Modeling of a Bridge-Shaped Nonlinear Piezoelectric Energy Harvester

被引：10

作者：

Gafforelli, Giacomo ^{[1
]}

Xu, Ruize ^{[2
]}

Corigliano, Alberto ^{[1
]}

Kim, Sang-Gook ^{[2
]}

机构：

[1] Department of Civil and Environmental Engineering, Politecnico di Milano, Piazza Leonardo da Vinci 32, Milano,20133, Italy

[2] Micro and Nano Systems Laboratory, Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge,MA,02139, United States

来源：

Energy Harvesting and Systems | 2014年 / 1卷 / 03期

关键词：

Bandwidth - Frequency domain analysis - Laminating - MEMS - Nonlinear equations - Piezoelectricity - Resonators;

D O I：

10.1515/ehs-2014-0005

中图分类号：

学科分类号：

摘要：

Piezoelectric microelectromechanical systems (MEMS) energy harvesting is an attractive technology for harvesting small energy from ambient vibrations. Increasing the operating frequency bandwidth of such devices is one of the major challenges to be solved for real-world applications. A MEMS-scale doubly clamped nonlinear beam resonator has demonstrated very wide bandwidth and high-power density among the energy harvesters reported. In this paper, a first complete theoretical discussion of nonlinear resonance-based piezoelectric energy harvesting is provided. The sectional behavior of the beam has been studied through the Classical Lamination Theory (CLT) specifically modified to introduce the piezoelectric coupling and nonlinear Green-Lagrange strain tensor. A lumped parameter model has been built through Rayleigh-Ritz method and the resulting nonlinear coupled equations have been solved in the frequency domain through the Harmonic Balance Method (HBM). Finally, the influence of external load resistance on the dynamic behavior has been studied. The theoretical model shows that nonlinear resonant harvesters have much wider power bandwidth than that of linear resonators but their maximum power is still bounded by the mechanical damping as is the case for linear resonating harvesters. © 2014 by De Gruyter 2014.

引用

页码：179 / 187