Journal ArticleDOI
Modeling and Analysis of Piezoelectric Energy Harvesting With Dynamic Plucking Mechanism
Xinlei Fu,Wei-Hsin Liao +1 more
TLDR
In this paper, the authors investigated the dynamic plucking mechanism and developed a comprehensive model of plucking piezoelectric energy harvesting by considering the Hertzian contact theory.Abstract:
Nonharmonic excitations are widely distributed in the environment. They can work as energy sources of vibration energy harvesters for powering wireless electronics. To overcome the narrow bandwidth of linear vibration energy harvesters, plucking piezoelectric energy harvesters have been designed. Plucking piezoelectric energy harvesters can convert sporadic motions into plucking force to excite vibration energy harvesters and achieve broadband performances. Though different kinds of plucking piezoelectric energy harvesters have been designed, the plucking mechanism is not well understood. The simplified models of plucking piezoelectric energy harvesting neglect the dynamic interaction between the plectrum and the piezoelectric beam. This research work is aimed at investigating the plucking mechanism and developing a comprehensive model of plucking piezoelectric energy harvesting. In this paper, the dynamic plucking mechanism is investigated and the Hertzian contact theory is applied. The developed model of plucking piezoelectric energy harvesting accounts for the dynamic interaction between the plectrum and the piezoelectric beam by considering contact theory. Experimental results show that the developed model well predicts the responses of plucking piezoelectric energy harvesters under different plucking velocities and overlap lengths. Parametric studies are conducted on the dimensionless model after choosing appropriate scaling. The influences of plucking velocity and overlap length on energy harvesting performance and energy conversion efficiency are discussed. The comprehensive model helps investigate the characteristics and guide the design of plucking piezoelectric energy harvesters.read more
Citations
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Journal ArticleDOI
A music-box-like extended rotational plucking energy harvester with multiple piezoelectric cantilevers
TL;DR: In this article, a rotational plucking energy harvester with a music box-like structure was proposed to overcome the problem of vibrational interference by extending the rotary cylinder out of plane.
Journal ArticleDOI
Analytical and experimental investigation of the centrifugal softening and stiffening effects in rotational energy harvesting
TL;DR: In this paper, the authors presented a comprehensive comparison of the centrifugal softening and stiffening harvesters with a unified dimensionless analytical model, where the analytical expressions of the optimum shortcircuit and open-circuit rotational frequencies, the optimum resistances and the optimum centrifugal coefficients were derived to reveal the influence mechanism of the gravity effect on the energy harvesting performance.
Journal ArticleDOI
Comprehensive theoretical and experimental investigation of the rotational impact energy harvester with the centrifugal softening effect
Shitong Fang,Shitong Fang,Suo Wang,Gang Miao,Shengxi Zhou,Zhichun Yang,Xutao Mei,Wei-Hsin Liao +7 more
TL;DR: In this paper, a rotational impact energy harvester using the centrifugal softening effect is presented. But the authors do not consider the effect of the impact stiffness on the impact force and energy output.
Journal ArticleDOI
Design and analysis of a broadband three-beam impact piezoelectric energy harvester for low-frequency rotational motion
TL;DR: In this article, a three-beam impact energy harvester (TIEH) was proposed to enhance the energy harvesting efficiency for low-frequency rotational motion, which includes three beams, including the excitation beam, the harvesting beam and the protection beam.
Journal ArticleDOI
Modeling and experimental validation on the interference of mechanical plucking energy harvesting
TL;DR: In this article, a comprehensive model that is able to describe the dynamic plucking force associated with the vibrational interference is derived based on Hamilton's principle and Hertzian contact theory.
References
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Book
Theory of elasticity
TL;DR: The theory of the slipline field is used in this article to solve the problem of stable and non-stressed problems in plane strains in a plane-strain scenario.
Journal ArticleDOI
Energy harvesting vibration sources for microsystems applications
TL;DR: A comprehensive review of existing piezoelectric generators is presented in this paper, including impact coupled, resonant and human-based devices, including large scale discrete devices and wafer-scale integrated versions.
Journal ArticleDOI
A review of the recent research on vibration energy harvesting via bistable systems
Ryan L. Harne,Kon-Well Wang +1 more
TL;DR: A review of the major efforts and findings documented in the literature can be found in this article, where a common analytical framework for bistable electromechanical dynamics is presented, the principal results are provided, the wide variety of bistably energy harvesters are described, and some remaining challenges and proposed solutions are summarized.
Journal ArticleDOI
Modelling of Piezoelectric Actuator Dynamics for Active Structural Control
TL;DR: In this article, the effects of dynamic coupling between a structure and an electrical network through the piezoelectric effect are derived. But the authors focus on the case of a cantilevered beam with surface mounted piezoceramics and indirect voltage and current drive.
Journal ArticleDOI
On the Role of Nonlinearities in Vibratory Energy Harvesting: A Critical Review and Discussion
TL;DR: In this article, the authors highlight the role of nonlinearities in the transduction of energy harvesters under different types of excitations and investigate the conditions, in terms of excitation nature and potential shape, under which such non-linearities can be beneficial for energy harvesting.
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