Dynamic modeling and analysis of a bistable piezoelectric cantilever power generation system

Sun, Shurong; Cao, Shuqian

doi:10.7498/aps.61.210505

Cited by 23 publications

(13 citation statements)

References 12 publications

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“…The instantaneous short circuit current flowing across the electrodes is simply the time derivative of the total free charge and can be given by (Sun and Cao, 2012)…”

Section: The Nonlinear Cd-peh Modelmentioning

confidence: 99%

Modeling and performance analysis of a curve-shaped based doubly clamped piezoelectric energy harvester (CD-PEH)

Chen

Zhang

Guo

et al. 2023

Journal of Intelligent Material Systems and Structures

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In this paper, a curve-shaped based doubly clamped piezoelectric energy harvester (CD-PEH) is explored for improving the energy harvesting performance. The harvester consists of a composed beam constructed with two arc-shaped structures and a flat beam, as well as two proof masses. A method based on chained beam constraint model theory (CBCM) is first applied to build the nonlinear restoring force model of the CD-PEH, the developed analytical model is validated by the finite element analysis (FEA). Then the electromechanically coupled model for the CD-PEH is built to investigate the effect of excitation amplitudes, geometric parameters and load resistance on the output characteristics. Due to the geometric nonlinearity caused by the arc-shaped configuration, the CD-PEH orderly exhibits quasi-linear, softening nonlinear and mixed hardening & softening nonlinearity behavior with the increasing of excitation level, which could effectively extend the frequency bandwidth of the system. For the excitation of A = 8 m/s2, the effective working bandwidth of the CD-PEH is increased by 633% compared with the effective bandwidth in the case of A = 2 m/s2. Moreover, comparison experiments demonstrate that the output voltage and the effective bandwidth are increased by 225 and 450%, respectively, compared with the typical doubly-clamped piezoelectric energy harvester (T-PEH) under the same excitation amplitude. Overall, this study provides a new way and theoretical framework for the design of high-efficiency doubly clamped piezoelectric energy harvester.

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“…The instantaneous short circuit current flowing across the electrodes is simply the time derivative of the total free charge and can be given by (Sun and Cao, 2012)…”

Section: The Nonlinear Cd-peh Modelmentioning

confidence: 99%

Modeling and performance analysis of a curve-shaped based doubly clamped piezoelectric energy harvester (CD-PEH)

Chen

Zhang

Guo

et al. 2023

Journal of Intelligent Material Systems and Structures

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“…The most promising one is to incorporate magnets into the linear PEH to generate a nonlinear PEH. [9,12,24,25,29]…”

Section: Linear Pehmentioning

confidence: 99%

“…Harvesting energy from ambient mechanical vibrations has been considered as a promising solution to this issue. [9][10][11][12][13] The ultimate aim is to implement self-powered systems. [11] Mechanical vibration can be converted into electrical energy as a power supply via electrostatic, [14] electromagnetic, [15] or piezoelectric transductions.…”

Section: Introductionmentioning

confidence: 99%

“…The dynamic responses of nonlinear PEHs with different magnet separation under various excitation levels have also be analytically modeled and experimentally validated by some researchers. [12,30,31] Audò et al [32] designed an antiphase bistable PEH that is realized by introducing the repulsive magnetic force between two parallel-aligned cantilever beams. Audò et al [33] also presented a two-dimensional PEH by establishing magnetic coupling between two beams vibrating in the orthogonal directions.…”

Section: Introductionmentioning

confidence: 99%

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Broadband energy harvesting via magnetic coupling between two movable magnets

Fan¹,

Xu²,

Wang³

et al. 2014

Chinese Phys. B

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Harvesting energy from ambient mechanical vibrations by the piezoelectric effect has been proposed for powering microelectromechanical systems and replacing batteries that have a finite life span. A conventional piezoelectric energy harvester (PEH) is usually designed as a linear resonator, and suffers from a narrow operating bandwidth. To achieve broadband energy harvesting, in this paper we introduce a concept and describe the realization of a novel nonlinear PEH. The proposed PEH consists of a primary piezoelectric cantilever beam coupled to an auxiliary piezoelectric cantilever beam through two movable magnets. For predicting the nonlinear response from the proposed PEH, lumped parameter models are established for the two beams. Both simulation and experiment reveal that for the primary beam, the introduction of magnetic coupling can expand the operating bandwidth as well as improve the output voltage. For the auxiliary beam, the magnitude of the output voltage is slightly reduced, but additional output is observed at off-resonance frequencies. Therefore, broadband energy harvesting can be obtained from both the primary beam and the auxiliary beam.

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“…To tackle this issue, many research efforts have been devoted to harvesting energy from the ambient environment to power and maintain these low-power devices. [9][10][11][12][13] Such energy transducers are termed microenergy harvesters or micropower generators. [14][15][16] Currently, the harvestable environmental sources mainly include solar power, thermal gradients, and mechanical vibration.…”

Section: Introductionmentioning

confidence: 99%

The dynamic characteristics of harvesting energy from mechanical vibration via piezoelectric conversion

Fan¹,

Ming²,

Xu³

et al. 2013

Chinese Phys. B

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As an alternative power solution for low-power devices, harvesting energy from the ambient mechanical vibration has received increasing research interest in recent years. In this paper we study the transient dynamic characteristics of a piezoelectric energy harvesting system including a piezoelectric energy harvester, a bridge rectifier, and a storage capacitor. To accomplish this, this energy harvesting system is modeled, and the charging process of the storage capacitor is investigated by employing the in-phase assumption. The results indicate that the charging voltage across the storage capacitor and the gathered power increase gradually as the charging process proceeds, whereas the charging rate slows down over time as the charging voltage approaches to the peak value of the piezoelectric voltage across the piezoelectric materials. In addition, due to the added electrical damping and the change of the system natural frequency when the charging process is initiated, a sudden drop in the vibration amplitude is observed, which in turn affects the charging rate. However, the vibration amplitude begins to increase as the charging process continues, which is caused by the decrease in the electrical damping (i.e., the decrease in the energy removed from the mechanical vibration). This electromechanical coupling characteristic is also revealed by the variation of the vibration amplitude with the charging voltage.

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Dynamic modeling and analysis of a bistable piezoelectric cantilever power generation system

Cited by 23 publications

References 12 publications

Modeling and performance analysis of a curve-shaped based doubly clamped piezoelectric energy harvester (CD-PEH)

Modeling and performance analysis of a curve-shaped based doubly clamped piezoelectric energy harvester (CD-PEH)

Broadband energy harvesting via magnetic coupling between two movable magnets

The dynamic characteristics of harvesting energy from mechanical vibration via piezoelectric conversion

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