Results 21 to 30 of about 69,343 (215)
Design and hardware-in-the-loop test of the embedded control system of an indoor quadrotor helicopter [PDF]
, 2008 The paper deals with the quick prototype design and hardware-in-the-loop real-time test of the embedded control system of an indoor miniature quadrotor helicopter (UAV) before first flight.
Lantos, Béla +5 more
core +2 more sources
Neural Network Adaptive Attitude Control of Full-States Quad Tiltrotor UAV
AerospaceThe control stability and accuracy of quad tiltrotor UAVs is improved when encountering external disturbances during automatic flight by an active disturbance rejection control (ADRC) parameter self-tuning control strategy based on a radial basis ...
Jiong He +5 more
doaj +1 more source
Dendrite Refinement and Improved Mechanical Properties of SiC/TiC/Al Hybrid Nanocomposites
Advances in Materials Science and Engineering, 2022 Hybrid nano-(SiCp + TiCp)/Al composites were fabricated by liquid ultrasonic assisted semisolid stirring processing. The eutectic silicon of Al matrix changes from acicular to fine granular with addition of nanoparticles and the dendrite size of primary ...
Hui Xie, Jinze Lv
doaj +1 more source
GARTEUR Helicopter Cooperative Research [PDF]
, 2010 This paper starts with an overview about the general structure of the Group for Aeronautical Research and Technology in EURope (GARTEUR). The focus is on the activities related to rotorcraft which are managed in the GARTEUR Helicopter Group of ...
Pahlke, Klausdieter
core
The effect of helicopter configuration on the fluid dynamics of brownout [PDF]
, 2008 Brown’s Vorticity Transport Model, coupled to an additional particle transport model, is used to simulate the development of the dust cloud that can form around a helicopter when operating in dusty or desert conditions.
Brown, R.E. +3 more
core +5 more sources
American Journal of Community Psychology, EarlyView.Abstract Evaluations of community‐engaged research (CEnR) typically emphasize health outcomes rather than the partnership processes that contribute to intervention effectiveness. This scoping review synthesized community partner‐identified strategies for successful community‐academic health research partnerships with Black American communities and ...
Kaylyn A. Garcia +6 more
wiley +1 more source
The flow physics of helicopter brownout [PDF]
, 2010 The formation of the dust cloud that is associated with low-level helicopter operations in desert environments has been simulated using the Vorticity Transport Model together with a coupled model to represent the entrainment and subsequent transport of ...
Brown, R.E. +2 more
core +3 more sources
Photothermal bubble: Dynamics, manipulation, and applications
Droplet, EarlyView.As a versatile platform for bubble manipulation, photothermal techniques empower diverse operations: planar translation by scanning the laser spot, sustained periodic bouncing from competing thermal and hydrodynamic flows, and even guided 3D trajectories achieved by tailoring the heating configuration.
Man Hu, Feng Wang, Daosheng Deng
wiley +1 more source
Installation Effect of the Rear-Mounted Tails of a Compound Helicopter on Its Propeller Noise
AerospaceFor high-speed compound helicopters, such as the S-97 Raider, the reflection and diffraction effects of vertical/horizontal tails on pusher propeller noise are inevitable.
Tao Yang +5 more
doaj +1 more source
Modelling the helicopter rotor aerodynamics at forward flight with free wake model and URANS method
Aviation, 2020 The presented work is dedicated to the numerical study of the aerodynamic characteristics of the helicopter rotor. Two approaches to modeling of the rotor are applied: the free wake model developed by the Authors with using steady airfoil characteristics
Yuri Ignatkin +3 more
doaj +1 more source