Ambient vibrations piezoelectric harvester array with discrete multiple low frequencies (original) (raw)

Abstract

This work presents an approach to enhance kinetic energy harvesting from low multi-frequency discrete ambient vibrations. It is based on an array of three piezoelectric harvesters each with a certain resonant frequency that is triggered at a specific frequency in the vibration environment. The harvesters used in this work are of commercially available cantilever beam type. During operation, each harvester is modeled as a voltage source with a resistance and a capacitance load (i.e., RC circuit). Theoretical analysis are presented and checked against experimental work and good agreements are found. The proposed approach discretely broadens the frequency band of power harvesting and makes it more efficient and more suitable for practical ambient power harvesting implementations.

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  16. Hz Harv. (From Exp.)
  17. Hz Harv. (From Sim.)
  18. Hz Harv. (From Exp.) 53.4 Hz Harv (From Sim.) 53.4 Harv (From Exp.