On a nonlinear broadband piezoelectric energy harvester with a coupled beam array

Shim, Hyo-Kyung; Sun, Shuailing; Kim, Hyunsoo; Lee, Dong Gyu; Lee, Yeon-Jeong; Jang, Ji‐Soo; Cho, Kyung Hoon; Baik, Jeong Min; Kang, Chong‐Yun; Leng, Yonggang; Hur, Sunghoon; Song, Hyunwoo

doi:10.1016/j.apenergy.2022.120129

Cited by 29 publications

(10 citation statements)

References 40 publications

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“…They are scaled down microfabricated electro-mechanical structures. Flexural-mode beams of micro length are crucial MEMS components used in electrical filtering, communications, energy harvesting, sensing applications, etc., as observed in the works of Wang et al [1], Nguyen [2], and Pourkamali and Ayazi [3], Shim et al [4], among others. Different kinds of techniques of dissipation such as surface loss damping, support loss damping, squeeze film damping, TED, air damping, anchor loss, etc., were discussed by Yasumura et al [5], Yang et al [6], and Hao et al [7], Alcheikh et al [8], Bao and Yang [9], Chu [10], Alcheikh et al [11], among others, as low energy dissipation is a quintessential trait.…”

Section: Introductionsupporting

confidence: 55%

Thermoelastic damping and frequency shift of different micro-scale piezoelectro-magneto-thermoelastic beams

Guha,

Singh,

Singh

2023

Phys. Scr.

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This work focuses on mathematically studying thermoelastic damping (TED) and frequency shift (FS) in micro-scale piezoelectro-magneto-thermoelastic (PEMT) composite beams composed of BaTiO3-CoFe2O4 combination. Pertaining to cutting-edge micro-technologies implemented in several engineering/scientific applications now-a-days, micro-scale doubly clamped (CC), doubly simply supported (SS), clamped-free (CF), and clamped-simply supported (CS) beams are extensively analyzed. The beams are modeled following the linear Euler–Bernoulli assumptions. The first two eigenvalues of all beams are numerically obtained using Newton-Raphson method. The closed-form expressions of TED and FS of all beams are derived analytically. The influences of Classical dynamical coupled (CL), Lord-Shulman (LS) & Green-Lindsay (GL) thermoelasticity theories, beam dimensions, BaTiO3 volume fraction (Ωf), and the first two modes M1 & M2) on the TED & FS are meticulously analyzed. Critical thickness (CrTh), critical length (CrLt), and TED (inverse Quality factor) of the beams are numerically obtained and studied. Among other key outcomes, the existence of a critical value of Ωf is established in the range Ωf∈ [ [0.5, 0.55], at which, the TED and FS display a drastic change in their natures. The outcomes of the present analysis may find immense potential uses in the design and development of PEMT composite micro-beams, and their applications in several areas such as supporting/stiffening other micro/nanostructures, construction works, sensitive sensing applications, etc.

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Section: Introductionsupporting

confidence: 55%

Thermoelastic damping and frequency shift of different micro-scale piezoelectro-magneto-thermoelastic beams

Guha,

Singh,

Singh

2023

Phys. Scr.

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“…If γ is a positive number, the system will be unstable; in cases where γ > 0 is set, then the tuned frequency of the unstable region can be determined from Equation (29), and the inequality can be expressed as the following equations:…”

Section: System Frequency Is Defined Asmentioning

confidence: 99%

Enhancing Electrical Generation Efficiency through Parametrical Excitation and Slapping Force in Nonlinear Elastic Beams for Vibration Energy Harvesting

Wang,

Kuo

2023

Sensors

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This study aims to enhance conventional vibration energy harvesting systems (VEHs) by repositioning the piezoelectric patch (PZT) in the middle of a fixed–fixed elastic steel sheet instead of the root, as is commonly the case. The system is subjected to an axial simple harmonic force at one end to induce transversal vibration and deformation. To further improve power conversion, a baffle is strategically installed at the point of maximum deflection, introducing a slapping force to augment electrical energy harvesting. Employing the theory of nonlinear beams, the equation of motion for this nonlinear elastic beam is derived, and the method of multiple scales (MOMS) is used to analyze the phenomenon of parametric excitation. This study demonstrates through experiments and theoretical analysis that the second mode yields better power generation benefits than the first mode. Additionally, the voltage generation benefits of the enhanced system with the added baffle (slapping force) surpass those of traditional VEH systems. Overall, the proposed model proves feasible and holds promising potential for efficient vibration energy harvesting applications in various industrial sectors.

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“…One of the most promising methods investigated for the purpose of enlarging the PEHs' bandwidth is the introduction of a non-linearity in the oscillating structure [13][14][15], such as bistability [16]. Bistability is a type of non-linearity that implies the existence of two stable equilibrium positions in a given system.…”

Section: Introductionmentioning

confidence: 99%

Predictive lumped model for a tunable bistable piezoelectric energy harvester architecture

Benhemou,

Gibus,

Huguet

et al. 2024

Smart Mater. Struct.

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In this article, we propose the modelling of a tunable Bistable Piezoelectric Energy Harvester (or BPEH) architecture. The former is a type of ambient energy converters that continue to gain attention due to their wideband frequency response. As the non-linear dynamics of BPEHs imply significant modeling complexity, dynamic lumped models are necessary to predict BPEHs’ dynamic response and should fit the type of architecture studied. The BPEH architecture of interest uses post-buckled beams to create bistability and an Amplified Piezoelectric Actuator (or APA) to convert the ambient vibrations. To date, no dynamic lumped models have been found in existing literature that account for both the electromechanical conversion and the dynamic behavior of buckled beams, with a specific focus on their axial and bending stiffness, for this BPEH architecture. Additionally, the proposed BPEH architecture offers buckling level tunability, which is achieved using an additional APA. Hence, the aim of this paper is to propose a new lumped model for a BPEH architecture which considers the effect of the post-buckled beams’ stiffnesses and of the additional APA through an elasticity factor κ ̅, called elasticity factor. This lumped model is established using Euler Lagrange equations and is experimentally validated on a tunable BPEH prototype. This validation shows an average relative error below 6% between the model’s predictions and experimental dynamic response of the prototype to an ascending frequency sweep, compared to an average relative error that’s below 15% for the model proposed in literature. Numerical simulations using the proposed model were made and lead to the conclusion that there is an optimal elasticity factor κ ̅ that ensures the maximum power output while maintaining the frequency bandwidth.

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On a nonlinear broadband piezoelectric energy harvester with a coupled beam array

Cited by 29 publications

References 40 publications

Thermoelastic damping and frequency shift of different micro-scale piezoelectro-magneto-thermoelastic beams

Thermoelastic damping and frequency shift of different micro-scale piezoelectro-magneto-thermoelastic beams

Enhancing Electrical Generation Efficiency through Parametrical Excitation and Slapping Force in Nonlinear Elastic Beams for Vibration Energy Harvesting

Predictive lumped model for a tunable bistable piezoelectric energy harvester architecture

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