Self-sensing of dielectric elastomer actuator enhanced by artificial neural network

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Authors
Ye, Zhihang
Chen, Zheng
Advisors
Issue Date
2017-08-22
Type
Article
Keywords
Dielectric elastomer , Self-sensing , Artificial neural network
Research Projects
Organizational Units
Journal Issue
Citation
Ye, Zhihang; Chen, Zheng. 2017. Self-sensing of dielectric elastomer actuator enhanced by artificial neural network. Smart Materials and Structures, vol. 26:no. 9
Abstract

Dielectric elastomer (DE) is a type of soft actuating material, the shape of which can be changed under electrical voltage stimuli. DE materials have promising usage in future's soft actuators and sensors, such as soft robotics, energy harvesters, and wearable sensors. In this paper, a stripe DE actuator with integrated sensing capability is designed, fabricated, and characterized. Since the strip actuator can be approximated as a compliant capacitor, it is possible to detect the actuator's displacement by analyzing the actuator's impedance change. An integrated sensing scheme that adds a high frequency probing signal into actuation signal is developed. Electrical impedance changes in the probing signal are extracted by fast Fourier transform algorithm, and nonlinear data fitting methods involving artificial neural network are implemented to detect the actuator's displacement. A series of experiments show that by improving data processing and analyzing methods, the integrated sensing method can achieve error level of lower than 1%.

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Publisher
IOP Publishing
Journal
Book Title
Series
Smart Materials and Structures;v.26:no.9
PubMed ID
DOI
ISSN
0964-1726
EISSN