Results 31 to 40 of about 61,151 (216)

Application of analytical redundancy of measurements to increase the reliability of aircraft attitude control

Aviation, 2022
This article presents basic methodology and some algorithms for estimating attitude and heading angles of an unmanned or optionally piloted aircraft in the event of a partial failure of the on-board measurement systems.
Kamil Kosacki, Andrzej Tomczyk
doaj   +1 more source

Chance-constrained optimal power flow for improving line flow and voltage security of power transmission networks

Autonomous Intelligent Systems
With the growing penetration of renewable energy, the impact of renewable uncertainties on power system secure operation is of increasing concern. Based on a recently developed linear power flow model, we formulate a chance-constrained optimal power flow
Yaodan Cui, Yue Song, Kairui Feng, Haonan Xu, Qinyu Wei, Kaiyu Li   +5 more
doaj   +1 more source

A Review of Detect and Avoid Standards for Unmanned Aircraft Systems

Aerospace
When operating an unmanned aircraft system within the specific category beyond Air Risk Class a or within the certified category, a detect and avoid system is required in order to mitigate the risk of colliding with manned aircraft.
Marcel Riedel
doaj   +1 more source

Analysis of unmanned aircraft systems application in the civil field

Transport, 2012
The basic directions of unmanned aircraft systems applications in the civil field has been reviewed, the concepts of creation and organization of civil unmanned aircraft systems has been considered depending on the task orientation as well as the wide ...
Volodymyr Kharchenko, Dmitry Prusov
doaj   +1 more source

The Hidden Human Factors in Unmanned Aerial Vehicles [PDF]

, 2008
In April 2006, an Unmanned Aerial Vehicle crashed near Nogales, Arizona. This incident is of interest because it triggered one of the most sustained studies into the causes of failure involving such a vehicle.
Johnson, C.W.
core  

Study of Free‐Space Optical Quantum Network: Review and Prospectives

Advanced Science, EarlyView.
Free from the constraints of fiber connections, free‐space quantum network enables longer and more flexible quantum network connections. This review summarizes and comparatively analyzes free‐space quantum network experiments based on ground stations, satellites, and mobile platforms.
Hua‐Ying Liu, Zhenda Xie, Shining Zhu
wiley   +1 more source

Seeing the Threat: Pilot Visual Detection of Small Unmanned Aircraft Systems in Visual Meteorological Conditions

International Journal of Aviation, Aeronautics, and Aerospace, 2016
One key challenge of integrating Unmanned Aircraft Systems (UAS) platforms into the National Airspace System (NAS) is the potential for midair collisions between manned aircraft and the unmanned system. The lack of an established UAS benchmark for Detect,
Jon M. Loffi, Ryan J Wallace, Jamey D. Jacob, Jared C. Dunlap   +3 more
doaj   +1 more source

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

Advanced 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, Yefeng Yang, Tao Huang, Boyang Li   +3 more
wiley   +1 more source

Study on A-Star Algorithm-Based 3D Path Optimization Method Considering Density of Obstacles

Aerospace
Collision avoidance and path planning are essential for ensuring safe and efficient UAV operations, particularly in applications like drone delivery and Advanced Air Mobility (AAM).
Yong-Deok Yoo, Jung-Ho Moon
doaj   +1 more source

The Concept of Autonomy and the Changing Character of War

Oslo Law Review, 2018
There has been an immense development in unmanned aircraft technology in the past three decades or so. The percentage of unmanned versus manned aircraft in combat operations is only predicted to grow in the future.
John O Birkeland
doaj   +1 more source