Vibro-Impact Dynamics of a Piezoelectric Energy Harvester

Mak, Kuok H.; McWilliam, Stewart; Popov, Atanas A.; Fox, Colin

doi:10.1007/978-1-4419-9716-6_25

Cited by 8 publications

(8 citation statements)

References 7 publications

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“…To expand bandwidth toward the high frequencies (100 Hz), mechanical stops can be used in which an excited harvester bounces between the two rigid stops. These vibro-impact techniques only displayed optimal results in the presence of large excitation amplitudes [22][23][24]. Through active tuning approaches, harvesters have been designed to sense the ambient frequency and modify physical properties of the harvesting device [25].…”

Section: Improvements Through Novel Circuitry and Mechanicalmentioning

confidence: 99%

Chaotification as a Means of Broadband Energy Harvesting With Piezoelectric Materials

Geiyer

Kauffman

2015

Journal of Vibration and Acoustics

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Component miniaturization and reduced power requirements in sensors have enabled growth in the field of low-power ambient vibration energy harvesting. This work aims to increase bandwidth and power output beyond current techniques by inducing chaotic nonlinear phenomena and applying a low-power controller based on the method of Ott, Grebogi, and Yorke (OGY) to stabilize a chosen periodic orbit. Previously, researchers used a nonlinear piezomagnetoelastic beam in search of a large amplitude broadband voltage response, but chaos was strictly avoided. These large amplitude responses can deteriorate over time into low energy chaotic oscillations. Including chaos as a desirable property allows small perturbations to alter the behavior of a system dramatically, improving the dynamic response for energy harvesting. The nonlinear piezomagnetoelastic beam element described by a Duffing oscillator is extended to embrace chaotic motion more actively. By driving motion along a chaotic attractor, even single frequency excitation results in a theoretically infinite number of unstable periodic orbits that can be stabilized using small control inputs. The chosen orbit will be accessible from a large range of excitation frequencies and can be dynamically changed in real-time, potentially expanding the bandwidth of operation.

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Section: Improvements Through Novel Circuitry and Mechanicalmentioning

confidence: 99%

Chaotification as a Means of Broadband Energy Harvesting With Piezoelectric Materials

Geiyer

Kauffman

2015

Journal of Vibration and Acoustics

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“…11 and Mak et al. 21 For the upper and lower stack, the potential energy of the springs is given to the following form where K is the spring stiffness and c1 and c2 are the impact coefficients that are considered to be 1 for the impacting mode and 0 for the no constrained mode.…”

Section: Modeling Of the Piezoelectric Energy Harvestermentioning

confidence: 99%

Vibro-impact energy harvester with optimal kinetic and elastic energies absorption

Khatami

Dardel

2021

Proceedings of the Institution of Mechanical Engineers, Part K:

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Many vibrating energy harvesters convert elastic or strain energy to electricity, while the energy of the structure is mainly distributed between potential and kinetic energies. The focus of the present work is on maximizing energy harvesting of the structure through the optimal energy absorption of its mechanical energy. The collision mechanism is used for this purpose. Primary piezoelectric harvester on the main structure and secondary piezoelectric harvester utilizing impact force in the form of harvesting beam used for this purpose. The results show that there is a significant increase in energy absorption and bandwidth. The effect of different geometrical and mechanical parameters on the system's efficiency is investigated. Experimental validation is presented to evaluate the theoretically obtained results. The presented mechanism gives up to 80 times improvement in the harvested power.

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“…As shown in Figure 7, the membrane can be treated as consisting of two parts. The part shown by a solid line adheres to the ball, hence, its area is the same as the surface area of the contact part of the ball, denoted as 31 A . The part shown by a dashed line, whose area is 32 A , is tangential to the ball and has an angle of  to the original membrane plane.…”

Section: Q Q mentioning

confidence: 99%

Energy harvesting from a DE-based dynamic vibro-impact system

Yurchenko

Val

Lai

et al. 2017

Smart Mater. Struct.

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Dielectric elastomer (DE) generators may be used in harvesting energy from ambient vibrations. Based on existing research on the mechanical properties of a circular DE membrane, a DEbased dynamic vibro-impact system is proposed in this paper to convert vibrational energy into electrical one. The dimensional, electrical and dynamic parameters of the DE membrane are analysed and then used to numerically estimate the output voltage of the proposed system. The system output performances under harmonic excitation are further discussed. At last, the comparison study has been conducted with an electromagnetic energy harvesting system, served as a "shaking" flashlight.

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Vibro-Impact Dynamics of a Piezoelectric Energy Harvester

Cited by 8 publications

References 7 publications

Chaotification as a Means of Broadband Energy Harvesting With Piezoelectric Materials

Chaotification as a Means of Broadband Energy Harvesting With Piezoelectric Materials

Vibro-impact energy harvester with optimal kinetic and elastic energies absorption

Energy harvesting from a DE-based dynamic vibro-impact system

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