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Academic Journal

基于Simulink 的某型无人直升机舰面悬停特性分析.

Subjects: *ROTORS (Helicopters); *WIND speed; *LINEAR statistical models

  • Source: Journal of Nanjing University of Aeronautics & Astronautics / Nanjing Hangkong Hangtian Daxue Xuebao. 2021, Vol. 53 Issue 3, p408-414. 7p.

  • Abstract: The balance characteristics of single⁃rotor helicopter with tail rotor hovering in ship airwake are modeled and simulated by using Matlab/Simulink. Firstly,the CFD ... 应用Matlab/Simulink 对单旋翼带尾桨直升机在舰船尾流场中悬停时的平衡特性进行建模和仿真分析。 首先采用CFD 软件计算SFS2 舰在不同风速和风向下尾部甲板上方的流场。然后将其与旋翼流场相耦合,在 Simulink 软件中建立单旋翼带尾桨直升机舰面起降飞行动力学模型,应用Simulink 线性分析工具箱,对某型无人 直升机在SFS2 舰尾部甲板上方悬停时的平衡特性进行了仿真分析。最后总结了舰面流场对该无人直升机近舰 面悬停时操纵量和姿态角的影响。 [ABSTRACT FROM AUTHOR]Copyright of Journal of Nanjing University of Aeronautics & Astronautics / Nanjing Hangkong Hangtian Daxue Xuebao is the property of Editorial Department of Journal of Nanjing ...

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Academic Journal

Analysis of Inverted Rotors in Multirotor Aerial Vehicles With VTOL.

Subjects: Rotors; Drone aircraft; Aerial propellers

  • Source: IEEE Transactions on Vehicular Technology. Jun2018, Vol. 67 Issue 6, p5535-5539. 5p.

  • Abstract: This correspondence paper explores the efficiency of common propulsion systems present in electric multirotors or drones with normal (tractor) and inverted (pusher) configuration

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Periodical

'Mule' hover test follows selection of powerplant.

Subjects: *Prototypes; Remotely piloted vehicles; RotorsUrban Aeronautics Ltd. ; Aerocomposites Inc. ; Turbomeca SA

  • Source: Flight International. 9/30/2008, Vol. 174 Issue 5158, p30-30. 2/5p.

  • Abstract: The article reports that Urban Aeronautics has received delivery of the first set of ducted fan rotors for its prototype "Mule" ...

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Periodical

'Learning' UAV prepared for urban warfare demonstrations.

Subjects: *Computer software; Remotely piloted vehicles; RotorsUnited StatesGeorgia Institute of Technology

  • Source: Flight International. 3/8/2005, Vol. 167 Issue 4975, p31-31. 1/5p.

  • Abstract: Focuses on GTMax, an unmanned air vehicle rotorcraft developed by the U.S. Georgia Institute of Technology. Basis of the development of GTMax; Information on ...

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Periodical

UCAR systems efforts stepped up.

Subjects: *PROTOTYPES; Rotors (Helicopters); Remotely piloted vehiclesUnited StatesLockheed Martin 834951691 Lockheed Martin Lockheed Martin 834951691 834951691 Lockheed Martin 834951691 LMT; Northrop Grumman Corp. 016435559 Northrop Grumman Corp. Northrop Grumman Corp. 016435559 016435559 Northrop Grumman Corp. 016435559 NOC; United States. Army

  • Source: Flight International. 8/5/2003, Vol. 164 Issue 4894, p16. 1/2p. 1 Color Photograph.

  • Abstract: Presents an update on the Unmanned Combat Armed Rotorcraft (UCAR) program of the U.S. Army and the Defense Advanced Research Projects Agency as of ...

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Academic Journal

Hub Drag-Reduction Strategies of Canard Rotor/Wing Unmanned Aerial Vehicles.

Subjects: *ROTOR dynamics; *ROTORS (Helicopters); *REMOTELY piloted vehicles

  • Source: Journal of Aircraft. Jul/Aug2007, Vol. 44 Issue 4, p1388-1388. 1p. 1 Black and White Photograph.

  • Abstract: The article discusses a study on drag reduction strategies of Canard rotor/wing (CRW) unmanned aerial vehicles. CRW is an aircraft that has the capabilities ...

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Academic Journal

An integral predictive/nonlinear control structure for a quadrotor helicopter

Subjects: *PREDICTIVE control systems; *NONLINEAR control theory; *ROTORS (Helicopters)

  • Source: Automatica. Jan2010, Vol. 46 Issue 1, p29-39. 11p.

  • Abstract: Abstract: This paper presents an integral predictive and nonlinear robust control strategy to solve the path following problem for a quadrotor helicopter. The dynamic motion ... Copyright of Automatica is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed ...

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Academic Journal

Performance and Stability Analysis of a Shrouded-Fan Unmanned Aerial Vehicle.

Subjects: *REMOTELY piloted vehicles; *STABILITY (Mechanics); *ROTORS

  • Source: Journal of Aircraft. May/Jun2006, Vol. 43 Issue 3, p681-691. 11p. 1 Chart, 10 Graphs.

  • Abstract: This paper deals with the estimation of the performance and stability for a shrouded-fan unmanned rotorcraft whose mission profile also prescribes the flight in ground ... Copyright of Journal of Aircraft is the property of American Institute of Aeronautics & Astronautics and its content may not be copied or emailed to ...

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Periodical

Miniature UAVs ready for delivery after tests.

Subjects: *Helicopters; Drone aircraft; Remotely piloted vehiclesNaval Research Laboratory (U.S.)

  • Source: Flight International. 8/16/2005, Vol. 168 Issue 4998, p20-20. 1/3p. 1 Color Photograph.

  • Abstract: Focuses on the Scientific Payload Insertion Device Electric Rotor unmanned helicopter unveiled by the U.S. Naval Research Laboratory in August 2005. Price of the helicopter.

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Periodical

US Army shifts gears to add UAVs.

Subjects: Military helicopters; United States. Army. Aviation Applied Technology Directorate; Rotors (Helicopters)United States

  • Source: Flight International. 2/12/2002, Vol. 161 Issue 4818, p26. 1/4p. 1 Color Photograph.

  • Abstract: Discusses the plan of the Aviation Applied Technology Directorate under the U.S. Army to demonstrate a rotorcraft drivetrains for unmanned air vehicles. Purchase contract ...

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