2021 Fiscal Year Final Research Report
Research on the enhancement of the safety and assessment of the influences on the surroundings for the manned and unmanned multiple-rotor-type aircraft
| Project/Area Number |
19H02344
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 24010:Aerospace engineering-related
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| Research Institution | Nagoya University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
得竹 浩 金沢大学, フロンティア工学系, 教授 (80295716)
田辺 安忠 国立研究開発法人宇宙航空研究開発機構, 航空技術部門, 主幹研究開発員 (80724799)
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | ドローン / 空飛ぶクルマ / 騒音 / 風 / 安全 / オートロ―テーション / マルチロータ機 |
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| Outline of Final Research Achievements |
(1)It was revealed that the peak value of downwash and its position were affected by the damage level of rotor. The method estimating downwash has been newly proposed.(2)Vertical autorotation was proposed as an emergency landing technique for a multirotor drone suffering a total loss of one motor. The vertical autorotation consists of two phases. In phase 1, all rotors operate in windmill mode. In phase 2, two rotors, including a damaged one, operate in windmill mode while the other two operate in propeller mode.(3)It was revealed that the ground effect of the quadrotor drone shows different trend compared to the conventional single-rotor helicopter. The outwash from each rotor mainly flows along the ground and decays proportional to the individual rotor size, while the outwash from the gap of the rotor is strong up to a higher altitude. This outwash feature should be paid attention to keep the personals or objectives on the ground safe.
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| Free Research Field |
航空機力学
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| Academic Significance and Societal Importance of the Research Achievements |
(1)吹き下ろしの提案推定手法を利用することで，損傷の直接推定や損傷や飛行環境の変化によるダイナミクス変化を補償する新しい飛行制御則の実現が期待できる．(2)クアドロータドローンにおいて1モータの故障が飛行に与える影響は大きい．クアドロータドローンにおける１モータ故障時の安全着陸の手法を提案した．(3)マルチロータ型eVTOLやドローンが，離着陸する際に地面の影響を受け飛行が不安定になりやすいこと，ロータの間の断面においては高高度まで強い風が横に噴き出しており地上人員・物資への影響に注意が必要であることを示した．以上の成果は，マルチロータ型eVTOLやドローンの安全な利用に貢献できる．
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