| Project/Area Number |
16K18039
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Dynamics/Control
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| Research Institution | Kanazawa University |
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Principal Investigator |
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| Project Period (FY) |
2016-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | 非線形回路 / 機械スイッチ / 振動発電 / 広帯域化 / 連成解析 / 折り畳みバネ / 折り畳み |
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| Outline of Final Research Achievements |
In aiming at both increase in the output power and wider frequency band width in vibration energy harvesters, we proposed a mechanically switching nonlinear circuit. We designed a folded-spring structure for the mechanical switch, and revealed the optimal condition of the structure. Furthermore, we have developed a two-way coupling simulation technique that allows us to evaluate the practical performance of the harvester connected with the nonlinear circuit, alternately solving the simultaneous equation concerning the mechanical vibration and the electrical circuit. The numerical results show that the nonlinear circuit, which boots up the voltage, may suppress the vibrational amplitude and thus decrease the resulting output power. We investigated the performance for the electronic and mechanical switch nonlinear circuits, both numerically and experimentally, and revealed that the output power for the mechanical switch can exceed that for the electronic one in highly coupled harvesters.
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