• Title, Summary, Keyword: Hoverable UAV

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Autolanding Mission Planning of the IT Convergence Hoverable UAV (IT 융합 회전익 무인항공기의 자동 착륙 임무수행)

  • Jung, Sunghun;Kim, Hyunsu
    • Journal of the Korea Convergence Society
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    • v.8 no.6
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    • pp.9-16
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    • 2017
  • Researchers are now faced with a limited flight time of the hoverable UAV due to the sluggish technological advances of the Li-Po energy density and try to find a bypassing solution for the fully autonomous hoverable UAV mission planning. Although there are several candidate solutions, automated wireless charging is the most likely and realistic candidate and we are focusing on the autolanding strategy of the hoverable UAV in this paper since it is the main technology of it. We developed a hoverable UAV flight simulator including Li-Po battery pack simulator using MATLAB/Simulink and UAV flight and battery states are analyzed. The maximum motor power measured as 1,647 W occurs during the takeoff and cell voltage decreases down to 3.39 V during the procedure. It proves that the two Li-Po battery packs having 22 Ah and connected in series forming 12S1P are appropriate for the autolanding mission planning.

IT Convergence UAV Swarm Control for Aerial Advertising (공중 광고를 위한 IT 융합 무인항공기 군집 제어)

  • Jung, Sunghun
    • Journal of the Korea Convergence Society
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    • v.8 no.4
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    • pp.183-188
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    • 2017
  • As the price of small UAVs is getting cheaper and its controllability is getting greatly increased, many aerial applications using both fixed-wing and hoverable UAVs have appeared in recent years. In this paper, a new aerial advertising method is proposed using four hoverable UAVs. Using the UAV swarm control method, four UAVs are maneuvered to carry a $7.07{\times}7.07m^2$ square banner along collision-free and predefined waypoints for aerial advertising. According to simulation results, it takes about 270 s for UAVs to perform aerial advertising in $669{\times}669m^2$ size area and the minimum distance among UAVs turns out to be 0.45 m which proves there is no any collision. Due to abrupt direction changes of UAVs along the predefined waypoints, UAVs cannot always maintain exact square formation and it results the maximum and minimum side lengths of square formation to be 10.35 m and 1.96 m, respectively. Also, the maximum and minimum diagonal lengths of square formation turn out to be 14.75 m and 2.78 m, respectively.

Optimal Battery Pack Design Tool for the Delivery UAV (배송용 무인항공기를 위한 최적 배터리팩 설계 툴)

  • Jung, Sunghun;Jeong, Heon
    • Journal of the Korea Convergence Society
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    • v.8 no.6
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    • pp.219-226
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    • 2017
  • As the UAV industry is getting matured, various types of UAVs have appeared in many application fields, including filming, reconnaissance, rescue, and etc. and it requires the quick hardware designs, particularly a battery pack, of the UAV. We developed the automatic battery pack design tool for the convenient battery pack configuration design of the hoverable type delivery UAV. With inputs, including current profile, voltage profile, various kinds of cell specifications, desired battery pack voltage, and etc. the automatic battery pack design tool calculates a pack having the minimum weight and the maximum capacity by combining either homogeneous cells or heterogeneous cells. Also, the tool could predict the capacity fading trend of the designed battery pack configuration.