Experimental investigations on energy harvesting performance of dielectric elastomers

2014 ◽  
Author(s):  
Yongquan Wang ◽  
Xuejing Liu ◽  
Huanhuan Xue ◽  
Hualing Chen ◽  
Shuhai Jia
Keyword(s):  
Energy Harvesting ◽  
Dielectric Elastomers ◽  
Experimental Investigations

Advantages of nonlinear energy harvesting with dielectric elastomers

2019 ◽  
Vol 442 ◽  
pp. 167-182 ◽  
Author(s):  
G. Thomson ◽  
Z. Lai ◽  
D.V. Val ◽  
D. Yurchenko
Keyword(s):  
Energy Harvesting ◽  
Dielectric Elastomers ◽  
Nonlinear Energy

A Parametrically Broadband Nonlinear Energy Harvester

2016 ◽  
Vol 139 (3) ◽  
Author(s):  
Tanju Yildirim ◽  
Mergen H. Ghayesh ◽  
Thomas Searle ◽  
Weihua Li ◽  
Gursel Alici
Keyword(s):  
Energy Harvesting ◽  
Cantilever Beam ◽  
Nonlinear Response ◽  
Energy Harvester ◽  
Shaking Table ◽  
Experimental Investigations ◽  
Dynamical Response ◽  
Parametrically Excited ◽  
Nonlinear Dynamical ◽  
Electrodynamic Shaker

In this work, for the first time, an energy harvester based on the nonlinear dynamical response of a parametrically excited cantilever beam in contact with mechanical stoppers has been fabricated and tested; a 145% increase in the bandwidth at which energy can be effectively harvested has been observed. Experimental and theoretical investigations have been performed in order to assess the increased operating bandwidth of the energy harvester fabricated; for the experimental investigations, an electrodynamic shaker connected to a shaking table has been used to parametrically stimulate the energy harvesting device. Results showed that the parametric energy harvester without stoppers displayed a weak softening-type nonlinear response; however, with the addition of mechanical stoppers the energy harvester displayed a strong hardening-type nonlinear response which is ideal for capturing kinetic energy over larger bandwidths. The addition of mechanical stoppers on a parametrically excited cantilever beam has significant qualitative and quantitative effects on the nonlinear parametric energy harvesting; the energy harvesting bandwidth was increased in the range of 35–145% by adjusting the stoppers.

scholarly journals Performance enhancement of nonlinear asymmetric bistable energy harvesting from harmonic, random and human motion excitations

2019 ◽  
Author(s):  
Chris Bowen
Keyword(s):  
Energy Harvesting ◽  
Power Output ◽  
Lower Limb ◽  
Performance Enhancement ◽  
Basin Of Attraction ◽  
Harmonic Excitation ◽  
Human Motion ◽  
Experimental Investigations ◽  
Energy Harvesters ◽  
Negative Effect

Numerical and experimental investigations of nonlinear bistable energy harvesters (BEHs) with asymmetric potential functions are presented under various excitations for performance enhancement. Basin of attraction under harmonic excitation indicates that asymmetric potentials in BEHs have negative effect on the power output. Therefore, a proper bias angle is introduced to the asymmetric potential BEHs for performance enhancement. Numerical and experimental results show that the power output is actually improved in a certain bias angle range under harmonic and random excitations. Furthermore, experiments under human motion excitation demonstrate that the asymmetric potential BEHs could perfectly combine with the asymmetric motion of lower-limb to improve the performance.

Nonlinear Energy Harvesting Using Coupled Micro-Scale Oscillator Arrays

2011 ◽  
Author(s):  
Subramanian Ramakrishnan ◽  
Manish Kumar
Keyword(s):  
Energy Harvesting ◽  
Stochastic Systems ◽  
Experimental Studies ◽  
Analytical Framework ◽  
Vibration Energy ◽  
Experimental Investigations ◽  
Small Scale ◽  
Vibration Energy Harvesting ◽  
Micro Scale ◽  
Oscillatory Systems

Vibration energy harvesting paradigms that seek to exploit the unique characteristics of nonlinear and stochastic systems are currently emerging as an important aspect of frontier research in energy sustainability. In particular, the ubiquitous nature of ambient mechanical vibrations and recent results obtained in the dynamics of micro and nano scale oscillatory systems together suggest the potential efficacy of vibration energy harvesting for the powering of small scale electronic mobile devices. In this context, the inherent advantages of using nonlinear systems over linear ones for energy harvesting are currently well established. In addition, the inherently random nature of ambient vibrations as well as the emergence of phenomena such as stochastic resonance indicates the imperativeness of a stochastic approach. Computational and experimental studies of energy harvesting involving individual nonlinear oscillators that take into account some of the above mentioned features have recently been reported in the literature. In this article, the authors present a new approach to the problem by introducing an analytical framework based on the Fokker-Planck formalism. In particular, the framework is applied to a nonlinearly coupled array of micro-scale oscillators in order to investigate the potential advantages of stochastic effects in coupled arrays for energy harvesting. The influence of varying coupling strengths as well as noise intensity on harvestable energy is studied for the case of a nonlinearly coupled micro-cantilever array. It is noted that the micro-scale arrays of the type under consideration have already been employed in experimental investigations of energy localization effects and hence are currently available for technological applications. In conclusion, the analytical framework introduced and the results obtained in this article are expected to contribute to a fundamental understanding of how the synergistic effects of nonlinear and stochastic phenomena could contribute to the development of novel methods for efficient vibration energy harvesting.

Numerical and Experimental Investigations of Energy Harvesting From Piezoelectric Inverted Flags

2021 ◽  
Author(s):  
Oluwafemi Ojo ◽  
Kourosh Shoele ◽  
Alper Erturk ◽  
Yu-Cheng Wang ◽  
Eetu Kohtanen
Keyword(s):  
Energy Harvesting ◽  
Experimental Investigations

scholarly journals Capacitive energy harvesting using soft dielectric elastomers: Design, testing and impedance matching optimization

AIP Advances ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 085310 ◽  
Author(s):  
Yongquan Wang ◽  
Liangquan Zhu ◽  
Gong Zhang ◽  
Lincheng Zhong ◽  
Hualing Chen
Keyword(s):  
Energy Harvesting ◽  
Impedance Matching ◽  
Dielectric Elastomers
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