2023 Fiscal Year Final Research Report
Study of the resonator automatically follows excitation frequency for a high performance vibration-powered generator
| Project/Area Number |
21K03937
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 20010:Mechanics and mechatronics-related
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| Research Institution | Kyushu University |
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Principal Investigator |
Inoue Takumi 九州大学, 工学研究院, 教授 (40274485)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | 自動同調 / 共振 / 振動発電 / 受動型制御 / 非線形振動 |
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| Outline of Final Research Achievements |
In vibration power generation, when the frequency of excitation matches the natural frequency of the oscillator, large vibration (resonance) occurs and highly efficient power generation can be realized. The applicant has devised a mechanism in which the natural frequency of the resonator automatically follows changes in the excitation frequency without the use of a control system, and large vibrations are always generated. The purpose of this research is to clarify the principle of operation of this mechanism and to establish the basic theory of a device that realizes highly efficient vibration power generation with a very simple structure. Specifically, a vibration model was constructed to explain the motion of the proposed device, and the motion of the device was reproduced by numerical simulation. This clarified the basic principle of automatic tuning to a resonant state and provided fundamental knowledge for practical application.
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| Free Research Field |
機械力学，振動学
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| Academic Significance and Societal Importance of the Research Achievements |
インフラ設備のモニタリングなどスマートシステムの個別電源としての利用が多い振動発電は，加振振動数が振動子の固有振動数から離れると発電効率が低下する問題がある．振動子の固有振動数を加振振動数に追従して同調させることができれば常に高効率の発電を実現できるが，そのためには通常は能動制御が必要であり，装置の複雑化，高価格化は免れない．個別電源の条件として制御装置の付加は望ましくない．本研究で提案した装置は，能動制御を行わず非常に簡単な構造で加振振動数への共振振動数の同調が可能とし，コスト上昇をともなわずスマートシステムの性能向上に大きな役割を果たすものである．
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