Comparison of dynamic characteristics of active sensing methods of Ionic Polymer Metal Composite (IPMC)
Wanhasbullah Mohdisa (Universiti Malaysia Pahang, TU Delft - Mechanical Engineering)
Andres Hunt (TU Delft - Mechanical Engineering)
S. Hassan Hosseinnia (TU Delft - Mechanical Engineering)
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Abstract
Limitations of conventional actuators and sensors in small-scaled and complex devices have diverted the researches' attentions towards smart material transducers such as ionic polymer-metal composites (IPMCs). In addition to actuation capabilities, IPMCs generate voltage when subjected to mechanical deformation. Utilization of IPMCs as sensors has been studied much less than IPMC actuation, and direct comparison of sensing methods is required for efficient implementation. This paper characterizes IPMC active sensing methods i.e. voltage, current, and charge in terms of frequency responses, coherence, noise, and repeatability. IPMC is excited mechanically between 0.08 Hz and 60 Hz under identical experimental conditions, while signal and displacement are measured. The results provide an absolute comparison for IPMC active sensing dynamic methods, for a typical IPMC (Nafion, Pt, Na+).