Theoretical modeling and analysis of two-degree-of-freedom piezoelectric energy harvester with stopper

This paper presents a study of a two-degree-of-freedom (2DOF) piezoelectric energy harvester (PEH) under concurrent aeroelastic and base excitation. The governing equations of the theoretical model under the combined excitation are developed and solved analytically using the harmonic balance method. Based on the electro-mechanical analogies, an equivalent circuit model is established. The energy harvesting performance of the 2DOF PEH under different wind speeds but the same base excitation is investigated. Voltage amplitudes of various response components with different frequencies are predicted by the analytical method and verified by the circuit simulation. The root-mean-square (RMS) voltage is used to measure the actual performance of the 2DOF PEH. Around the resonance state, the 2DOF PEH has been found to produce a larger voltage output than the conventional SDOF PEH. Moreover, several interesting phenomena, such as the quasi-periodic oscillation and the peak-to-valley transition, have been observed in the circuit simulation and explained by the analytical solution. The developed methodology in this paper can be easily adapted to analyze other similar types of multiple-degree-of-freedom (MDOF) PEHs under concurrent aeroelastic and base excitation.

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Development of a broadband nonlinear two-degree-of-freedom piezoelectric energy harvester

Journal of Intelligent Material Systems and Structures ◽

10.1177/1045389x14541494 ◽

2014 ◽

Vol 25 (14) ◽

pp. 1875-1889 ◽

Cited By ~ 81

Author(s):

Hao Wu ◽

Lihua Tang ◽

Yaowen Yang ◽

Chee Kiong Soh

Keyword(s):

Energy Harvester ◽

Degree Of Freedom ◽

Piezoelectric Energy ◽

Two Degree Of Freedom

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The effects of nonlinear energy sink and piezoelectric energy harvester on aeroelastic instability of an airfoil

Journal of Vibration and Control ◽

10.1177/1077546321993585 ◽

2021 ◽

pp. 107754632199358

Author(s):

Ali Fasihi ◽

Majid Shahgholi ◽

Saeed Ghahremani

Keyword(s):

Energy Harvester ◽

Equations Of Motion ◽

Continuation Method ◽

Dynamical Behavior ◽

Harmonic Balance Method ◽

Nonlinear Energy Sink ◽

Piezoelectric Energy ◽

Energy Sink ◽

Two Degree Of Freedom ◽

Nonlinear Energy

The potential of absorbing and harvesting energy from a two-degree-of-freedom airfoil using an attachment of a nonlinear energy sink and a piezoelectric energy harvester is investigated. The equations of motion of the airfoil coupled with the attachment are solved using the harmonic balance method. Solutions obtained by this method are compared to the numerical ones of the pseudo-arclength continuation method. The effects of parameters of the integrated nonlinear energy sink-piezoelectric attachment, namely, the attachment location, nonlinear energy sink mass, nonlinear energy sink damping, and nonlinear energy sink stiffness on the dynamical behavior of the airfoil system are studied for both subcritical and supercritical Hopf bifurcation cases. Analyses demonstrate that absorbing vibration and harvesting energy are profoundly affected by the nonlinear energy sink parameters and the location of the attachment.

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