Experimental Analysis of a Piezoelectric Energy Harvester with Internal Resonances

  • Paulo S. Varoto
Conference paper
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)


A crucial issue in the design process of a piezoelectric harvester is to properly tune the device to the imposed disturbance such that the mechanical to electrical energy conversion can be enhanced. Inclusion of intentional nonlinear restoring effects has been widely exploited to meet optimal performance of the device under study. The main goal of this article is to address the issue of modal interaction on a two degrees of freedom piezoelectric energy harvester presenting commensurate natural frequencies. An experimental analysis is performed on an L-shaped metallic prototype containing lumped masses attached in specific positions such that commensurate natural frequencies in the 2:1 ratio are obtained. Preliminary experimental results indicated that under appropriate excitation condition energy could flow between the corresponding modes of vibration thus enabling additional energy generation on both commensurate frequencies.


Nonlinear energy harvesting Nonlinear vibrations Internal resonances L-shape beam 


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Copyright information

© The Society for Experimental Mechanics, Inc. 2017

Authors and Affiliations

  1. 1.Mechanical Engineering DepartmentUniversity of São PauloCarlosBrazil

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