Abstract:Copyright by the AIP Publishing. Arrieta, A. F.; Hagedorn, P.; Erturk, A.; et al., "A piezoelectric bistable plate for nonlinear broadband energy harvesting," Appl. Phys. Lett. 97, 104102 (2010); http://dx
“…Many investigations have focused on ambient vibration-based energy harvesting. [1][2][3][4][5][6] On the other hand, harvesting energy from fluid flows at low speed is desirable in many applications including the deployment of self-powered sensors or batteries in buildings, rivers, and airstreams. Several recent studies [7][8][9][10][11][12][13] have focused on the conversion of aeroelastic vibrations in airfoil sections to electrical power.…”
A.; Scanlon, J. M.; McDowell, E.; et al., "Performance enhancement of piezoelectric energy harvesters from wake galloping," Appl. Phys. Lett. 103, 033903 (2013); http:// dx
“…Many investigations have focused on ambient vibration-based energy harvesting. [1][2][3][4][5][6] On the other hand, harvesting energy from fluid flows at low speed is desirable in many applications including the deployment of self-powered sensors or batteries in buildings, rivers, and airstreams. Several recent studies [7][8][9][10][11][12][13] have focused on the conversion of aeroelastic vibrations in airfoil sections to electrical power.…”
A.; Scanlon, J. M.; McDowell, E.; et al., "Performance enhancement of piezoelectric energy harvesters from wake galloping," Appl. Phys. Lett. 103, 033903 (2013); http:// dx
“…In recent years few possible candidates have been explored (Cottone et al, 2009;Gammaitoni et al, 2009, Ferrari M. et al, 2009, Arrieta A.F. et al, 2010, Ando B. et al, 2010, Barton D.A.W.…”
Section: The Nonlinear Oscillator Approach: Performances and Limitationsmentioning
“…Typically, a vibration energy harvester delivers maximum power to a matched load only if its resonant frequency matches ambient vibration frequency and power flow decreases as the resonant frequency decreases [5,6]. But unfortunately, ambient vibrations are of low frequencies with eccentric nature which may drift over time [7]. A conventional piezoelectric vibration energy harvester is designed as a single-degree-of-freedom (SDOF) model in the form of a single mass-loaded cantilever beam (made of either a piezoelectric bimorph or a piezoelectric layer attached to a non-piezoelectric layer) which is efficient at its 1st resonance mode; 2nd and higher resonance modes with comparatively low response levels occur in excessively high frequencies and are generally ignored.…”
-We present a piezoelectric energy harvester with stopper-engaged dynamic magnifier which is capable of significantly increasing the operating bandwidth and the energy (power) harvested from a broad range of low frequency vibrations (<30 Hz). It uses a mass-loaded polymer beam (primary spring-mass system) that works as a dynamic magnifier for another mass-loaded piezoelectric beam (secondary spring-mass system) clamped on primary mass, constituting a two-degree-of-freedom (2-DOF) system. Use of polymer (polycarbonate) as the primary beam allows the harvester not only to respond to low frequency vibrations but also generates high impulsive force while the primary mass engages the base stopper. Upon excitation, the dynamic magnifier causes mechanical impact on the base stopper and transfers a secondary shock (in the form of impulsive force) to the energy harvesting element resulting in an increased strain in it and triggers nonlinear frequency up-conversion mechanism. Therefore, it generates almost four times larger average power and exhibits over 250% wider half-power bandwidth than those of its conventional 2-DOF counterpart (without stopper). Experimental results indicate that the proposed device is highly applicable to vibration energy harvesting in automobiles.
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