2021 Fiscal Year Final Research Report
Elucidation of the unstable flight mechanism of butterflies aiming at a breakthrough in the development of micro air vehicles
Project/Area Number |
19K14885
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Research Category |
Grant-in-Aid for Early-Career Scientists
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Allocation Type | Multi-year Fund |
Review Section |
Basic Section 19010:Fluid engineering-related
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Research Institution | Shinshu University |
Principal Investigator |
Suzuki Kosuke 信州大学, 学術研究院工学系, 准教授 (10735179)
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Project Period (FY) |
2019-04-01 – 2022-03-31
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Keywords | 羽ばたき飛翔 / 数値流体力学 / 超小型飛翔体 |
Outline of Final Research Achievements |
We investigated the flapping flight of butterflies to elucidate how butterflies achieve their fast forward speed and skillful attitude control. We captured the motion of a butterfly in take-off or in forward flight by using high speed cameras, and we obtained time series data of its trajectory and joint angles. By using these data, we constructed a numerical butterfly model which faithfully reflects the shape and movement of the actual butterfly. We clarified the relationship between the motion and the aerodynamic and inertial forces through coupling simulations of the butterfly model and ambient air by using the immersed boundary-lattice Boltzmann method. In addition, we attempted some attitude control schemes by abdominal motion, phase shift between fore- and hind-wings, and lead-lag motion of wings through simulations using a simplified model, but the results had a large difference from the motion of an actual butterfly. A realistic attitude control remains for future work.
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Free Research Field |
数値流体力学
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Academic Significance and Societal Importance of the Research Achievements |
研究期間内に実施した研究はいずれも,蝶の飛翔メカニズムを解明するための基礎的な研究であり,実際のモノ(超小型飛翔体)への応用はまだできていない.しかしながら,本研究を通して,蝶の飛翔メカニズムに関して多くのことが明らかになるとともに,蝶の巧みな姿勢制御を応用できる可能性があることが示唆されている.これらの知見を用いて超小型飛翔体を設計できれば,今までにない小型・軽量でかつ俊敏なドローンが開発できると期待される.
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