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RISS 인기검색어
- 검색키워드
- 저자 : Kazuya Maesato (검색결과 1 건)
- 무료
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- 유료
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Development of a Resonance Type Flapping Wing for a Dragonfly-Type Micro Aerial Vehicle
Koji Isogai,Kazuya Maesato,Yuichi Kamisawa,Kenji Sato 한국항공우주학회 2008 한국항공우주학회 학술발표회 논문집 Vol.- No.-
The paper presents the development of resonance type flapping wings for a dragonfly-type micro aerial vehicle. which show high performance in spite of their simple structures and light weight. The wings (fore- and hind-wings) are composed of a single carbon rod of 1 ㎜ diameter and the thin EPP (Expanded Polypropylene) plate of 1.5 ㎜ thickness for the fore-wing and 3.0 ㎜ thickness for the hind-wing, respectively. The semi-span lengths of the wings are 0.11 m. The planforrns of the fore- and hind-wings are those of Onychogomphus viridicastus. The mass of the fore-wing is 0.25 g and that of the hind-wing is 0.30 g. The first natural frequencies of the fore- and hind-wings are 39 Hz and 47 Hz, respectively. The detailed performance of the wings such as time mean thrust and necessary power in still air (hovering condition) are measured using the vibration test bed. For example, the thrust is 0.095 N for the fore-wing and 0.111 N for the hind-wing at the frequency of 40 Hz. This means that the dragonfly-type MAV which employs the two-pairs of those flapping wings can generate the lift of 0.41 N (in hovering condition) at 40 Hz. In order to confirm this, a hovering demonstrator (mass: 40 g) which employs the present two pairs of the wings was built and tested. verifying that it can generate the lift which is larger than its own weight at flapping frequency of 40 Hz. The paper also presents the results of the numerical simulations of those flapping wings using a 3D Navier-Stokes code which takes into account aeroelastic effects.
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