Experimental implementation of a cantilevered piezoelectric energy harvester with a dynamic magnifier

Arafa, Mustafa; Akl, W.; Aladwani, A.; Aldraihem, Osama J.; Baz, A.

doi:10.1117/12.880689

Cited by 46 publications

(47 citation statements)

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“…Ma et al [13] and Lee et al [14] improved the energy harvesting efficiency by introducing additional masses on the vibration energy harvesting beams to harvest the energy in the higher vibration modes as well as the fundamental bending mode. Baz et al [15][16][17] also demonstrated the effectiveness of the dual-mass harvester with piezoelectric transducers by both numerical simulations and experiments. Wei et al [18] proposed a harvester with three masses in parallel, providing broader bandwidth to increase the energy harvesting efficiency from ambient vibration.…”

Section: Introductionmentioning

confidence: 90%

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Enhanced vibration energy harvesting using dual-mass systems

Tang

Zuo

2011

Journal of Sound and Vibration

160

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Section: Introductionmentioning

confidence: 90%

“…(18) into Eq. (17). The local maximum power also depends on the mass ratio m and frequency tuning ratio f. When the tuning ratio is fixed as f ¼1.…”

Section: Dual-mass Vibration Energy Harvestermentioning

confidence: 99%

Enhanced vibration energy harvesting using dual-mass systems

Tang

Zuo

2011

Journal of Sound and Vibration

160

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“…To overcome that drawback, some researchers have considered the use of two-degree-of-freedom (2DOF) models to achieve two close resonances for wider bandwidth. Aldraihem and Baz (2011) and Arafa et al (2011) proposed a 2DOF piezoelectric energy harvester (PEH) model comprising a piezoelectric harvester and an additional spring-mass system installed between the harvester and the base. The additional spring-mass system served as a dynamic magnifier to enhance the power output and meanwhile achieve a wider bandwidth.…”

Section: Introductionmentioning

confidence: 99%

A 2DOF hybrid energy harvester based on combined piezoelectric and electromagnetic conversion mechanisms

Wang

Tang

Guo

et al. 2014

J. Zhejiang Univ. Sci. A

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Abstract:This paper presents a two-degree-of-freedom (2DOF) hybrid piezoelectric-electromagnetic energy harvester (P-EMEH). Such a 2DOF system is designed to achieve two close resonant frequencies. The combined piezoelectricelectromagnetic conversion mechanism is exploited to further improve the total power output of the system in comparison to a stand-alone piezoelectric or electromagnetic conversion mechanism. First, a mathematical model for the 2DOF hybrid P-EMEH is established. Subsequently, the maximal power output of the 2DOF hybrid P-EMEH is compared both experimentally and theoretically with those from the 1DOF piezoelectric energy harvester (PEH), 1DOF electromagnetic energy harvester (EMEH), 2DOF PEH, and 2DOF EMEH. Based on the validated mathematical model, the effect of the effective electromechanical coupling coefficients (EMCC) on the maximal power outputs from various harvester configurations is analyzed. The results indicate that for the 2DOF hybrid P-EMEH, although the increase of the power output from one electromechanical transducer will lead to the decrease of the power output from the other, the overall performance of the system is improved in weak and medium coupling regimes by increasing electromechanical coupling. In weak and medium coupling scenarios, the hybrid energy harvester configuration is advantageous over conventional 1DOF or 2DOF harvester configurations with a stand-alone conversion mechanism.

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“…Thus, modeling of right-angle beam 21 and dualbeam 22,23 systems have been specific to those studies and presented greater emphasis on maximizing the harvested power as opposed to vibration suppression of the purely elastic sub-structure. Reference 24 formulated dimensionless power equations for a dual-mass harvester concept but did not also consider the simultaneous vibration control problem.…”

Section: Introductionmentioning

confidence: 99%

Theoretical investigations of energy harvesting efficiency from structural vibrations using piezoelectric and electromagnetic oscillators

Harne

2012

The Journal of the Acoustical Society of America

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Conversion of ambient vibrational energy into electric power has been the impetus of much modern research. The traditional analysis has focused on absolute electrical power output from the harvesting devices and efficiency defined as the convertibility of an infinite resource of vibration excitation into power. This perspective has limited extensibility when applying resonant harvesters to host resonant structures when the inertial influence of the harvester is more significant. Instead, this work pursues a fundamental understanding of the coupled dynamics of a main mass-spring-damper system to which an electromagnetic or piezoelectric mass-spring-damper is attached. The governing equations are derived, a metric of efficiency is presented, and analysis is undertaken. It is found that electromagnetic energy harvesting efficiency and maximum power output is limited by the strength of the coupling such that no split system resonances are induced for a given mass ratio. For piezoelectric harvesters, only the coupling strength and certain design requirements dictate maximum power and efficiency achievable. Since the harvesting circuitry must "follow" the split resonances as the piezoelectric harvesters become more massive, the optimum design of piezoelectric harvesters appears to be more involved than for electromagnetic devices.

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Experimental implementation of a cantilevered piezoelectric energy harvester with a dynamic magnifier

Cited by 46 publications

References 0 publications

Enhanced vibration energy harvesting using dual-mass systems

Enhanced vibration energy harvesting using dual-mass systems

A 2DOF hybrid energy harvester based on combined piezoelectric and electromagnetic conversion mechanisms

Theoretical investigations of energy harvesting efficiency from structural vibrations using piezoelectric and electromagnetic oscillators

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