Results 31 to 40 of about 207,288 (348)

A hybrid thrusting system for increasing the endurance time of multirotor unmanned aerial vehicles

open access: yesInternational Journal of Advanced Robotic Systems, 2023
One of the most significant disadvantages of electric multirotor unmanned aerial vehicles is their short flight time compared to fuel-powered unmanned aerial vehicles. This is mainly due to the low energy density of electric batteries. Fuel has much more
Jawad Bdour, Belal H Sababha
doaj   +1 more source

Modeling of an unmanned hybrid aerial vehicle

open access: yes2014 IEEE Conference on Control Applications (CCA), 2014
In this paper, the mathematical modeling of ahybrid aerial vehicle is presented. This vehicle is a combinationof a fixed-wing aircraft and a multirotor helicopter. Thisvehicle is thus capable of vertical take off and landing (VTOL)and of cruising forward flight.
Ducard, Guillaume, Hua, Minh Duc
openaire   +2 more sources

Recent Advances in Unmanned Aerial Vehicles: A Review

open access: yesThe Arabian journal for science and engineering, 2022
In recent decades, aerial robots especially small UAVs and drones have witnessed tremendous improvements in terms of their structure, working methodology, flying features and navigation control.
Faiyaz Ahmed   +3 more
semanticscholar   +1 more source

A miniaturized CPW fed tri-band antenna based on metamaterial resonance [PDF]

open access: yesAIP Advances
A miniaturized metamaterial-based tri-band antenna is proposed, which achieves multi-band coverage and performance enhancement through innovative structural design.
Mingxin Liu   +4 more
doaj   +1 more source

Distributed sensing units deploying on group unmanned vehicles

open access: yesInternational Journal of Distributed Sensor Networks, 2021
This study aims to use two unmanned vehicles (aerial vehicles and ground vehicles) to implement multi-machine cooperation to complete the assigned tasks quickly.
Bao Rong Chang   +3 more
doaj   +1 more source

Distributed Robust Formation Tracking Control for Quadrotor UAVs with Unknown Parameters and Uncertain Disturbances

open access: yesAerospace, 2023
In this paper, the distributed formation tracking control problem of quadrotor unmanned aerial vehicles is considered. Adaptive backstepping inherently accommodates model uncertainties and external disturbances, making it a robust choice for the dynamic ...
Linxing Xu, Yang Li
doaj   +1 more source

Unmanned Aerial Vehicles in Smart Agriculture: Applications, Requirements, and Challenges [PDF]

open access: yesIEEE Sensors Journal, 2020
In the next few years, smart farming will reach each and every nook of the world. The prospects of using unmanned aerial vehicles (UAV) for smart farming are immense.
Praveen Kumar Reddy Maddikunta   +6 more
semanticscholar   +1 more source

Urban Traffic Monitoring and Analysis Using Unmanned Aerial Vehicles (UAVs): A Systematic Literature Review

open access: yesRemote Sensing, 2022
Unmanned aerial vehicles (UAVs) are gaining considerable interest in transportation engineering in order to monitor and analyze traffic. This systematic review surveys the scientific contributions in the application of UAVs for civil engineering ...
E. Butilă, R. Boboc
semanticscholar   +1 more source

Cybersecurity in Unmanned Aerial Vehicles: a Review

open access: yesInternational Journal on Smart Sensing and Intelligent Systems, 2023
Context With the rapid advancement of unmanned aerial vehicle (UAV) technology, ensuring these autonomous systems’ security and integrity is paramount. UAVs are susceptible to cyberattacks, including unauthorized access, control, or manipulation of their
Wasswa Shafik   +2 more
semanticscholar   +1 more source

The impact of the joint use of false aircraft targets in a group of combat unmanned aerial vehicles on the results of destruction

open access: yesРадіоелектронні і комп'ютерні системи, 2022
The subject of the paper is the process of joint use of false aircraft targets as part of a group of combat unmanned aerial vehicles to perform tasks to destroy enemy targets. The current paper determines the optimal number of false aircraft targets in a
Volodymyr Prymirenko   +4 more
doaj   +1 more source

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