• 제목/요약/키워드: Quad-rotor blade vehicle

검색결과 4건 처리시간 0.02초

전산유체역학을 통한 PAV의 로터 블레이드 축간거리에 따른 호버링 성능 변화 연구 (A Study on Hovering Performance of Personal Air Vehicle According to Distance between Rotor Blade Axis via Computational Fluid Dynamics)

  • 윤재현;노우승;도재혁
    • 한국기계가공학회지
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    • 제21권5호
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    • pp.53-60
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    • 2022
  • In this study, the conceptual design and performance evaluation of a personal air vehicle (PAV) is presented, which is a potential futuristic individual transportation. The blade element theory (BET) is employed to compute a rotational velocity. A computational fluid dynamics (CFD) simulation is performed to investigate the difference in the thrust performance in the rotor axis distance of a quad-copter PAV in hovering. Modal analysis is performed to create a Campbell diagram to investigate critical speed. Consequently, a quad-copter PAV changes the aerodynamics thrust and critical velocity according to the rotor axis distance.

수직이착륙기 설계 및 제작 (The design and production of the Vertical takeoff and landing aircraft)

  • 이웅희;박용수;배재성
    • 항공우주시스템공학회지
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    • 제2권4호
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    • pp.19-24
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    • 2008
  • In this study gives detail on the composition and process of Quad-rotor blade Vehicle. It may seem simple but we have many trouble because of many subtleties. Unless designed carefully, it is very difficult to control of stability by reason of disturbances in the air and unbalance in the motor. We want to have a more stable output so add other electronics supplement, and change the battery in oder to increasing thrust. It cannot be done quickly, nor cheaply because it is more difficult than first ideas that control of Quad-rotor. But we complete manufacture of basically controllable vertical takeoff and landing aircraft.

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Attitude Stabilization of a Quad-Rotor UAV Using a Two-camera Vision System

  • Won, Dae-Yeon;Tahk, Min-Jea
    • International Journal of Aeronautical and Space Sciences
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    • 제9권1호
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    • pp.76-84
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    • 2008
  • This paper is mainly concerned with the vision-based attitude stabilization of a quad-rotor UAV. The methods for attitude control rely on computing the roll and pitch angles of the vehicle from a two-camera vision system. One camera is attached to the body-fixed x-axis and the other to the body-fixed y-axis. The attitude computation for the quad-rotor UAV is performed by image processing consisting of Canny edge and Hough line detection. A proportional and integral controller is employed for the attitude hold autopilot. In this paper, the quad-rotor UAV is modeled by 6-DOF nonlinear equations of motion that includes rotor aerodynamics with blade element theory. The performance of the proposed method is evaluated through 3D environmental numerical simulations.

회전하는 블레이드 주위의 유동가시화 및 전산유동해석 (Visualization and Computational Analysis for Flow around Rotating Blades)

  • 기현;최종욱;김성초
    • 한국가시화정보학회지
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    • 제8권1호
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    • pp.39-45
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    • 2010
  • The optimal design is needed for the blade geometry of the quad-rotor blades which is mainly used for Unmanned Aerial Vehicle. To do this, it is important to analyze the wakes under the blades. In the present study, the flow around the rotating blades was analyzed using PIV(Particle Image Velocimetry) and CFD(Computational Fluid Dynamics). The maximum axial velocity was measured at about 60% position toward the radial direction of the blade. The positions of vorticities in the test section obtained by PIV and CFD were turned out to be almost alike. The values in the difference of pressure coefficients at the upper and the lower blades were increased depending on the radial direction. Then, the values were decreased at the blade tip. The data of the flow analysis in the present study are expected to be served as the design of blades and ducts for the thrust improvement in the future.