Improving energy harvesting from low-frequency excitations by a hybrid tri-stable piezoelectric energy harvester

Man, Dawei; Xu, Gaozheng; Kuang, Xingchen; Xu, Huaiming; Tang, Liping

doi:10.1016/j.aej.2023.06.031

Cited by 8 publications

(1 citation statement)

References 26 publications

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“…The intrinsic frequency of the undamped vibration of the beam is ω r = λ 2 r YI/(m 0 l 4 ), and λ r is the eigenvalue. λ r and the mode function are calculated as described in the literature [36].…”

Section: Modeling Of the Asymmetric Rhtpehmentioning

confidence: 99%

A Hybrid Tri-Stable Piezoelectric Energy Harvester with Asymmetric Potential Wells for Rotational Motion Energy Harvesting Enhancement

Man,

Jiang,

Zhang

et al. 2024

Energies

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This paper proposes an asymmetric hybrid tri-stable piezoelectric energy harvester for rotational motion (RHTPEH). The device features an asymmetric tri-stable piezoelectric cantilever beam positioned at the edge of a rotating disk. This beam is uniquely configured with an asymmetric arrangement of magnets. Additionally, an elastic amplifier composed of a vertical and a rotating spring connects the beam’s fixed end and the disk. This setup enhances both the rotational amplitude and vertical displacement of the beam during motion. A comprehensive dynamical model of the RHTPEH was developed using Lagrange’s equations. This model facilitated an in-depth analysis of the system’s behavior under various conditions, focusing on the influence of key parameters such as the asymmetry in the potential well, the stiffness ratio of the amplifier springs, the radius of the disk, and the disk’s rotational speed on the nonlinear dynamic response of the system. The results show that the asymmetric hybrid tri-stable piezoelectric energy harvester makes it easier to harvest the vibration energy in rotational motion and has excellent power output performance compared with the symmetric tri-stable piezoelectric energy harvester. The output power magnitude of the system at higher rotational speeds increases as the radius of rotation expands, but when the rotational speed is low, the steady-state output power magnitude of the system is not sensitive to changes in the radius of rotation. Theoretical analysis and numerical simulations validate the effectiveness of the proposed asymmetric RHTPEH for energy harvesting in low-frequency rotating environments.

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Section: Modeling Of the Asymmetric Rhtpehmentioning

confidence: 99%

A Hybrid Tri-Stable Piezoelectric Energy Harvester with Asymmetric Potential Wells for Rotational Motion Energy Harvesting Enhancement

Man,

Jiang,

Zhang

et al. 2024

Energies

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Improving Energy Harvesting from Cantilever-like Structures Based on Beam Geometry

Kurt,

Orhan

2024

J. Vib. Eng. Technol.

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Purpose Power gain from piezoelectric harvesters depends on several parameters and one of them is to design the substructure as to increase the mechanical strain occurred in the piezoelectric material. In this study, the effect of geometrical modification of the beam on the harvested power was investigated and new geometries were offered for increased power response from cantilever type energy harvesters. Method First, the effectiveness of auxetic structures on harvested power was investigated to see the effect of the negative Poisson’s ratio on harvested power. These structures are very popular in recent years on energy harvesting applications; however, their performances were generally compared to plain structures which is not a fair comparison. Rather, in this study, their performances were compared to non-auxetic nonlinear structures as well as plain geometry. Then, three new shapes inspired by re-entrant auxetic structure were presented for increased power response, and harvested power from these structures were evaluated under different conditions. Results It was shown that the power gain from auxetic structures is very high compared to plain structures; however, this increase in power could also be achieved using a non-auxetic simple rectangular structure in some cases. On the other hand, new geometries offered in this study performed better than the auxetic and non-auxetic geometries in most cases.

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Enhanced energy harvesting from random excitations: A dynamic amplifier-augmented hybrid bistable piezoelectric energy harvester

Man,

Bai,

Tang

et al. 2024

Alexandria Engineering Journal

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Improving energy harvesting from low-frequency excitations by a hybrid tri-stable piezoelectric energy harvester

Cited by 8 publications

References 26 publications

A Hybrid Tri-Stable Piezoelectric Energy Harvester with Asymmetric Potential Wells for Rotational Motion Energy Harvesting Enhancement

A Hybrid Tri-Stable Piezoelectric Energy Harvester with Asymmetric Potential Wells for Rotational Motion Energy Harvesting Enhancement

Improving Energy Harvesting from Cantilever-like Structures Based on Beam Geometry

Enhanced energy harvesting from random excitations: A dynamic amplifier-augmented hybrid bistable piezoelectric energy harvester

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