2024年9月24日 · To address these issues, this paper presents a coaxial ducted fan UAV which is equipped with electromagnets mounted externally on the fuselage, enabling safe grasping and transfer of multiple loads in midair without complex additional actuators. It also has the capability to achieve direct human-UAV cargo transfer in the air.

The vehicle can carry 4x the payload of a similar footprint fixed- or open-wing UAV. Ducted fan UAVs are backpack-able and tube-deployable unlike fixed- and open-wing UAVs. Ducted fan UAVs are easily scaled to specific missions or applications. They can carry as little as a few ounces and hover and stare for 10 minutes or they can carry as much ...

2020年8月1日 · Fig. 1 and Table 1 illustrate the ducted fan UAV and its geometric properties. As shown in Fig. 1, the ducted fan UAV equipped with a pair of axial contra-rotating fans shrouded by an annular duct with an inlet radius at 200 mm.The structures of the duct and the rotating fan were built using stereolithography plastic 3D printing techniques so as …

UAV members and can also cooperate as a single entity by physical connection. The ducted-fan unmanned aerial vehicle (UAV) is manufactured in-house and equipped with a connected surface and an assembly device on the side to perform connection and separation tasks. Moreover, the control system was designed using an open-source autopilot environment,

2023年4月11日 · When the ducted-fan drones carry out emergency tasks in narrow zones, such as the Search and Rescue in the event of a disaster (Husain et al., Citation 2022), the complex and changeable environment will cause aerodynamic interference to the ducted fan. In case that the disturbance is strong enough and develops over time, the stability of the ...

center body, similar to a Mercury all-metal electric ducted fan. This is a common parctice to address heat buildup. This technique was originally implemented for turboprop engine inlets to avoid ingestion of turbulent air flow behind propellers (Reference 3). Two UAV scale fans that implement this strategy for cooling are shown in Figure 5.4.

It was not until 2014 that a new concept of ducted fan UAV appeared. This one was equipped with several rotors located outside the duct around the main rotor to control the UAV in ight. These models, such as the Hummingbird, promise a ight autonomy of several hours, enough to make investors dreaming and to open new perspectives for the civil ...

2024年7月26日 · Due to the remarkable maneuverability and high flexibility, unmanned aerial vehicles (UAVs) have been widely deployed in civilian and military scenarios [1,2,3,4].The ducted-fan drone is expected to become the main configuration of UAVs in the future owing to high efficiency and minimal noise [].Compared with traditional rotorcraft, ducted-fan drones have propeller or fan blades shrouded by ...

2010年3月1日 · Ducted fan vehicle flight dynamics in crosswind exhibits complex aerodynamics phenomena. This matter was widely explored in the 50 and 60s (Ando, 1987), with the development of the Hiller platform VZ-1 in the United States or the V/STOL tilt rotor Nord 500 in France (see Fig. 1).Later, as the ducted propellers appeared to be much more difficult to implement than free ones, these projects were ...

2009年11月10日 · Based on unique aerodynamic characteristics from CFD calculation and theoretical method the flight dynamics of ducted fan UAV is able to be modeled and simulated accurately. MATLAB/Simulink V-Realm Builder is a design and modeling software tool for air vehicles that is capable of modeling the performance and flight dynamics during the ...