2023 Fiscal Year Final Research Report

High-power broadband vibration energy harvesting by a low-loss nonlinear oscillator using diamagnetic levitation

Research Project

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Project/Area Number	21K03936
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Multi-year Fund
Section	一般
Review Section	Basic Section 20010:Mechanics and mechatronics-related
Research Institution	Kyoto Institute of Technology
Principal Investigator	Masuda Arata 京都工芸繊維大学, 機械工学系, 教授 (90252543)
Project Period (FY)	2021-04-01 – 2024-03-31
Keywords	環境振動発電 / 非線形振動 / 反磁性 / 磁気浮上 / 電力 / 制御 / 安定化
Outline of Final Research Achievements	Vibration energy harvesting is a technology that captures vibration energy ubiquitous in the environment and converts it to electric power. Aiming to raise this technology to a social implementation level, this study presented several technologies for realizing high and broadband power generation performance. First, a design methodology for broadband vibration energy harvesting devices using nonlinear resonators was established, and as an application of this methodology, a procedure for designing resonators with flat power generation within their bandwidth was developed . Next, a method to reduce losses in passive magnetic levitation technology using diamagnetic materials was proposed, and design theory for realizing low-loss nonlinear oscillators was investigated. Finally, the response stabilization control to maintain stable high energy response of nonlinear broadband vibration energy harvesters was theoretically investigated, and its self-powered operation was achieved.
Free Research Field	機械力学および計測制御，特に構造や材料の非線形力学を利用した知的構造システムの創成
Academic Significance and Societal Importance of the Research Achievements	さまざまなモノに取り付けた無線センサを介して得られる大量の情報をインターネットを通して活用するIoTネットワークでは，大量のセンサへの電源供給手段とその保守コストが重要な問題になる．特に少子高齢化が進み労働人口が減少していく我が国では，これらの知的情報インフラの維持管理にコストを掛けることができない．その解決策の一つとして，センサ周辺の環境振動の力学的エネルギーを利用する振動発電技術がある．本研究における成果は，振動発電の社会実装を妨げている幾つかの課題の解決をもたらすものであり，持続可能でレジリエントな社会・産業における知的情報ネットワーク基盤の確立に資する．