Results 21 to 30 of about 27,517 (135)

Conceptual Research on a Mono-Biplane Aerodynamics-Driven Morphing Aircraft

open access: yesAerospace, 2022
The operation of aircrafts with high aspect ratio wings is usually vulnerable to low-standard airports and bad weather. A new concept for a mono-biplane aerodynamics-driven morphing aircraft is proposed.
Tingyu Guo   +4 more
doaj   +1 more source

The Functions of Phasic Wing-Tip Folding on Flapping-Wing Aerodynamics

open access: yesBiomimetics
Insects produce a variety of highly acrobatic maneuvers in flight owing to their ability to achieve various wing-stroke trajectories. Among them, beetles can quickly change their flight velocities and make agile turns.
Yiming Li   +4 more
doaj   +1 more source

Analysis of Morphing Modes of Hypersonic Morphing Aircraft and Multiobjective Trajectory Optimization

open access: yesIEEE Access, 2019
Aiming at improving the range of wing-body combination aircraft at hypersonic flow conditions and exploring the application of morphing technology in hypersonic aircraft, morphing aircrafts with different morphing modes have been proposed.
Wuyu Peng   +3 more
doaj   +1 more source

The Control Efficiency Analysis of Asymmetry Transmutation forFolding Wing Morphing Aircraft

open access: yesHangkong gongcheng jinzhan, 2018
Folding wing morphing aircraft can alter their shape largely which causes the aerodynamic parameters change significantly. A control scheme that using asymmetric morphing as a control input is proposed in this paper to investigate the control efficiency ...
Xu Xiaowu, Zhang Wei, Zhan Hao
doaj   +1 more source

Face morphing attacks and face image quality: The effect of morphing and the unsupervised attack detection by quality

open access: yesIET Biometrics, 2022
Morphing attacks are a form of presentation attacks that gathered increasing attention in recent years. A morphed image can be successfully verified to multiple identities.
Biying Fu, Naser Damer
doaj   +1 more source

Comparative Aerodynamic Performance Analysis of Camber Morphing and Conventional Airfoils

open access: yesApplied Sciences, 2021
This paper aims to numerically validate the aerodynamic performance and benefits of variable camber rate morphing wings, by comparing them to conventional ones with plain flaps, when deflection angles vary, assessing their D reduction or L/D improvement.
Tuba Majid, Bruce W. Jo
doaj   +1 more source

A compliant metastructure design with reconfigurability up to six degrees of freedom

open access: yesNature Communications
Compliant mechanisms with reconfigurable degrees of freedom are gaining attention in the development of kinesthetic haptic devices, robotic systems, and mechanical metamaterials.
Humphrey Yang   +8 more
doaj   +1 more source

Graph Matching for Underwater Simultaneous Localization and Mapping Using Multibeam Sonar Imaging

open access: yesJournal of Marine Science and Engineering
This paper addresses the challenges of underwater Simultaneous Localization and Mapping (SLAM) using multibeam sonar imaging. The widely used Iterative Closest Point (ICP) often falls into local optima due to non-convexity and the lack of features for ...
Lingfei Zhuang   +3 more
doaj   +1 more source

Span morphing using the compliant spar [PDF]

open access: yes, 2014
This paper develops and models the Compliant Spar concept that allows the wing span to be varied to provide roll control and enhance the operational performance for a medium altitude long endurance (MALE) UAV.
Ajaj, R.M.   +3 more
core   +1 more source

Comparison of Aerodynamic Characteristics of Morphing and Conventional Wings [PDF]

open access: yesINCAS Bulletin
The present research investigates the advantages of a morphing versus a hinged flap. The morphing wing model is equipped with a morphing trailing edge, while the conventional wing has a hinged flap system.
Mir Hossein NEGAHBAN   +1 more
doaj   +1 more source

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