Results 61 to 70 of about 274,934 (259)

Robust Reinforcement Learning Control Framework for a Quadrotor Unmanned Aerial Vehicle Using Critic Neural Network

open access: yesAdvanced Intelligent Systems, Volume 7, Issue 3, March 2025.
Quadrotor unmanned aerial vehicle control is critical to maintain flight safety and efficiency, especially when facing external disturbances and model uncertainties. This article presents a robust reinforcement learning control scheme to deal with these challenges.
Yu Cai   +3 more
wiley   +1 more source

Cities and Drones: What Cities Need to Know about Unmanned Aerial Vehicles (UAVs) [PDF]

open access: yes, 2016
NLC's municipal guide, Cities and Drones, is designed to serve as a primer on drones for local officials, providing insight into the recently released federal rules relating to drone operation, as well as offering suggestions for how local governments ...
Elias Stahl   +2 more
core  

Design Challenges to Expand the Functionality of Drones: Deformable Rotorcraft and Nature‐Inspired Flapping Drones

open access: yesAdvanced Intelligent Systems, EarlyView.
This review systematically analyzes deformable drones, including extendable, foldable, and tilting configurations, along with nature‐inspired flapping rotorcraft. By classifying deformation principles and structural mechanisms, design trade‐offs, functional capabilities, and future development potential are highlighted.
Ju‐Hee Lee   +9 more
wiley   +1 more source

The Nagorno-Karabah conflict – zero point of future conflicts?

open access: yesBulletin of "Carol I" National Defense University, 2023
The 44-day war between Armenia and Azerbaijan from September to November 2020 was the latest escalation of unresolved tensions in the Nagorno-Karabakh region.
Cătălin CHIRIAC
doaj   +1 more source

A Multisensor Remote Sensing Approach to Archaeological Prospection: Integrating UAV and Google Earth Data in the Bayan Gol Valley, Mongolia

open access: yesArchaeological Prospection, EarlyView.
ABSTRACT This study investigates the effectiveness of drone‐based remote sensing and Google Earth satellite imagery for archaeological prospection in the Bayan Gol Valley, Central Mongolia. Utilizing a fixed‐wing unmanned aerial vehicle (UAV) equipped with RGB and multispectral sensors, we surveyed 655 ha to document Mongol‐period settlement structures
Peter Heimermann   +4 more
wiley   +1 more source

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

open access: yes, 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

Advances in Triboelectric Nanogenerators With Rotating Structure

open access: yesCarbon Energy, EarlyView.
The rotating TENG has been widely studied for its superiorities of simple structure, high efficiency, and stable output. This review introduced the four different principles of rotating TENG and offered a thorough summary for performance and application research through three‐level classification. Importantly, the current existing problems, challenges,
Chuguo Zhang   +4 more
wiley   +1 more source

Adaptive Coherent/Non-Coherent Spatial Modulation Aided Unmanned Aircraft Systems

open access: yesIEEE wireless communications, 2019
UAVs are envisioned to be an important part of the device-centric IoT. These bespoke Unmanned Aircraft Systems (UASs) that support UAVs significantly differ from traditional terrestrial and aeronautical networks, both of which are evolving toward their ...
Chao Xu   +6 more
semanticscholar   +1 more source

UAS Albatros in activities for defence and security on sea waters

open access: yesHumanities and Social Sciences, 2019
Together with publishing, by the Armament Inspectorate of Ministry of National Defense, the tactical program UAS Albatros of short range, vertical take-off and landing, for the Navy, employees of the Polish Naval Academy (PNA) with the staff of the ...
Rafał Miętkiewicz
doaj   +1 more source

Fault detection, identification and accommodation techniques for unmanned airborne vehicles [PDF]

open access: yes, 2005
Unmanned Airborne Vehicles (UAV) are assuming prominent roles in both the commercial and military aerospace industries. The promise of reduced costs and reduced risk to human life is one of their major attractions, however these low-cost systems are yet ...
Cork, Lennon   +2 more
core   +1 more source

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