Pan, Diankun, Yu, Zixin, Qi, Zhuoyuan and Wu, Zhangming  ORCID: https://orcid.org/0000-0001-7100-3282
2027.
A cantilevered bistable piezoelectric harvester array for broadband vibration.
European Journal of Mechanics - A/Solids
122
(P1)
, 106405.
10.1016/j.euromechsol.2026.106405
|
Preview |
PDF
- Accepted Post-Print Version
Available under License Creative Commons Attribution. Download (2MB) | Preview |
Abstract
This paper presents a novel magnet-free nonlinear vibrational energy harvester array to broaden the operational bandwidth and improve power distribution across the bandwidth. This array consists of cantilevered bistable piezoelectric harvesters (CBPHs) with adjacent and interlaced bandwidths, each of which is capable of operating independently. Based on the nonlinear characteristics of the static mechanical properties of CBPHs, a lumped-parameter analytical model, which is characterized by a nonlinear spring connected in series with a linear spring, is developed to predict the dynamic responses. To lay the investigation foundation for array design, comprehensive dynamic analyses are performed on a representative CBPH, using experimental testing, finite element analysis, and the analytical model. Results show that the CBPH with weak bistability, characterized by a single load-displacement path, is more likely to exhibit a hardening-type nonlinear response with high output under a relatively low excitation level, which is desirable for broadband energy harvesting. Furthermore, a parametric analysis is conducted to establish the relationship between design parameters and mechanical properties, which can serve as a guideline for designing CBPHs. Guided by these insights, an array integrating five CBPHs is designed and fabricated. Under an acceleration level of 0.5 g, all CBPHs in this array exhibit broadband hardening-type responses, achieving an operational bandwidth of 18 Hz and a relatively uniformly distributed output power across this bandwidth with an average value of 0.65 mW. This performance outperforms that of the linear counterpart. Additionally, random vibration tests validate the array's adaptability across varying environmental vibrations, demonstrating its potential performance in practical applications.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Engineering |
| Additional Information: | RRS policy applied |
| Publisher: | Elsevier BV |
| ISSN: | 0997-7538 |
| Date of First Compliant Deposit: | 29 September 2026 |
| Date of Acceptance: | 21 September 2026 |
| Last Modified: | 29 Sep 2026 09:30 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/189845 |
Actions (repository staff only)
 |
Edit Item |
Dimensions
Dimensions