2017 Fiscal Year Final Research Report
Electricity Generation System with Piezoelectric Element Using Mechanical-Acoustic Coupling
Project/Area Number |
15K05874
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Dynamics/Control
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Research Institution | Tokai University |
Principal Investigator |
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Project Period (FY) |
2015-04-01 – 2018-03-31
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Keywords | 圧電素子 / 振動発電 / 円板 / 円筒形音場 / 電気機械連成 / 機械音響連成 |
Outline of Final Research Achievements |
A new energy-harvesting system with piezoelectric elements is proposed in this study. The system is composed of a cylinder and thin plates at both ends. The piezoelectric elements are installed at the centers of both plates, and one side of each plate is subjected to a harmonic or random point force. In this system, vibration energy is converted into electrical energy via the piezoelectric elements. In addition, the acoustic energy radiated from the plate induces a self-sustained vibration at the other plate via mechanical-acoustic coupling. The characteristics are estimated theoretically and experimentally from the electric power in the electricity generation, the mechanical power supplied to the plate and the electricity generation efficiency that is derived from the ratio of both types of power. In particular, the electricity generation efficiency is one of the most appropriate factors to evaluate the performance of electricity generation systems.
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Free Research Field |
機械力学,音響工学,構造力学
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