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Modelling and optimisation of a bimorph piezoelectric cantilever beam in an energy harvesting application

Thein, Chung Ket; Ooi, Beng Lee; Liu, Jing Sheng; Gilbert, James M.


Chung Ket Thein

Beng Lee Ooi

Jing Sheng Liu


Piezoelectric materials are excellent transducers in converting vibrational energy into electrical energy, and vibration-based piezoelectric generators are seen as an enabling technology for wireless sensor networks, especially in selfpowered devices. This paper proposes an alternative method for predicting the power output of a bimorph cantilever beam using a finite element method for both static and dynamic frequency analyses. Experiments are performed to validate the model and the simulation results. In addition, a novel approach is presented for optimising the structure of the bimorph cantilever beam, by which the power output is maximised and the structural volume is minimised simultaneously. Finally, the results of the optimised design are presented and compared with other designs.


Thein, C. K., Ooi, B. L., Liu, J. S., & Gilbert, J. M. (2016). Modelling and optimisation of a bimorph piezoelectric cantilever beam in an energy harvesting application. Journal of Engineering Science and Technology, 11(2), 212-227

Journal Article Type Article
Acceptance Date Feb 3, 2015
Publication Date 2016-02
Deposit Date May 26, 2015
Publicly Available Date Feb 29, 2016
Journal Journal of Engineering Science and Technology
Print ISSN 1823-4690
Peer Reviewed Peer Reviewed
Volume 11
Issue 2
Pages 212-227
Keywords Piezoelectric; Multi-disciplinary optimisation; Shape optimisation; Energy harvesting; Bimorph cantilever beam
Public URL
Publisher URL
Additional Information Copy of article first published in: Journal of engineering science & technology , 2016, v.11, issue 2


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