Rotational energy harvesting for self-powered sensing

https://pure.hw.ac.uk/ws/files/34728103/ECM_2020_hybrid_VIV_gallop.pdf

Hybrid wind energy scavenging by coupling vortex-induced vibrations and galloping

A hybrid piezo-dielectric wind energy harvester for high-performance vortex-induced vibration energy harvesting

Multistability phenomenon in signal processing, energy harvesting, composite structures, and metamaterials: A review

A nonlinear two-degree-of-freedom electromagnetic energy harvester for ultra-low frequency vibrations and human body motions

Vibrational interference has been found to incur inefficient system responses and suboptimal energy harvesting performance as the rotational frequency increases in the conventional rotational plucking energy harvester. As a result, this letter proposes a music-box-like structure of a rotational plucking energy harvester to overcome the problem by extending the rotary cylinder out of plane. A model is proposed and experimentally validated by characterizing its dynamic and energetic characteristics. Numerical analyses show that the proposed rotational plucking structure can reduce the vibrational interference and be capable of harvesting more energy at high rotational frequencies as well as extending the operating frequency range and broadening the half-power bandwidth.

A music-box-like extended rotational plucking energy harvester with multiple piezoelectric cantilevers

Asymmetric plucking bistable energy harvester: Modeling and experimental validation

Modeling and experimental validation on the interference of mechanical plucking energy harvesting

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.

Xinlei Fu

Papers

A music-box-like extended rotational plucking energy harvester with multiple piezoelectric cantilevers

Asymmetric plucking bistable energy harvester: Modeling and experimental validation

Modeling and experimental validation on the interference of mechanical plucking energy harvesting

Modeling and Analysis of Piezoelectric Energy Harvesting With Dynamic Plucking Mechanism

Nondimensional model and parametric studies of impact piezoelectric energy harvesting with dissipation