Results 271 to 280 of about 1,618,021 (303)

Design and aerodynamic performance analysis of a variable-sweep-wing morphing waverider

Aerospace Science and Technology, 2020
The wide speed range and large flight envelope of the hypersonic vehicle require that its aerodynamic configuration still has good aerodynamic performance at low Mach number.
Pei Dai, B. Yan, Wei Huang, Yifei Zhen, Mingang Wang, Shuangxi Liu   +5 more
semanticscholar   +1 more source

Aerodynamic performance investigation on a morphing unmanned aerial vehicle with bio-inspired discrete wing structures

Aerospace Science and Technology, 2019
The excellent flight ability of birds is closely related not only to the morphing skeleton structure that can cause large-scale geometrical changes of their wings but also to the discrete or discontinuous wing structure composed of many feathers. In this
Zhe Hui, Yang Zhang, Gang Chen
semanticscholar   +1 more source

Global instability in the onset of transonic-wing buffet

Journal of Fluid Mechanics, 2019
Global stability analysis is used to analyse the onset of transonic buffet on infinite swept and unswept wings. This high-Reynolds-number flow is governed by the unsteady Reynolds averaged Navier–Stokes equations. The analysis generalizes earlier studies
J. Crouch, A. Garbaruk, M. Strelets
semanticscholar   +1 more source

Gain Scheduled Attitude Control of Fixed-Wing UAV With Automatic Controller Tuning

IEEE Transactions on Control Systems Technology, 2018
Fixed-wing unmanned aerial vehicles (UAVs) have become increasingly important in military, civil, and scientific sectors. Because of the existing nonlinearities, effective control this type of UAV remains a challenge. This paper proposes a gain scheduled
P. Poksawat, Liuping Wang, A. Mohamed
semanticscholar   +1 more source

Untethered flight of an insect-sized flapping-wing microscale aerial vehicle

Nature, 2019
N. Jafferis, N. Jafferis, E. Helbling, E. Helbling, Michael Karpelson, Robert J. Wood, Robert J. Wood   +6 more
semanticscholar   +1 more source

The Politics of Fear: What Right-Wing Populist Discourses Mean

, 2015
R. Wodak
semanticscholar   +1 more source

Ecological Morphology and Flight in Bats (Mammalia; Chiroptera): Wing Adaptations, Flight Performance, Foraging Strategy and Echolocation

, 1987
U. Norberg, J. Rayner
semanticscholar   +1 more source

Populist online practices: the function of the Internet in right-wing populism

, 2017
B. Krämer
semanticscholar   +1 more source

Right-Wing Authoritarianism

American Political Science Review, 1982
D. Ward
semanticscholar   +1 more source

How flight feathers stick together to form a continuous morphing wing

Science, 2020
Laura Y Matloff, Eric Chang, Teresa J Feo   +2 more
exaly