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Resonant frequency of bimorph triangular V-shaped piezoelectric cantilever energy harvester

Year: 1395
COI: JR_JCARME-6-1_006
Language: EnglishView: 244
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Rouhollah Hosseini - Young Researchers and Elite Club, South Tehran Branch, Islamic Azad University, Tehran, Iran
Mohsen Hamedi - Faculty of Mechanical Engineering, University of Tehran, Tehran


The concept of energy harvesting is to design smart systems to capture the ambient energy and to convert it to usable electrical power for supplying small electronics devices and sensors. The goal is to develop autonomousand self-powered devices that do not need any replacement of traditional electrochemical batteries. Now piezoelectric cantilever structures are being used to harvest vibration energy for self-powered devices. However, thegeometry of a piezoelectric cantilever beam will greatly affect its vibration energy harvesting ability. This paper deduces a remarkably precise analytical formula for calculating the fundamental resonant frequency of bimorph Vshapedcantilevers using Rayleigh method. This analytical formula, which is convenient for mechanical energy harvester design based on Piezoelectriceffect, is then validated by ABAQUS simulation. This formula raises a new perspective that, among all the bimorph V-shaped cantilevers and in comparison with rectangular one, the simplest tapered cantilever beam canlead to maximum resonant frequency and highest sensitivity. The derived formula can be commonly used as a relatively precise rule of thumb in such systems.


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Hosseini, Rouhollah and Hamedi, Mohsen,1395,Resonant frequency of bimorph triangular V-shaped piezoelectric cantilever energy harvester,

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Type of center: Azad University
Paper count: 12,110
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