Department of Mechanical Engineering, University of Auckland, Auckland 1010, New Zealand
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Academic Editor: Delbert Tesar
Actuators 2015, 4(2), 114-126; https://doi.org/10.3390/act4020114
Received: 13 March 2015 / Revised: 13 May 2015 / Accepted: 14 May 2015 / Published: 19 May 2015
(This article belongs to the Special Issue Feature Papers)
Ionic polymer metal composite (IPMC), of which a low actuating voltage (<5 V), high power efficiency and biocompatibility makes it a proven candidate for low power devices. However, due to its inherent nonlinear behaviour and time-variance, feedback control, as well as reliable sensing means, are required for accurate operations. This paper presents an IPMC actuator implemented with an inductive sensor to enhance the reliability and compactness of the overall device. A practical, low cost and importantly, compact inductive sensor fabricated on a printed circuit board (PCB) is proposed here. Target material selections and coil design considerations are discussed. It is experimentally determined that the inductive sensor has comparable performance to a laser sensor. Based on a proportional-integral-derivative (PID) control results the inductive sensor has demonstrated to be an alternative to a laser sensor allowing devices using IPMC actuators to be compact. View Full-Text
Keywords: IPMC; inductive sensing; PID control IPMC; inductive sensing; PID control
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Wang, J.; McDaid, A.; Sharma, R.; Aw, K.C. A Compact Ionic Polymer Metal Composite (IPMC) System with Inductive Sensor for Closed Loop Feedback. Actuators 2015, 4, 114-126.

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