Abstract
Dielectric elastomers are soft actuators made of a thin layer of elastomer sandwiched between compliant electrodes. Because of the resistivity of the electrodes, the voltage is not uniform on the actuator at high frequencies. We present experimental evidence that the voltage spatial distribution is coupled to the membrane vibrations, as well as a model based on Maxwell’s equations in a moving frame to explain the coupling. The model is validated experimentally, and is used to explain the physics of the observed coupling. As a result, information on the membrane deformation can be inferred from voltage measurements, which opens self-sensing possibilities at high frequencies.
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