Toward efficient aeroelastic energy harvesting: device performance comparisons and improvements through synchronized switching

Bryant, Matthew; Schlichting, Alexander; Garcia, Ephrahim

doi:10.1117/12.2009818

Cited by 14 publications

(17 citation statements)

References 10 publications

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“…Bryant and Garcia [26,63] and coauthors [64,65,[114][115][116] are among the very first to investigate the feasibility of piezoelectric energy harvesting with airfoil flutter. An airfoil flutter based energy harvester was first reported by Bryant and Garcia [63] with both wind tunnel experimental results and theoretical predictions and further studied with a more detailed theoretical modeling process [26].…”

Section: Energy Harvesters Based On Modal Convergence Fluttermentioning

confidence: 99%

“…Experimentally, it was found that a compliant host structure reduced the cut-in wind speed, cutin frequency, and oscillation frequency during the limit cycle oscillation and shifted the peak power toward the lower wind speeds, as compared to a stiff host structure. Bryant et al [116] presented an experimental study on energy harvesting efficiency and found that the peak power density and power extraction efficiency of the flutter energy harvester occurred at the lowest wind tested, due to the small swept area of the device. At that wind speed which was near the flutter boundary, the limit cycle oscillation frequency matched the first natural frequency of the piezoelectric structure.…”

Section: Energy Harvesters Based On Modal Convergence Fluttermentioning

confidence: 99%

“…They implemented a switched resonant-power converter, which was similar to a series SSHI yet without the full wave rectifier in an oscillating piezoelectric eel. Robbins et al [44] implemented a quasi-resonant rectifier in a flapping PVDF (similar to eel), and Bryant et al [116] employed an SSDCI circuit with a separate microcontroller based peak detection system in an airfoil-based piezoelectric flutter energy harvester. De Marqui Jr. et al [106] used a resistive-inductive circuit to extract energy from a fluttering bimorph plate under cross-flow condition and showed that the power output was enhanced to about 20 times larger than the case with a pure resister in the circuit at the short circuit flutter speed and short circuit flutter frequency.…”

Section: Enhancement With Sophisticated Interfacementioning

confidence: 99%

See 2 more Smart Citations

Toward Small-Scale Wind Energy Harvesting: Design, Enhancement, Performance Comparison, and Applicability

Zhao

Yang

2017

Shock and Vibration

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The concept of harvesting ambient energy as an alternative power supply for electronic systems like remote sensors to avoid replacement of depleted batteries has been enthusiastically investigated over the past few years. Wind energy is a potential power source which is ubiquitous in both indoor and outdoor environments. The increasing research interests have resulted in numerous techniques on small-scale wind energy harvesting, and a rigorous and quantitative comparison is necessary to provide the academic community a guideline. This paper reviews the recent advances on various wind power harvesting techniques ranging between cm-scaled wind turbines and windmills, harvesters based on aeroelasticities, and those based on turbulence and other types of working principles, mainly from a quantitative perspective. The merits, weaknesses, and applicability of different prototypes are discussed in detail. Also, efficiency enhancing methods are summarized from two aspects, that is, structural modification aspect and interface circuit improvement aspect. Studies on integrating wind energy harvesters with wireless sensors for potential practical uses are also reviewed. The purpose of this paper is to provide useful guidance to researchers from various disciplines interested in small-scale wind energy harvesting and help them build a quantitative understanding of this technique.

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Section: Energy Harvesters Based On Modal Convergence Fluttermentioning

confidence: 99%

Section: Energy Harvesters Based On Modal Convergence Fluttermentioning

confidence: 99%

Section: Enhancement With Sophisticated Interfacementioning

confidence: 99%

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Toward Small-Scale Wind Energy Harvesting: Design, Enhancement, Performance Comparison, and Applicability

Zhao

Yang

2017

Shock and Vibration

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“…The two DOF designs on the other hand, can use a variety of parameters including the pitch/heave natural frequency ratio, inertial coupling parameters and flap geometry to minimize cut-in wind speed while maintaining compact size and high natural frequency, which is advantageous for efficiency [10]. In addition, a recent comparison of literature on experimental results [11] showed that a two DOF aeroelastic harvester achieved higher conversion efficiency than other aeroelastic harvesters of similar size.…”

Section: Introductionmentioning

confidence: 99%

Structural modelling of a compliant flexure flow energy harvester

Chatterjee¹,

Bryant²

2015

Smart Mater. Struct.

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CHATTERJEE, PUNNAG. Structural Modeling of a Compliant Flexure Flow Energy Harvester. (Under the supervision of Dr. Matthew Bryant). This thesis presents the concept of a flow-induced vibration energy harvester based on a one-piece compliant flexure structure. This energy harvester utilizes the aeroelastic flutter phenomenon to convert flow energy to structural vibrational energy and to electrical power output through piezoelectric transducers. This flexure creates a discontinuity in the structural stiffness and geometry that can be used to tailor the mode shapes and natural frequencies of the device to the desired operating flow regime while eliminating the need for discrete hinges that are subject to fouling and friction. An approximate representation of the flexure rigidity is developed from the flexure link geometry, and a model of the complete discontinuous structure and integrated flexure is formulated based on transfer matrix method. The natural frequencies and mode shapes predicted by the model are validated using finite element simulations and are shown to be in close agreement. A proof-of-concept energy harvester incorporating the proposed flexure design has been fabricated and investigated in wind tunnel testing. The aeroelastic modal convergence, critical flutter wind speed, power output and limit cycle behavior of this device is experimentally determined and discussed.

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“…The equations of motion of the EH system were used to calculate the linear flutter speed and the effects of flow velocity on flutter frequency and power output [58]. Methods for expanding the operating envelope of the power harvester and reducing the linear flutter speed were proposed [34,117,118].…”

Section: Limit Cycle Oscillations Of Wing Sectionsmentioning

confidence: 99%

Energy harvesting by means of flow-induced vibrations on aerospace vehicles

Ronch

et al. 2016

Progress in Aerospace Sciences

140

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This paper reviews the design, implementation, and demonstration of energy harvesting devices that exploit flow-induced vibrations as the main source of energy.Starting with a presentation of various concepts of energy harvesters that are designed to benefit from a general class of flow-induced vibrations, specific attention is then given at those technologies that may offer, today or in the near future, a potential benefit to extend the operational capabilities and to monitor critical parameters of

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Toward efficient aeroelastic energy harvesting: device performance comparisons and improvements through synchronized switching

Cited by 14 publications

References 10 publications

Toward Small-Scale Wind Energy Harvesting: Design, Enhancement, Performance Comparison, and Applicability

Toward Small-Scale Wind Energy Harvesting: Design, Enhancement, Performance Comparison, and Applicability

Structural modelling of a compliant flexure flow energy harvester

Energy harvesting by means of flow-induced vibrations on aerospace vehicles

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