Results 51 to 60 of about 223,735 (247)

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

A Study on Effect Analysis of Trajectory-Based Arrival Management using Continuous Descent Operations

Journal of the Korean Society for Aviation and Aeronautics, 2022
Eunmi Oh, Dae-Hoon Jeon
semanticscholar   +1 more source

Pattern-Based Genetic Algorithm for Airborne Conflict Resolution [PDF]

NASA has developed the Autonomous Operations Planner (AOP) airborne decision support tool to explore advanced air traffic control concepts that include delegating separation authority to aircraft.
Karr, David A., Vivona, Robert A.
core   +1 more source

Multiple Unmanned Aerial Vehicle Formation Control through Deep Reinforcement Learning with Offline Sample Correction

Advanced Intelligent Systems, EarlyView.
Herein, a deep reinforcement learning‐based multi‐UAV formation control approach is proposed. By optimizing the utilization of historical data through correcting of offline samples, the past experience is better leveraged and learning performance is improved.
Zhongkai Chen, Han Zhou, Chao Yan, Yihao Sun, Xiaojia Xiang   +4 more
wiley   +1 more source

Composite impact vector control based on Apollo descent guidance

Chinese Journal of Aeronautics, 2021
K. S. Erer, Raziye Tekin, M. Özgören
semanticscholar   +1 more source

Skin‐Like Airflow Odometry for Micro Aerial Vehicles Based on Distributed Thermal Anemometers

Advanced Intelligent Systems, EarlyView.
A novel bioinspired skin‐like airflow odometry system for micro aerial vehicles employs distributed thermal anemometers to enable motion estimation in GNSS‐denied environments. Computational fluid dynamics simulation validates sensor deployment feasibility, while a transformer‐enhanced gated recurrent unit network extracts high‐precision airflow ...
Weicheng Di, Shihao Dang, Zheng Gong, Jiahui Zhang, Jinwu Xiang, Yonggang Jiang, Daochun Li, Zhan Tu   +7 more
wiley   +1 more source

High‐Entropy Engineering of O3‐Type Layered Cathodes for Long‐Cycle Life Sodium‐Ion Batteries

ChemistryEurope, EarlyView.
The disordered coordination environment in transition metals layer in high‐entropy oxides promotes the charge delocalization, enhancing the structural stability of the material and significantly improving its cycling stability. Sodium‐ion batteries (SIBs) are increasingly regarded as promising alternatives to lithium‐ion batteries (LIBs) due to their ...
Wendi Dong, Langyuan Wu, Qingshan Xie, Menglin Ke, Chaogen Hu, Xiaogang Zhang   +5 more
wiley   +1 more source

Large-scale wind-tunnel tests of descent performance of an airplane model with a tilt wing and differential propeller thrust [PDF]

Wind tunnel tests of wing stall, performance, and longitudinal stability & control of large model v/stol tilt wing transport ...
Deckert, W. H., Dickinson, S. O., Page, V. R.   +2 more
core   +1 more source

Study on damage and failure characteristics of loaded gas‐bearing rock–coal–rock combination structures

Deep Underground Science and Engineering, EarlyView.
The influence of gas on the instability and failure of rock–coal–rock combinations is considered. The damage characteristics of gas‐bearing rock–coal–rock combinations under different confining pressures, axial loading rates, and gas are revealed. A constitutive model for gas‐bearing rock–coal–rock damage considering gas is established.
Feng Du, Kai Wang, Wanyu Yang, Jiazhi Sun, Xiyang Fang, Yiyang Zhang, Longyong Shu, Liang Wang, Jiaxu Zhou   +8 more
wiley   +1 more source

Landing characteristics of an autogiro [PDF]

An investigation to determine the rate of descent, the horizontal velocity, and the attitude at contact of an autogiro in landings was made by the National Advisory Committee for Aeronautics at the request of the Bureau of Air Commerce, Department of ...
Peck, William C
core   +1 more source