Design and characterization of a fractal-inspired multi-frequency piezoelectric energy converter

Davide Castagnetti


A promising harvesting technique, in terms of simplicity and efficiency, is the conversion ofambient kinetic energy through piezoelectric materials. This work aims to design and investigate a piezoelectricconverter conform to a fractal-inspired, multi-frequency structure previously presented by the author. Aphysical prototype of the converter is built and experimentally examined, up to 120 Hz, in terms of modalresponse and power output. Three eigenfrequencies are registered and the power output is particularly good atthe fundamental eigenfrequency. Also the effect of the resistive load applied to the converter is investigated.

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