Results 61 to 70 of about 51,343 (304)

Research on the aerodynamic characteristics of eVTOL aircraft ducted rotor tip embedded inside the ducted body

Scientific Reports
The lift system constitutes a pivotal technology in the makeup of vertical takeoff and landing aircraft systems. The application of ducted rotors in urban air mobility(UAM) has advantages and is one of the future development trends.
Siliang Du, Yi Zha, Chong Li, Zhiming Lu, Qijun Zhao   +4 more
doaj   +1 more source

Research on Lithium Battery Health State Prediction Model Based on Multimodal Signal Decomposition and Uncertainty Quantification Technology

Journal of Applied Science and Engineering
Precise estimation of lithium-ion battery State of Health (SOH) is essential for the safe and efficient operation of energy systems and electronic devices.
Jiangjiang Li, Lijuan Feng, Junyan Zhao, Jingfen Li   +3 more
doaj   +1 more source

Metasurface‐Enabled Active‐Like Passive Radar

Advanced Science, EarlyView.
A programmable space‐time‐coding metasurface embeds distinct spatiotemporal tags into ambient wireless signals, allowing passive radar to operate in an active‐like manner. By enabling code‐correlated reconstruction under interference, the approach supports robust real‐time UAV tracking in complex environments and points to intelligent, low‐power ...
Mingyi Li, Jiawen Xu, Hanting Zhao, Xu Zhao, Yanjin Chen, Tie Jun Cui, Vincenzo Galdi, Lianlin Li   +7 more
wiley   +1 more source

Public Perception of Unmanned Aerial Vehicles [PDF]

, 2011
This study explored public risk perception of unmanned aerial vehicles (UAV) for civilian commercial operations, including cargo and passenger transportation.
Tam, Alice
core   +1 more source

Development of a novel platform for greater situational awareness in the urban military terrain [PDF]

, 2009
The conflicts in Afghanistan and Iraq and the more recent war in the Gaza Strip have emphasized the need for novel platforms which provide for greater situational awareness in the urban terrain.
Mehmet Ali Erbil, Prior, Stephen D., Odedra, Siddharth, White, Anthony S., Siddharth Odedra, Erbil, Mehmet Ali, Shen, Siu-Tsen, Tom Foran, Mehmet Karamanoglu, Anthony S. White, Foran, Tom, Stephen D. Prior, Karamanoglu, Mehmet, Siu-Tsen Shen   +13 more
core   +1 more source

Autonomous Antidisturbance Flight Control of Tilt-Rotor UAV in Complex Environment of Ultralow Altitude

International Journal of Aerospace Engineering
In our work, an algorithm is presented for tilt-rotor UAV clusters in an unknown complex environment, which addresses the challenge of navigating and positioning in complex unknown environments without external navigation and positioning information.
Liben Yang, Yu Li, Jianwen Tian, Dong Wang   +3 more
doaj   +1 more source

Underground unmanned aerial vehicles cluster system for monitoring and its key technologies

Gong-kuang zidonghua, 2019
Underground monitoring and control system is usually fixed and has limited range, so it is difficult to fully meet dynamic monitoring requirements of underground safety production.
YANG Wei, SHAN Chunyan, LIU Junbo
doaj   +1 more source

A High‐Resolution Self‐Powered Angular Displacement Sensor Based on Triboelectric Nanogenerator With Time‐Grating

Advanced Science, EarlyView.
A self‐powered phase‐encoding sensing paradigm enables direct motion‐to‐time information conversion, providing a compact and autonomous strategy for high resolution angular displacement measurement. ABSTRACT In modern manufacturing and engineering, angular displacement sensors are crucial for motion control and feedback systems in Electromechanical ...
Shuxian Wang, Donghang An, Shiyou Liu, Zhiyi Wu   +3 more
wiley   +1 more source

Autonomous Collision avoidance for Unmanned aerial systems [PDF]

, 2014
Unmanned Aerial System (UAS) applications are growing day by day and this will lead Unmanned Aerial Vehicle (UAV) in the close future to share the same airspace of manned aircraft.This implies the need for UAS to define precise safety standards ...
Melega, Marco
core  

Three-dimensional formation flying using bifurcating potential fields [PDF]

, 2009
This paper describes the design of a three-dimensional formation flying guidance and control algorithm for a swarm of autonomous Unmanned Aerial Vehicles (UAVs), using the new approach of bifurcating artificial potential fields.
Uchiyama, Kenji, Colin MacInnes, Masayuki Suzuki, Bennet, Derek J., Kenji Uchiyama, Derek Bennet, Suzuki, Masayuki, McInnes, Colin R., McInnes, C.R.   +8 more
core   +1 more source