Results 21 to 30 of about 5,748 (245)

Mechanism and Kinematics for Flapping Wing Micro Air Vehicles Maneuvering Based on Bilateral Wings

open access: yesInternational Journal of Aerospace Engineering, 2022
With the development and application of a bionic flapping micro aircraft vehicle (FMAV), further requirements for its high maneuvering flight characteristics have been put forward. A controlling tail cannot meet the requirements of the maneuvering flight
Rui Zhang   +5 more
doaj   +1 more source

Analysis on Hover Control Performance of T- and Cross-Shaped Tail Fin of X-Wing Single-Bar Biplane Flapping Wing

open access: yesJournal of Robotics, 2020
The current flapping wing adopts T-shaped or cross-shaped tail fin to adjust its flight posture. However, how the tail fin will affect the hover control is not very clear.
Pingxia Zhang, Junru Zhu, Yongqiang Zhu
doaj   +1 more source

Modeling and Simulation Analysis of Bionic Flapping-Wing Flight Attitude Control Based on L1 Adaptive

open access: yesComplexity, 2023
Flapping-wing flight control is a multi-input and multi-output nonlinear system with uncertainties, which is affected by modeling errors, parameter variations, external disturbances, and unmodeled dynamics. Parameter uncertainty has a great impact on the
Lun Li   +4 more
doaj   +1 more source

Efficiency of lift production in flapping and gliding flight of swifts.

open access: yesPLoS ONE, 2014
Many flying animals use both flapping and gliding flight as part of their routine behaviour. These two kinematic patterns impose conflicting requirements on wing design for aerodynamic efficiency and, in the absence of extreme morphing, wings cannot be ...
Per Henningsson   +2 more
doaj   +1 more source

On flapping flight [PDF]

open access: yesProceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character, 1909
Abstract This paper is supplementary to one by the same author published in the 'Proceedings of the Royal Society' in 1899, "On Flapping Flight of Aeroplanes," communicated by the late Prof. George F. FitzGerald, F. R. S. Towards the end of that paper, the author refers to the subject of hovering, and points out that the method of his
openaire   +1 more source

Avian Wing Proportions and Flight Styles: First Step towards Predicting the Flight Modes of Mesozoic Birds [PDF]

open access: yes, 2011
We investigated the relationship between wing element proportions and flight mode in a dataset of living avian species to provide a framework for making basic estimates of the range of flight styles evolved by Mesozoic birds.
Wang Xia   +13 more
core   +1 more source

Research progress on the energy consumption of bionic flapping-wing aerial vehicles

open access: yes工程科学学报, 2022
Natural flyers use muscles, bones, and other structures in coordination to attain agile and nimble flight performance. They can fly in various complex environments through different flight modes, such as flapping, hovering, and gliding.
Min ZHAO   +4 more
doaj   +1 more source

Electrocardiogram recordings in free-ranging gannets reveal minimum difference in heart rate during flapping versus gliding flight [PDF]

open access: yes, 2006
Gliding flight is one of the major features that allows flying animals to cover extensive distances while minimising their energy expenditures. This has been supported by studies recording heart rate as a proxy for energy expended, but the exact amount ...
Ryan, Peter G.   +11 more
core   +1 more source

Unsteady aerodynamic characteristics of a bionic flapping wing in three-dimensional composite motion

open access: yesAIP Advances, 2022
Owing to continual advances in computational fluid dynamics, simulations of fluids have emerged as an important means of analyzing the aerodynamic characteristics of flapping-wing flight.
Lun Li   +5 more
doaj   +1 more source

Untethered Flight of an Insect-Sized Flapping-Wing Microscale Aerial Vehicle

open access: yes, 2023
Please let me know if there is anything else that you need from me to expedite this. Thank you for your time and attention. Regards, Noah JafferisHeavier-than-air flight at any scale is energetically expensive. This is greatly exacerbated at small
Helbling, Elizabeth   +3 more
core   +1 more source

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