Design and Analysis of a Nonlinear Micro Piezoelectric-electrostatic Energy Generator

SAM Lajimi (University of Waterloo, Canada) & MI Friswell (Swansea University)

Nonlinear Dynamics, Vol. 100, No. 4, June 2020, pp. 3029-3042

Abstract

A nonlinear micro piezoelectric-electrostatic energy harvester is designed and studied using mathematical and computational methods. The system consists of a cantilever beam substrate, a bimorph piezoelectric transducer, a pair of tuning parallel-plate capacitors, and a tip-mass. The governing nonlinear mathematical model of the electro-mechanical system including nonlinear material and quadratic air-damping is derived for the series connection of the piezoelectric layers. The static and modal frequency curves are computed to optimize the operating point, and a parametric study is performed using numerical methods. A bias DC voltage is used to adapt the system to resonate with respect to the frequency of external vibration. Furthermore, to improve the bandwidth and performance of the harvester (and achieve a high level of harvested power without sacrificing the bandwidth) a nonlinear feedback loop is integrated into the design.

Paper Availability

This material has been published in Nonlinear Dynamics, Vol. 100, No. 4, June 2020, pp. 3029-3042, the only definitive repository of the content that has been certified and accepted after peer review. Copyright and all rights therein are retained by Springer.


Link to paper using doi: 10.1007/s11071-020-05690-8

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