Piezoelectric transduction has received great attention for vibration-to-electric energy conversion over the last five years. A typical piezoelectric harvester is a unimorph or bimorph cantilever located on vibrating host structure, to generate electrical from base excitations. Several authors have investigated modeling of cantilevered harvesters under excitation. The existing mathematical approaches range elementary single-degree-of-freedom models approximate distributed parameter solutions...

Cantilevered beams with piezoceramic layers have been frequently used as piezoelectric vibration energy harvesters in the past five years. The literature includes several single degree-of-freedom models, a few approximate distributed parameter models and even some incorrect approaches for predicting electromechanical behavior of these harvesters. In this paper, we present exact analytical solution cantilevered harvester Euler–Bernoulli beam assumptions. excitation is assumed to be due its...

This letter introduces a piezomagnetoelastic device for substantial enhancement of piezoelectric power generation in vibration energy harvesting. Electromechanical equations describing the nonlinear system are given along with theoretical simulations. Experimental performance generator exhibits qualitative agreement theory, yielding large-amplitude periodic oscillations excitations over frequency range. Comparisons presented against conventional case without magnetic buckling and superiority...

Cantilevered beams with piezoceramic (PZT) layers are the most commonly investigated type of vibration energy harvesters. A frequently used modeling approach is single-degree-of-freedom (SDOF) harvester beam as it allows simple expressions for electrical outputs. In literature, since base excitation on assumed to be harmonic, well known SDOF relation employed mathematical modeling. this study, shown that accepted harmonic may yield highly inaccurate results predicting motion cantilevered and...

Recently, the idea of using nonlinearity to enhance performance vibration-based energy harvesters has been investigated. Nonlinear harvesting devices have shown be capable operating over wider frequency ranges delivering more power than their linear counterparts, rendering them suitable for real applications. In this paper, we propose exploit rich nonlinear behavior a bistable composite plate with bonded piezoelectric patches broadband harvesting. The response structure is experimentally...

The idea of vibration-to-electric energy conversion for powering small electronic components by using the ambient vibration has been investigated researchers from different disciplines in last decade. Among possible transduction mechanisms, piezoelectric received most attention converting vibrations to useful electrical energy. In five years, there have a considerable number publications various models electromechanical behavior harvester beams. used literature range elementary...

Cantilevered piezoelectric energy harvesters have been extensively investigated in the literature of harvesting. As an alternative to conventional cantilevered beams, this article presents L-shaped beam-mass structure as a new harvester configuration. This can be tuned first two natural frequencies relatively close each other, resulting possibility broader band harvesting system. describes important features configuration and develops linear distributed parameter model for predicting...

This paper investigates the concept of piezoaeroelasticity for energy harvesting. The focus is placed on mathematical modeling and experimental validations problem generating electricity at flutter boundary a piezoaeroelastic airfoil. An electrical power output 10.7 mW delivered to 100 kΩ load linear speed 9.30 m/s (which 5.1% larger than short-circuit speed). effect piezoelectric generation also discussed useful consequence having nonlinearities in system addressed.

We investigate a magnetically coupled nonlinear piezoelectric energy harvester by altering the angular orientation of its external magnets for enhanced broadband frequency response. Electromechanical equations describing dynamic behavior include an experimentally identified polynomial transverse magnetic force that depends on magnet angle. Up- and down-sweep harmonic excitation tests are performed at constant acceleration over range 0–25 Hz. Very good agreement is observed between numerical...

A two-stage power conditioning circuit consisting of an AC-DC converter followed by a DC-DC is proposed for vibration-based energy harvesting system. The intends to maximize the amount extracted from piezoelectric harvester matching source impedance with adaptively adjusting duty cycle. An equivalent electrical representation derived distributed-parameter model adapted enable method here. For given harvester, there theoretical maximum output that determined mechanical damping, base...

Elastic/acoustic metamaterials made from locally resonant arrays can exhibit bandgaps at wavelengths much longer than the lattice size for various applications spanning low-frequency vibration/sound attenuation to wave guiding and filtering in mechanical electromechanical devices. For an effective use of such metamaterial concepts finite structures, it is required bridge gap between dispersion characteristics modal behavior host structure with its resonators. To this end, we develop a novel...

Enhancement of structure-borne wave energy harvesting is investigated by exploiting metamaterial-based and metamaterial-inspired electroelastic systems. The concepts focusing, localization, funneling are leveraged to establish novel metamaterial harvester (MEH) configurations. MEH systems transform the incoming into electrical coupling domains. component work employs piezoelectric transduction due high power density ease application offered materials. Therefore, in all configurations studied...

Elastic waveguides with time-modulated stiffness feature a frequency-periodic dispersion spectrum, where branches merge at multiple integers of half the modulation frequency and over finite wave number range. In this range, becomes complex, its real part remaining constant. The vanishing group velocity associated these flat bands leads to frequency-selective reflection an interface between nonmodulated medium one, which converts broadband input into narrow-band output centered frequency....

We propose and experimentally validate a first-principles based model for the nonlinear piezoelectric response of an electroelastic energy harvester. The analysis herein highlights importance modeling inherent nonlinearities that are not limited to higher order elastic effects but also include coupling power harvesting circuit. Furthermore, damping mechanism is shown accurately restrict amplitude bandwidth frequency response. linear framework widely accepted theoretical investigations...

For the past five years, cantilevered beams with piezoceramic layer(s) have been frequently used as piezoelectric energy harvesters for vibration-to-electric conversion. Typically, harvester beam is located on a vibrating host structure and dynamic strain induced in results an alternating voltage output across electrodes. Vibration modes of other than fundamental mode certain nodes where distribution changes sign direction length. It theoretically explained experimentally demonstrated this...