Results 121 to 130 of about 1,141,804 (335)

Vehicle for civil helicopter ride quality research [PDF]

, 1975
A research aircraft for investigating the factors involved in civil helicopter operations was developed for NASA Langley Research Center. The aircraft is a reconfigured 17000 kg (36000 lb) military transport helicopter.
Schlegel, R. G., Snyder, W. J.
core   +1 more source

YOLOv3-Lite: A Lightweight Crack Detection Network for Aircraft Structure Based on Depthwise Separable Convolutions

Applied Sciences, 2019
Due to the high proportion of aircraft faults caused by cracks in aircraft structures, crack inspection in aircraft structures has long played an important role in the aviation industry.
Yadan Li, Zhenqi Han, Haoyu Xu, Lizhuang Liu, Xiaoqiang Li, Keke Zhang   +5 more
semanticscholar   +1 more source

Joint Situational Assessment‐Hierarchical Decision‐Making Framework for Maneuver Intent Decisions

Advanced Intelligent Systems, EarlyView.
This study introduces a new framework for decision‐making in unmanned combat aerial vehicles (UCAVs), integrating graph convolutional networks and hierarchical reinforcement learning (HRL). The method tackles adopts a curriculum‐based training approach guided by cross‐entropy rewards.
Ruihai Chen, Hao Li, Guanwei Yan, Haojie Peng, Qian Zhang   +4 more
wiley   +1 more source

On some aspects of the noise propagation from supersonic aircraft [PDF]

, 1953
The noise problem associated with an aircraft flying at supersonic speeds is shown to depend primarily on the shock wave pattern formed by the aircraft.
Busing, J. R., Lilley, G. M., Westley, R., Yates, A. H.   +3 more
core  

The potential for unmanned aerial vehicles (UAVs) to conduct marine fauna surveys in place of manned aircraft

, 2018
Unmanned aerial vehicles (UAVs) are increasingly used in marine wildlife research. As technological developments rapidly advance the versatility and functionality of affordable UAVs, their potential as a marine aerial survey tool is quickly gaining ...
A. Colefax, P. Butcher, B. Kelaher
semanticscholar   +1 more source

Multistable Composite Laminate Grids as a Design Tool for Soft Reconfigurable Multirotors

Advanced Intelligent Systems, EarlyView.
Flexible, lightweight, stable: the reconfigurable multirotor combines stable flight in multiple shapes with low‐energy reconfiguration. Utilizing optimized multistable composites, it achieves self‐locking in open and folded configurations, cutting width‐span by 48% and allowing for safe gap traversal.
Luca Girardi, Giada Risso, Laura Pesaresi, Paolo Ermanni, Stefano Mintchev   +4 more
wiley   +1 more source

Safety for non-microlight pilots [PDF]

, 1999
Microlight aircraft are some of the safest, cheapest and most fun aircraft flying in the UK. The fatal accident rate, at around 1 per 30,000 flying hours is similar to that of General Aviation overall, and rather better than some parts of it in recent ...
Gratton, GB
core  

Unmanned Aircraft Systems

Springer Handbook of Atmospheric Measurements, 2021
J. Bange, J. Reuder, A. Platis
semanticscholar   +1 more source

Commercial Aircraft Maintenance System Construction and Its Application in Defense Equipment Logistic Support Domain from Civil-military Integration Point of View

Hangkong gongcheng jinzhan, 2018
With the rapid development of science and technology, the complexity of national defense equipment is increasing. It is difficult to complete the security task reasonably and effectively by the military security capability.
Wang Ying, Ma Xiaojun
doaj   +1 more source

A Description of the Iceberg Aircraft Carrier and the Bearing of the Mechanical Properties of Frozen Wood Pulp Upon Some Problems of Glacier Flow [PDF]

, 1948
M. F. Perutz
openalex   +1 more source