Electromechanical analysis of an adaptive piezoelectric energy harvester controlled by two segmented electrodes with shunt circuit networks

Abstract

This paper presents an adaptive power harvester using shunted piezoelectric control system with segmented electrodes. This technique has spurred new capability for widening the three simultaneous resonance frequency peaks using only a single piezoelectric laminated beam where normally previous works only provide a single peak for the resonance at the first mode. The benefit of the proposed techniques is that it provides effective and robust broadband power generation for application in self-powered wireless sensor devices. The smart structure beam with proof mass offset is considered to have the simultaneous combination between vibration-based power harvesting and shunt circuit control-based electrode segments. As a result, the system spurs new development of the two mathematical methods using electromechanical closed-boundary value techniques and Ritz method-based weak form analytical approach. The two methods have been used for comparison giving accurate results. For different electrode length using certain parametric tuning and harvesting circuit systems, the technique enables the predictions of the power harvesting that can be further proved to identify the performance of the system using the effect of varying circuit parameters so as to visualize the frequency and time waveform responses.

A unified electromechanical finite element dynamic analysis of multiple segmented smart plate energy harvesters: circuit connection patterns

“…The relative transverse displacement related to the input base acceleration at any position along the smart plate structure (x,y) can be formulated using Eqs. (37) and (38)…”

“…Moreover, the effect of shunt control systembased the electrode distribution using the single piezoelectric beam structure for widening twofrequency bands and DC electrical output has been investigated using the charge-type analytical studies [36]. Most recently, the multiple segmented electrode configurations with shunt control system provided useful techniques for improving power harvesting with the multi-frequency and DC signal outputs [37]. Another trendy research effort for increasing the power harvester amplitudes for the wide ranging multi-frequency domain has also been considered as a new alternative solution by a few researchers.…”

Electromechanical finite element modelling for dynamic analysis of a cantilevered piezoelectric energy harvester with tip mass offset under base excitations

“…The piezoelectric stress field can also be formulated by differentiating equation 1 (4) Note that alternative derivations of equations (2) and (4) can also be obtained by using the enthalpy equation of state in terms of continuum thermopiezoelectricity, Maxwell's relations and Legendre's transformation [41,44].…”

System-Level Model and Simulation of a Frequency-Tunable Vibration Energy Harvester

“…In [31][32][33][34] we studied a dual-frequency piezoelectric energy harvester incorporating permanent magnets for bidirectional frequency tuning and presenting an increased useable frequency range compared to standard harvesters. Other groups used different bandwidth broadening strategies, for example, shunted piezoelectric control systems have been proposed in [35,36]. Zhang and Afzalul [37] analyzed a broadband energy harvester with an array of piezoelectric bimorphs mechanically connected through springs.…”