A Study of Electromechanical Behavior of Piezoelectric Energy-Harvesting System Using Finite Element Method
Date Issued
2011
Date
2011
Author(s)
Chen, Kuan-Ting
Abstract
The research of energy harvesting from environmental resources has received increasing attention due to the decreasing supply of fossil energy. With the advances of MEMS technology and the reduction of power requirement in electronic devices, harvesting energy from vibration sources becomes achievable.
This thesis studies the vibration-based piezoelectric energy harvesting based on the finite element simulation. First, the mathematical model is established using the force balance principle and the piezoelectric governing equations. Second, the finite simulation is validated by a series of experiment. The main result is the investigation of the frequency response of the piezoelectric cantilever beam endowed with the standard interface. As the current commercial finite element codes are not able to be integrated with the circuit simulators, we propose an “Equivalent Impedance” method to resolve this difficulty. The results are consistent with the theoretical predictions and agree well with experimental observations. The effect of geometry of cantilever configurations on harvested power is also studied.
This thesis studies the vibration-based piezoelectric energy harvesting based on the finite element simulation. First, the mathematical model is established using the force balance principle and the piezoelectric governing equations. Second, the finite simulation is validated by a series of experiment. The main result is the investigation of the frequency response of the piezoelectric cantilever beam endowed with the standard interface. As the current commercial finite element codes are not able to be integrated with the circuit simulators, we propose an “Equivalent Impedance” method to resolve this difficulty. The results are consistent with the theoretical predictions and agree well with experimental observations. The effect of geometry of cantilever configurations on harvested power is also studied.
Subjects
Piezoelectric energy harvesting system
Finite element method
Standrad interface
Type
thesis
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