Results 61 to 70 of about 314,370 (260)
Empirical measurements of small unmanned aerial vehicle co-axial rotor systems
, 2011 Small unmanned aerial vehicles (SUAV) are beginning to dominate the area of intelligence, surveillance, target acquisition and reconnaissance (ISTAR) in forward operating battlefield scenarios.
Prior, Stephen D., Bell, Jonathon
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Power curve and wake analyses of the Vestas multi-rotor demonstrator [PDF]
Wind Energy Science, 2019 Numerical simulations of the Vestas multi-rotor demonstrator (4R-V29) are compared with field measurements of power performance and remote sensing measurements of the wake deficit from a short-range WindScanner lidar system.
M. P. van der Laan +11 more
doaj +1 more source
Advanced Materials, EarlyView.Stacked nanoflake assembly (SNA) membranes can oscillate autonomously, offering opportunities for soft actuation and energy harvesting. This work uncovers the physical mechanism behind the sustained oscillation of SNA membranes in gradient humidity and identifies three governing dimensionless parameters, enabling rational design for optimizing SNA ...
Zijing Zhang +5 more
wiley +1 more source
AIP Advances, 2022 We present a twin-propelled wall-climbing robot that can stably adsorb and move quickly on a vertical wall by exploiting the propeller’s reverse thrust as the adsorption force and the wheel as the movement method.
Peng Liang +4 more
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Advanced Materials Technologies, EarlyView.High‐aspect‐ratio low‐melting‐point alloy inclusions are embedded within multilayer silicone laminates to create thermally programmable stiffness. Sequential activation of alloy‐rich layers produces four distinct mechanical states and reconfigures tendon‐driven actuator trajectories under the same load.
Palpolage Don Shehan Hiroshan Gunawardane +4 more
wiley +1 more source
Ground effect on a rotor wake. [PDF]
, 1985 The effect of the ground on a rotor wake in forward flight has been investigated experimentally in the working section of an 8ft x Oft straight-through wind tunnel.
Kusmarwanto, I.
core +4 more sources
Geometric Sensitivity and Performance–Flow Field Coupling in Coaxial and Staggered Rotor Systems
International Journal of Aerospace EngineeringMultirotor aerodynamic interference exerts a remarkable influence on the aerodynamic characteristics of distributed rotorcraft. It triggers complex flow structures and performance changes, whereas the inherent relationship between flow field ...
He Zhu +5 more
doaj +1 more source
Авіаційно-космічна техніка та технологія, 2018 Interacting between the next rows of the turbine creates a circumferential flow non-uniformity, which leads to origination of resonance dynamic stresses on rotor bladings with frequencies z·fn, where fn - a rotor rotation frequency, z - number of stator ...
Юрий Петрович Кухтин +2 more
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Kicked-rotor quantum resonances in position space: application to situations of experimental interest [PDF]
The European Physical Journal D, 2011 In this work we apply the formalism developed in [M. Lepers \emph{et al}., Phys. Rev. A \textbf{77}, 043628 (2008)] to different initial conditions corresponding to systems usually met in real-life experiments, and calculate the observable quantities that can be used to characterize the dynamics of the system.
Lepers, Maxence +2 more
openaire +2 more sources
Advanced Materials Technologies, EarlyView.A liquid metal‐based strain‐sensing architecture to measure the deformation of a circular diaphragm against obstructed surfaces is formulated using finite element modeling and confocal imaging to establish the mechanical framework and is utilized to control diaphragm‐induced confinement on a bead array, as validated by biomolecular loading level ...
Abdullah‐Bin Siddique +4 more
wiley +1 more source