Results 31 to 40 of about 62,052 (226)

Collision‐Resilient Winged Drones Enabled by Tensegrity Structures

Advanced Robotics Research, EarlyView.
Based on structures of birds such as the woodpeck, this article presents the collision‐resilient aerial robot, SWIFT. SWIFT leverages tensegrity structures in the fuselage and wings which allow it to undergo large deformations in a crash, without sustaining damage. Experiments show that SWIFT can reduce impact forces by 70% over conventional structures.
Omar Aloui, Raphael Zufferey, William Stewart, Mohammad Askari, Simon Jeger, Dario Floreano   +5 more
wiley   +1 more source

A Survey of Air-to-Ground Propagation Channel Modeling for Unmanned Aerial Vehicles

, 2018
In recent years, there has been a dramatic increase in the use of unmanned aerial vehicles (UAVs), particularly for small UAVs, due to their affordable prices, ease of availability, and ease of operability.
Aboudebra A., Ahmed N., Alzenad Mohamed, Alzenad Mohamed, Al‐Hourani A., Amorim R., Amorim R., Asadpour M., Athukoralage Dasun, Azari M. M., Bandoim Lana, Blandino Steve, Bluemm Christian, Bohagen Frode, Bor‐Yaliniz R Irem, Cai X., Chandhar P., Chen J., Chen J., Cheng Chen‐Mou, Cheng Xiang, Child JR, Daniel Kai, David Blom John, Desjardins Jeff, Essaadali R., Feng Qixing, Gao Xijun, Gates B. G., George Pierce Jones IV, Goddemeier N., Goddemeier Niklas, Gulfam S. M., Gulfam S. M., Hemanth Kumar Zhiqiang Wu, Ibrahim M., Jackson B. R. P., Jamal Hosseinali, Jiang F., Johnsson J., Joo Park Pyung, Kalantari E., Kaul S., Kawamata F., Kerczewski Bob, Khawaja W., Khawaja Wahab, Khawaja Wahab, Khawaja Wahab, Kovacs I., Ksendzov Alexander, Kung H. T., Kunisch J., Kvicera Milan, Lamiano D. F., Lemos Cid E., Levis Curt, Lin X., Lyu J., Malik W. Q., Matolak D. W., Matolak D. W., Matolak D. W., Matolak D. W., Matolak D. W., Matolak D. W., Matolak D. W., Matolak David W, Matolak David W., Matolak David W., Matolak David W., Newhall W. G., Ono F., Paier A., Pavel Pechac Michal Simunek, Rappaport T. S., Ravi V. V. C., Rieth D., Romeu J., Ruddle A. R., Schneckenburger N., Sharp C. S., Shim D. H., Song Meng Yu, Sun R., Sun Ruoyu, Sun Ruoyu, Takizawa K., Tavares T., Teng E., Tu H. D., Vahidi Vahid, Walter Michael, Wentz Michael, White F., Wu Y., Yang J., Yanmaz Evşen, Yanmaz Evşen, Zelenỳ Jan, Zhang Chao, Zheng Yi   +101 more
core   +1 more source

A CFD based procedure for airspace integration of small unmanned aircraft within congested areas [PDF]

, 2017
Future integration of small unmanned aircraft within an urban airspace requires an a posteriori understanding of the building-induced aerodynamics which could negatively impact on vehicle performance.
Anderson, David, Murray, Craig W.A.
core   +1 more source

Unmanned Aircraft Systems: A Latin American Review and Analysis from the Colombian Context

Applied Sciences, 2023
The usage of unmanned aircraft systems to complete routine, commercial, and industrial tasks has increased throughout the world, evidencing better profitability and reducing risks for operators.
Gabriel J. Sánchez-Zuluaga, Luisa Isaza-Giraldo, Germán Darío Zapata-Madrigal, Rodolfo García-Sierra, John E. Candelo-Becerra   +4 more
doaj   +1 more source

A Degradable Bioinspired Flier with Aerogel‐Based Colorimetric Sensors for Environmental Monitoring

Advanced Science, EarlyView.
Biodegradable fliers are developed inspired by Tipuana tipu samaras, integrating cellulose nanocrystal aerogel (CNCa) sensors loaded with natural dyes for pH and ammonia detection. The lightweight, degradable fliers mimic natural morphology and aerodynamics, offering an eco‐friendly, scalable solution for in situ environmental monitoring after passive ...
Gianpaolo Gallo, Ruowen Tu, Carlo Filippeschi, Stefano Mariani, Barbara Mazzolai   +4 more
wiley   +1 more source

Analysis of the Hybrid Power System for High-Altitude Unmanned Aircraft

Advances in Materials Science and Engineering, 2015
The application of single solar array on high-altitude unmanned aircraft will waste energy because of its low conversion efficiency. Furthermore, since its energy utilization is limited, the surface temperature of solar array will rise to 70°C due to the
Kangwen Sun, Ming Zhu, Lifeng Wang, Hu Liu   +3 more
doaj   +1 more source

The Future of Hydrogen‐Powered Aviation: Technologies, Challenges, and a Strategic Roadmap for Sustainable Decarbonization

Advanced Energy and Sustainability Research, EarlyView.
Hydrogen‐powered aviation offers a transformative pathway to zero‐emission flight by eliminating in‐flight CO2 emissions. Key considerations include propulsion systems (fuel cells and hydrogen combustion), cryogenic storage and insulation challenges, infrastructure and cost barriers, and supply‐chain constraints.
Mubasshira, Md Mahbubur Rahman, Karib Hassan Khan, Md Nizam Uddin, Dewan Hafiz Nabil   +4 more
wiley   +1 more source

Image fusion algorithm for the collaborative use of unmanned aerial vehicles

Научный вестник МГТУ ГА
Currently, the applicable scope of unmanned aircraft application is increasingly expanding. The promising field of unmanned aircraft enhancement is the implementation of some collaborative actions during controlled flight.
N. V. Levshonkov, I. M. Nafikоv, Y. V. Laryukhina   +2 more
doaj   +1 more source

Design and simulation of GPS assisted smart antenna for Unmanned Aerial Vehicle (UAV)

ACI Avances en Ciencias e Ingenierías, 2013
A critical component of an Unmanned Aerial Vehicle (UAV) is the communications system. It is in charge of transmitting information from the aircraft to the base station and sending configurations to the aircraft.
Francisco Cuesta, René P. Játiva E.
doaj   +1 more source

UNMANNED AERIAL VEHICLE AS A DEVICE SUPPORTING THE PHYSICAL PROTECTION SYSTEM OF CRITICAL INFRASTRUCTURE FACILITIES: NUCLEAR POWER PLANT AS A CASE IN POINT [PDF]

Scientific Journal of Silesian University of Technology. Series Transport, 2020
The purpose of this work is to demonstrate the advantages and disadvantages of unmanned aerial vehicles as devices supporting the system of physical protection of critical infrastructure facilities using the example of a nuclear power plant.
Jędrzej ŁUKASIEWICZ
doaj   +1 more source