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곤충 모방 날갯짓 비행체의 안정적인 수직 이륙 비행 구현
판호앙부(Hoang-Vu Phan),트롱쾅트리(Quang-Tri Truong),구옌쿠옥비엣(Quoc-Viet Nguyen),박훈철(Hoon Cheol Park),변도영(Doyoung Byun),구남서(Nam Seo Goo) 제어로봇시스템학회 2012 제어·로봇·시스템학회 논문지 Vol.18 No.2
This paper demonstrates how to implement inherent pitching stability in an insect-mimicking flapping-wing system for vertical takeoff. Design and fabrication of the insect-mimicking flapping-wing system is briefly described focusing on the recent modification. Force produced by the flapping-wing systems is estimated using the UBET (Unsteady Blade Element Theory) developed in the previous work. The estimation shows that the wing twist placed in the modified system can improve thrust production for about 10 %. The estimated thrust is compared with the measured thrust, which proves that the UBET provides fairly good estimations for the thrust produced by the flapping-wing systems. The vertical takeoff test shows that inherent pitching stability can be implemented in an insect-mimicking flapping-wing system by aligning the aerodynamic force center and center of gravity.
Hoang Vu Phan(판호앙부),Hoon Cheol Park(박훈철) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
In this work, a control mechanism for attitude change in an insect-like tailless flapping-wing MAV has been developed. This mechanism, which is called Trailing Edge Change (TEC) mechanism, is able to manipulate the wing kinematics resulting in redirection of the force vector generated by flapping wings and finally creating control moments. The control mechanism was combined to the flapping-wing mechanism, which transfers the rotary motion from an installed motor to large flapping motion of 190° by the combination of four-bar linkage and pulley-string mechanism. The measurement performed using a 6-axis force/torque transducer proved that the TEC mechanism is effective to produce control moments while changing the wing-root deflection angle between ±9°. The maximum produced moments can be reached to about 100 gf.㎜ for pitch and roll attitudes, and 45 gf.㎜ for yaw attitude.
꼬리날개 없는 곤충모방 날갯짓 초소형 비행체: 현황 및 전망
박훈철,판호앙부,이정호 제어·로봇·시스템학회 2019 제어·로봇·시스템학회 논문지 Vol.25 No.11
This paper provides a review and perspective of an insect-mimicking tailless flapping-wing micro air vehicle (FW-MAV), beginning with identifying key differences between bird-like FW-MAVs and insect-like tailless FW-MAVs. Unlike bird-like FW-MAVs, insect-like FW-MAVs have no control surfaces on a tail; thus, flapping wings must produce flight force and control movement simultaneously. Since the objective of insect-like FW-MAVs is to fly in a nearby area and gather information, they must hover and perform agile maneuvering. In the sense that rotary-wing MAVs (RW-MAVs), also known as multi-rotor drones, can hover, insect-like FW-MAVs and RW-MAVs may have similar mission profiles. Due to the technical difficulty of designing and building a tailless FW-MAV, RW-MAVs are much more popular in the current application of MAVs. However, tailless FW-MAVs have more research challenges than RW-MAVs. Thrust enhancement, efficiency consideration, gust response, noise reduction, and agile maneuverability should be the focus of research on real-world applications of tailless FW-MAVs. The advantages of tailless FW-MAVs over RW-MAVs might be revealed through such research, despite the popularity of RW-MAVs.