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

Dawei Man (), Bangdong Jiang, Yu Zhang, Liping Tang, Qinghu Xu, Dong Chen and Tingting Han
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Dawei Man: School of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China
Bangdong Jiang: School of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China
Yu Zhang: School of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China
Liping Tang: School of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China
Qinghu Xu: School of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China
Dong Chen: School of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China
Tingting Han: School of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China

Energies, 2024, vol. 17, issue 9, 1-15

Abstract: 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.

Keywords: piezoelectric energy harvester; rotational motion; asymmetric potential well; inter-well periodic motion; nonlinear dynamic response (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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