Results 1 to 10 of about 904 (118)

Estimation of Airflow Parameters for Tail-Sitter UAV through a 5-Hole Probe Based on an ANN [PDF]

open access: yesSensors, 2022
Fixed-wing vertical take-off and landing (VTOL) UAVs have received more and more attention in recent years, because they have the advantages of both fixed-wing UAVs and rotary-wing UAVs.
Xiaoda Li   +4 more
doaj   +2 more sources

Trajectory tracking sliding mode control for vertical take-off and landing aircraft based on double loop and global Lipschitz stability. [PDF]

open access: yesPLoS ONE
Vertical Take-Off and Landing (VTOL) aircraft excel in their ability to maneuver in limited spaces, making them ideal for a variety of uses including urban air mobility, emergency response, and disaster surveillance.
Liang Du
doaj   +2 more sources

Wind tunnel tests of hovering propellers in the transition state of Quad-Plane [PDF]

open access: yesBulletin of the Polish Academy of Sciences: Technical Sciences, 2021
The following paper presents wind tunnel investigation of aerodynamic characteristics of hovering propellers. This propulsion system may be applied on a lightweight Quad Plane VTOL (Vertical Take-Off and Landing) UAV (Unmanned Aerial Vehicle).
Katarzyna Pobikrowska   +1 more
doaj   +1 more source

Smart mobility solutions in smart cities [PDF]

open access: yesInterdisciplinary Description of Complex Systems, 2022
A flying electric car in the smart city is a type of personal air vehicle that provides door-to-door transportation by both ground and air. In this article, we review the latest developments in flying cars. The autonomous flying car detects and evaluates
Gyula Mester
doaj   +1 more source

Design and manufacture of a UAV using additive technologies and composite materials [PDF]

open access: yesINCAS Bulletin, 2023
The aim of the study is the development of a VTOL (Vertical Takeoff and Landing) bicopter, utilizing Autodesk Inventor and Ultimaker Cura software. Design models were inspired by the V22-Osprey and Samson SA-2 from the Avatar movie.
Razvan Alexandru MIHAILESCU   +1 more
doaj   +1 more source

Design of the UAV aerodynamics in multiple stages [PDF]

open access: yesScientific Technical Review, 2020
This paper presents a methodology for aerodynamic optimization of UAV with VTOL capabilities. Aircrafts such as these usually fly at low speeds and due to that low Reynolds numbers are to be expected.
Popović Lazar S.   +5 more
doaj   +1 more source

Development and Trend Analysis of Vertical Takeoff and Landing Fixed Wing UAV

open access: yesHangkong gongcheng jinzhan, 2022
The vertical takeoff and landing(VTOL)fixed wing unmanned aerial vehicle(UAV)has many advantages,such as low requirements for takeoff and landing site,good maneuverability,high cruise speed and long endurance,etc.,which is a hot topic in the aviation ...
WANG Kelei   +7 more
doaj   +1 more source

Preliminary Design Method and Prototype Testing of a Novel Rotors Retractable Hybrid VTOL UAV

open access: yesIEEE Access, 2021
Conventional hybrid VTOL (Vertical Take-Off and Landing) aircraft are always designed by directly mounting multicopter rotors onto a fixed-wing plane. This type of VTOL aircraft may suffer from terrible drag due to the copter rotors.
Zijian Xiong   +4 more
doaj   +1 more source

Evaluation and Comparison of Hybrid Wing VTOL UAV with Four Different Electric Propulsion Systems

open access: yesAerospace, 2021
Electric propulsion technology has attracted much attention in the aviation industry at present. It has the advantages of environmental protection, safety, low noise, and high design freedom.
Jianan Zong   +4 more
doaj   +1 more source

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