Improving energy harvesting from impulsive excitations by a nonlinear tunable bistable energy harvester

Huang, Xingbao; Yang, Bintang

doi:10.1016/j.ymssp.2021.107797

Cited by 36 publications

(13 citation statements)

References 40 publications

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“…In order to broaden frequency bandwidth, structural nonlinearity is usually introduced into energy harvesting systems. Among different nonlinear mechanisms, bistable mechanism, also called snap-through mechanism, has been widely exploited in the fields of vibration energy harvesting, especially in piezoelectric energy harvesting [30][31][32] and electromagnetic energy harvesting [33][34][35]. However, the bistable mechanism is not very common in triboelectric energy harvesting.…”

Section: Bistable Mechanism For Efficiency Enhancementmentioning

confidence: 99%

Theoretical investigation and experiment of a disc-shaped triboelectric energy harvester with a magnetic bistable mechanism

Zhao

Ouyang

2021

Smart Mater. Struct.

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Triboelectric energy harvesting has emerged as a promising route to scavenge ambient mechanical energy for cost-effective, clean and sustainable electricity. Disc-shaped triboelectric energy harvesters are suitable for two kinds of mechanical energy sources: continuous rotation and vibration. A majority of current studies about disc-shaped triboelectric energy harvesters focus on scavenging energy in continuous rotation, but there is a lack of investigations on angular vibration, especially in structural dynamics. In this work, a new disc-shaped triboelectric energy harvester with a bistable mechanism enabled by two repulsive magnets is developed for harvesting vibration energy. There are two discs in the harvester, one stationary and the other undergoing angular oscillation. Both have segmented triboelectric films on their contact surfaces. The magnetic bistable mechanism is utilized for the first time in a disc-shaped triboelectric energy harvester for efficiency enhancement. A comprehensive theoretical model coupling both structural dynamic and electric dynamic domains is established. A comparison between the coupled and uncoupled models reveals that the ET between electrodes can be ignored. Numerical simulations are carried out to investigate the effect of the potential wells due to the two magnets, basins of attractors and the influence of damping from the perspective of structural dynamics. A prototype is fabricated for experimental investigations, which demonstrate that the harvester with the bistable mechanism can achieve a better performance than the corresponding harvester without the bistable mechanism, and the output voltage of the harvester increases with the increase of excitation amplitude. Theoretical and experimental comparisons about the electric outputs between the triboelectric films with different segmentation structures reveal that increasing the number of sectors on the films effectively improves the harvesting efficiency. This work establishes a link between the structural dynamics and electric dynamics for the vibration-based disc-shaped triboelectric energy harvester, providing guidelines for its design and fabrication.

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Section: Bistable Mechanism For Efficiency Enhancementmentioning

confidence: 99%

Theoretical investigation and experiment of a disc-shaped triboelectric energy harvester with a magnetic bistable mechanism

Zhao

Ouyang

2021

Smart Mater. Struct.

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“…[237][238][239] The buckling beam/plate can be excited to make the snap-through motion between two stable equilibrium states with its intrinsic mechanical structure, which significantly reduces the volume and quality of the device and improves the power density of the energy harvesting system. [240][241][242] In Figure 10I, a nonlinear vibration energy harvester consists of two precurved slender buckling beams with a proof mass and four piezoelectric cantilever beams in the center of the bridge. [243] When the system is subjected to low-frequency vibration higher than the threshold acceleration value, the buckling beams snap through between two equilibrium states, providing high acceleration for the piezoelectric cantilever beam in the center of the bridge to make them resonate at a high frequency.…”

Section: Construction Of Potential Energy Fieldmentioning

confidence: 99%

Mechanical Intelligent Energy Harvesting: From Methodology to Applications

Zhao

Zou

Wei

et al. 2023

Advanced Energy Materials

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The Artificial Intelligence of Things (AIoT) connects everything with intelligence, while the increase in energy consumption generated by numerous electronic devices puts forward an impending demand on the power supply. Energy harvesting technology has emerged as a compelling innovation technology for the net zero emissions of the power supply for the AIoT. Although significant advances have been witnessed in energy harvesting, some issues such as poor electrical output, weak environmental adaptability, and low reliability are difficult to satisfactorily resolve. Mechanical intelligent energy harvesting can be defined as the system identifying the external excitation or its own state and reacting to it, rather than relying on electrical sensing elements or a central controller for certain adaptive or programmed functions. The adaptive and programmed functions exhibit great potential in solving the above‐mentioned issues that seriously restrict the development of the energy harvesting technology. Here, a generalized definition of mechanical intelligent energy harvesting is given critically and the design methodology is elaborated. The typical reported energy harvesting systems with the characteristics of mechanical intelligence are reviewed. The key research directions in mechanical intelligent energy harvesting are discussed. The mechanical intelligence is expected to revolutionize the development of the energy‐harvesting technology and pave the way for applications.

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“…Chiacchiari et al (2017, 2019) investigated the potential benefit of the bi-stable element coupled to a directly excited primary system for converting broadband and low-amplitude vibration energy such as single and repeated impulses into available energy, and explored snap-through regimes, namely periodic cross-well, aperiodic (chaotic) cross-well, and intra-well oscillations. Huang and Yang (2021a, 2021b) studied and evaluated the energy conversion performances and energy trapping capacity of a tri-stable DVA under impulsive excitations and harmonic vibrations in comparison with their counterparts of a bi-stable DVA, and proposed a tunable bi-stable energy harvester to scavenge the undesired vibration energy and simultaneously convert it into available energy. Nguyen et al (2019) developed detailed models for both mono-stable and bi-stable magnetic spring-based vibration energy harvester configurations, where the bi-stability is caused by introducing a cluster of peripheral solid magnets.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the tunable bi-stable clustered energy conversion inspired dynamic vibration absorbers: A theoretical study

Huang

Zhang

Yang

2023

Journal of Vibration and Control

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This paper introduces an energy conversion inspired vibration control methodology and presents a representative prototype of tunable bi-stable energy converters. This work is concerned on improving energy conversion and absorption performance of tunable bi-stable clustered energy conversion inspired dynamic vibration absorbers (EC-DVAs). The deterministic parametric analysis of the energy transfer performance of clustered EC-DVAs is conducted. The nonlinear energy capture behaviors including transient energy transfer and snap-through motions are studied. It can be uniformly understood that the excellent energy transfer and conversion efficiency can be achieved by modulating the length ratio from 0.6 to 0.8. It is found that clustered EC-DVAs with four uniform cells and constant length ratio σ = 0.8 can obtain significant energy conversion and targeted energy transfer performance without requiring tedious active regulation when the system is subjected to wide-amplitude impulsive scenarios. Therefore, the proposed tunable bi-stable system composed of clustered EC-DVAs with state-of-the-art adaptive control strategies is a potential alternative for energy reuse and vibration suppression of mechanical components exposed to kaleidoscopic impulses.

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Improving energy harvesting from impulsive excitations by a nonlinear tunable bistable energy harvester

Cited by 36 publications

References 40 publications

Theoretical investigation and experiment of a disc-shaped triboelectric energy harvester with a magnetic bistable mechanism

Theoretical investigation and experiment of a disc-shaped triboelectric energy harvester with a magnetic bistable mechanism

Mechanical Intelligent Energy Harvesting: From Methodology to Applications

Investigation on the tunable bi-stable clustered energy conversion inspired dynamic vibration absorbers: A theoretical study

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