Transition mechanism and dynamic behaviors of a multi-stable piezoelectric energy harvester with magnetic interaction

Yang, Jing; Li, Yin; Tan, Jiangping; Zhao, Zexiang; Wang, Guangqing

doi:10.1016/j.jsv.2021.116074

Cited by 37 publications

(6 citation statements)

References 31 publications

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“…Mei et al [33] researched the power characteristics of a traditional QH in rotating conditions. Ju et al [34] studied the impact of structural nonlinearity on the performance of a traditional QH. Zhou et al [35] presented a traditional PH featuring four external magnets and found that the system exhibits a relatively shallow potential well.…”

Section: Introductionmentioning

confidence: 99%

Design and performance of a novel magnetically induced penta-stable piezoelectric energy harvester

Sun,

Su,

Chen

et al. 2024

Smart Mater. Struct.

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The magnetically induced multi-stable piezoelectric vibration energy harvesters have garnered significant attention due to their strong nonlinear characteristics, wide operating bandwidths, and high electromechanical energy conversion efficiency. However, a traditional penta-stable design typically requires four rectangular external magnets. The excessive number of structural parameters amplify complexities in system optimization, dynamic analysis, and prototype installation, impeding harvester manufacturing and application. This study presents a novel penta-stable harvester design that utilizes interaction forces among a rectangular magnet and two annular magnets, resulting in a simplified system requiring only two external magnets. This design approach streamlines system design, dynamic analysis, and prototype installation, providing a fresh perspective on magnetic penta-stable vibration energy harvester design. The magnetizing current method is employed to accurately determine the system's magnetic field and magnetic force. Stability analysis indicates that the multi-stability of the harvester is influenced by both the vertical magnetic force and equivalent linear elastic force, which can be effectively controlled by adjusting the system's components. Dynamic simulations conducted under Gaussian white noise excitation confirm the penta-stable behavior of the system, and the dynamic responses verify that a shallower potential well depth contributes to the system's ability to attain a higher output voltage. Experimental validations closely align with simulation results, providing strong evidence for the accuracy of the study's findings. Furthermore, a practical application experiment demonstrates the harvester's capability to power a hygrothermograph, highlighting its potential for real-world energy harvesting applications.

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Section: Introductionmentioning

confidence: 99%

Design and performance of a novel magnetically induced penta-stable piezoelectric energy harvester

Sun,

Su,

Chen

et al. 2024

Smart Mater. Struct.

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“…Nonlinear designs using cantilever structure and magnetic interaction are good ways to extend the operational bandwidth because of their simple configurations and large oscillation amplitudes. Nonlinear piezoelectric energy harvesters that adopt cantilever structure and magnetic interaction consist of mono-stable piezoelectric energy harvesters (MPEHs) [30][31][32], bi-stable piezoelectric energy harvesters (BPEHs) [33][34][35][36][37][38], tri-stable piezoelectric energy harvesters (TPEHs) [39][40][41][42][43][44], quad-stable piezoelectric energy harvesters (QPEHs) [45][46][47][48][49], pentastable piezoelectric energy harvesters (PPEH) [50,51], etc.…”

Section: Introductionmentioning

confidence: 99%

Force and stability mechanism analysis of two types of nonlinear mono-stable and multi-stable piezoelectric energy harvesters using cantilever structure and magnetic interaction

Sun¹,

Leng²,

Hur³

et al. 2023

Smart Mater. Struct.

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Nonlinear mono-stable and multi-stable piezoelectric energy harvesters have attracted a lot of attention owing to their broadband frequency spectra and excellent energy harvesting performance. Herein, two types of nonlinear mono-stable, bi-stable, tri-stable, and quad-stable piezoelectric energy harvesters using cantilever structure and magnetic interaction are compared and analyzed. Based on the magnetizing current method, the magnetic force equations are obtained. Calculation results demonstrate that the stability of these harvesters is dependent on the equivalent linear elastic force and the vertical magnetic force. The equilibrium point occurs when the equivalent linear elastic force equals to the vertical magnetic force. The relationship between the number of stable equilibrium points ES and the number of the intersections of the two force curves NI is that ES = (NI+1)/2. Experiments are carried out to verify the equivalent linear elastic force, vertical magnetic force, and the number of stable equilibrium points of the fabricated prototypes. The experimental results are consistent with the calculated results, which verifies the correctness of the stability mechanism. Moreover, it is found that the stability mechanism is also applicable to the harvesters with more stable equilibrium points, such as penta-stable and hexa-stable harvesters. This work reveals the stability mechanism of nonlinear mono-stable and multi-stable energy harvesters using cantilever structure and magnetic interaction, and provides technical methods for the design of multi-stable energy harvesters.

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“…Accordingly, Wang et al (2020) proposed an equivalent magnetic 2-point dipole approach, which only counts the magnetizing current on the permanent magnet's left and right polarized surfaces and uses two total surface charges to represent a magnet. It has been proved that the accuracy of the equivalent magnetic 2-point dipole model was significantly improved by using the proposed method (Ju et al, 2021;Rezaei et al, 2021;Wang et al, 2020;Zhang et al, 2021). Currently, such approach is mainly used in the modeling of the magnetic force between thin cubic permanent magnets, the accuracy of the magnetic force model of the thick cylinder magnets based on such approach still needs to be examined.…”

Section: Introductionmentioning

confidence: 99%

Validation and optimization of two models for the magnetic restoring forces using a multi-stable piezoelectric energy harvester

Liu

Deng

et al. 2023

Journal of Intelligent Material Systems and Structures

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This article presents a tunable multi-stable piezoelectric energy harvester. The apparatus consists of a stationary magnet and a cantilever beam whose free end is attached by an assembly of two cylindrical magnets that can be moved along the beam and a small cylindrical magnet that is fixed at the beam tip. By varying two parameters, the system can assume three stability states: tri-stable, bi-stable, and mono-stable, respectively. The developed apparatus is used to validate two models for the magnetic restoring force: the equivalent magnetic point dipole approach and the equivalent magnetic 2-point dipole approach. The study focuses on comparing the accuracy of the two models for a wide range of the tuning parameters. The restoring forces of the apparatus are determined dynamically and compared with their analytical counterparts based on each of the models. To improve the model accuracy, a model optimization is carried out by using the multi-population genetic algorithm. With the optimum models, the parametric sensitivity of each of the models is investigated. The stability state region is generated by using the optimum second model.

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Transition mechanism and dynamic behaviors of a multi-stable piezoelectric energy harvester with magnetic interaction

Cited by 37 publications

References 31 publications

Design and performance of a novel magnetically induced penta-stable piezoelectric energy harvester

Design and performance of a novel magnetically induced penta-stable piezoelectric energy harvester

Force and stability mechanism analysis of two types of nonlinear mono-stable and multi-stable piezoelectric energy harvesters using cantilever structure and magnetic interaction

Validation and optimization of two models for the magnetic restoring forces using a multi-stable piezoelectric energy harvester

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