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A low profile vibro-impacting energy harvester with symmetrical stops
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View: Figures


Image of FIG. 1.
FIG. 1.

Vibro-impacting oscillator with seismic-mass .

Image of FIG. 2.
FIG. 2.

Schematics showing (a) a perspective drawing of the vibro-impacting energy harvester frame, (b) a side-elevation of the main-cantilever and the two symmetrical piezoelectric bimorph-stops, and also the stop-gap , and (c) a plan view of a bimorph-stop.

Image of FIG. 3.
FIG. 3.

COMSOL modeled eigenmodes of the energy harvesters main-cantilever, (a) first bending mode at 101.3 Hz, (b) first torsional mode at 315.9 Hz.

Image of FIG. 4.
FIG. 4.

Measured displacement of the harvester’s main-cantilever.

Image of FIG. 5.
FIG. 5.

Impact location where the seismic-mass collides with a bimorph-stop.

Image of FIG. 6.
FIG. 6.

(a) Experimental arrangement and (b) electrical load with .

Image of FIG. 7.
FIG. 7.

Measured (a) displacement of the seismic-mass and of a bimorph-stop near to the impact location with the bimorphs in an open-circuit condition, (b) bimorph-stop open-circuit voltage where “inner” and “outer,” respectively, refers to the bimorph-stop closest and furthest away from the host-mass, and (c) the mean load power with an optimized resistive load.


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Scitation: A low profile vibro-impacting energy harvester with symmetrical stops