Waveguide Photoactuators: Materials, Fabrication, and Applications
Advanced Robotics Research, EarlyView.Waveguide photoactuators convert guided light into mechanical motion. Their tethered‐flexible design enables minimally invasive surgery and confined‐space robotics. This review aims to guide materials selection, device design, and system integration, accelerating the transition of waveguide photoactuators from laboratory prototypes to versatile ...
Minjie Xi +4 more
wiley +1 more source
Establishment and Verification of the UAV Coupled Rotor Airflow Backward Tilt Angle Controller
DronesAt present, all the flight controllers of agricultural UAVs cannot accurately and quickly control the influencing factors of the UAV coupled rotor airflow backward tilt angle during the application process.
Han Wu +9 more
doaj +1 more source
A Dynamic RCS and Noise Prediction and Reduction Method of Coaxial Tilt-Rotor Aircraft Based on Phase Modulation. [PDF]
Sensors (Basel), 2022 Wang Z, Huang J, Yi M, Lu S.
europepmc +1 more source
Computational fluid dynamics model of a quad-rotor helicopter for dynamic analysis [PDF]
, 2016 The control and performance of a quad-rotor helicopter UAV is greatly influenced by its aerodynamics, which in turn is affected by the interactions with features in its remote environment. This paper presents details of Computational Fluid Dynamics (CFD)
Bousbaine, Amar +2 more
core +2 more sources
Study of a Flexible UAV Proprotor [PDF]
, 2013 This paper is concerned with the evaluation of design techniques, both for the propulsive performance and for the structural behavior of a composite flexible proprotor.
Bénard, Emmanuel +5 more
core +2 more sources
Sleep Alters the Velocity of Physiological Brain Pulsations in Humans
Advanced Science, EarlyView.Sleep alters I/CSF oscillatory flow, driven by increased respiratory (29%) and vasomotor pulsation (21%) velocities, while cardiovascular pulsations decreased by (22%). Velocity is quantified using optical flow analysis of MREG data. Spectral power increases alongside these pulsations (spatial correlation, r = 0.35 and r = 0.39, respectively ...
Ahmed Elabasy +13 more
wiley +1 more source
IEEE AccessThis study addresses the challenge of excessive downwash generated by uncrewed aerial vehicles (UAVs) during pinpoint weeding in agriculture. We propose a novel UAV design incorporating adaptive rotors that can tilt during flight to reduce the downward ...
Kenki Miyahara +3 more
doaj +1 more source
Design, Analysis, and Testing of a Hybrid VTOL Tilt-Rotor UAV for Increased Endurance. [PDF]
Sensors (Basel), 2021 Panigrahi S, Krishna YSS, Thondiyath A.
europepmc +1 more source
Empirical Modeling of Tilt-Rotor Aerodynamic Performance
, 2021 There has been increasing interest into the performance of electric vertical takeoff and landing (eVTOL) aircraft. The propellers used for the eVTOL propulsion systems experience a broad range of aerodynamic conditions, not typically experienced by propellers in forward flight, that includes large incidence angles relative to the oncoming airflow ...
openaire +2 more sources
Hover performance tests of baseline metal and Advanced Technology Blade (ATB) rotor systems for the XV-15 tilt rotor aircraft [PDF]
Rotor hover performance data were obtained for two full-scale rotor systems designed for the XV-15 Tilt Rotor Research Aircraft. One rotor employed the rectangular planform metal blades (rotor solidity = 0.089) which were used on the initial flight ...
Alexander, H. +4 more
core +1 more source