Results 51 to 60 of about 27,059 (135)

Conceptualization of a Small, Uncrewed, Microwave-Powered Aircraft

International Journal of Aerospace Engineering
This work conceptualizes wireless power transfer (WPT) between a tracking stationary ground transmitter and a mobile aircraft. Initial ground tests are performed to determine the viability of the Friis equation, using rectennas developed for operation at
Sameep Jagtap, Maya Rahaman-Noronha, William D. Kemp, Marco A. Antoniades, Goetz Bramesfeld   +4 more
doaj   +1 more source

A framework of variable-length sequence data preprocessing based on semantic perception

Xibei Gongye Daxue Xuebao
Deep learning frameworks generally adopt padding or truncation operations toward variable-length sequences in order to use efficient yet intensive batch training. However, padding leads to intensive memory consumption, and truncation inevitably loses the
WANG Xiaodong, WANG Jiwei, ZHONG Zhihao, YANG Huan, YAO Hongjing, GUO Yangming   +5 more
doaj   +1 more source

Multiperspective Structural Integrity Investigations on the Rotor Blade of Axial Flow Compressor Under Various Rotodynamic Loading Conditions Using Enhanced Computational Analyses

International Journal of Aerospace Engineering
Small gas turbine (SGT) engines power the latest generation of unmanned aerial vehicles (UAVs). This study investigates the axial flow–natured rotor blades of an SGT compressor. Rotor structures in axial flow compressors have failed due to complex stress
Sandhiya Chandrakumar, Shyam Sundar Jayakumar, Beena Stanislaus Arputharaj, Parvathy Rajendran, Arul Prakash Raji, Arunkumar Karuppasamy, Darshan Kumar Jayaram, Arun Bhuvendran, Senthil Kumar Madasamy, Vijayanandh Raja   +9 more
doaj   +1 more source

Multi-spectral fusion power equipment fault recognition based on prompt learning

Xibei Gongye Daxue Xuebao
To address the issue of weak fault recognition ability of power equipment in single-spectrum images, a multi-spectral fusion recognition method based on prompt learning is proposed.
YAO Yiyang, DU Zexing, ZHOU Guoqing, WANG Qing   +3 more
doaj   +1 more source

Long-Duration UAV Localization Across Day and Night by Fusing Dual-Vision Geo-Registration with Inertial Measurements

Drones
Remote sensing visual-light spectral (VIS) maps provide stable and rich features for geo-localization. However, it still remains a challenge to make use of VIS map features as localization references at night.
Xuehui Xing, Xiaofeng He, Ke Liu, Zhizhong Chen, Guofeng Song, Qikai Hao, Lilian Zhang, Jun Mao   +7 more
doaj   +1 more source

Experimental Investigation of Aerodynamic Interaction in Non-Parallel Tandem Dual-Rotor Systems for Tiltrotor UAV

Drones
The distributed electric tilt-rotor Unmanned Aerial Vehicle (UAV) combines the vertical take-off and landing (VTOL) capability of helicopters with the high-speed cruise performance of fixed-wing aircraft, offering a transformative solution for Urban Air ...
He Zhu, Yuhao Du, Hong Nie, Zhiyang Xin, Xi Geng   +4 more
doaj   +1 more source

Empowering Smallholder Farmers with UAV-Based Early Cotton Disease Detection Using AI

Drones
Early detection of cotton diseases is critical for safeguarding crop yield and minimizing agrochemical usage. However, most state-of-the-art systems rely on multispectral or hyperspectral sensors, which are costly and inaccessible to smallholder farmers.
Halimjon Khujamatov, Shakhnoza Muksimova, Mirjamol Abdullaev, Jinsoo Cho, Cheolwon Lee, Heung-Seok Jeon   +5 more
doaj   +1 more source

Design of Optoelectronic Tracking Platform Driven by Ultrasonic Motor with a Novel Limiter. [PDF]

Micromachines (Basel), 2023
Liang Y, Pan S, Chen L.
europepmc   +1 more source

Collision Detection and Recovery Control of Drones Using Onboard Inertial Measurement Unit

Drones
This paper presents a strategy for collision detection and recovery control of drones using an onboard Inertial Measurement Unit (IMU). The collision detection algorithm compares the expected response of the drone with the measurements from the IMU to ...
Xisheng Huang, Guangjun Liu, Yugang Liu
doaj   +1 more source

Investigation of Heat and Drag Reduction Induced by Forward-Facing Cavity in Hypersonic Flow

Aerospace
The design of heat and drag reduction systems for hypersonic vehicles has garnered widespread global attention. In this study, the Navier–Stokes equations and the SST k-ω turbulence model are employed to establish a simulation model for heat and drag ...
Ning Ding, Jianlong Chang, Junhui Liu
doaj   +1 more source