Wireless Communication Using Unmanned Aerial Vehicles (UAVs): Optimal Transport Theory for Hover Time Optimization [PDF]
IEEE Transactions on Wireless Communications, 2017 In this paper, the effective use of flight-time constrained unmanned aerial vehicles (UAVs) as flying base stations that can provide wireless service to ground users is investigated. In particular, a novel framework for optimizing the performance of such
Mohammad Mozaffari +2 more
exaly +8 more sources
Autonomous Flight in Hover and Near-Hover for Thrust-Controlled Unmanned Airships
Drones, 2023 The ability of airships to fly in hover is a major plus of this category of flying vehicles. However, especially for the case of autonomous flight, this feature can be exploited only recurring to a carefully designed layout of the thrusters on board ...
Carlo Emanuele Dionigi Riboldi +1 more
exaly +3 more sources
Aerodynamic Optimization of a Micro Quadrotor Aircraft with Different Rotor Spacings in Hover
Applied Sciences (Switzerland), 2020 In order to study the aerodynamic performance of the quadrotor with different rotor spacings in hover, experiments were performed together with numerical simulations. For experimental study, an experimental platform was designed to measure the thrust and
Yao Lei, HengDa Wang
exaly +3 more sources
Perancangan dan Implementasi Sistem Pengaturan Optimal LQR untuk Menjaga Kestabilan Hover pada Quadcopter [PDF]
Jurnal Teknik ITS, 2012 Quadcopter adalah pesawat terbang yang memiliki potensi untuk lepas landas, hover, terbang manuver, dan mendarat bahkan di daerah kecil. Seiring dengan perkembangan teknologi modern, saat ini quadcopter banyak digunakan untuk pengawasan area, pengambilan
Kardono Kardono +2 more
doaj +1 more source
Comparative Study of Coaxial Main Rotor Aerodynamics in the Hover with the Usage of Two Methods of Computational Fluid Dynamics [PDF]
Journal of Aerospace Technology and Management, 2021 The paper is focused on numerical modeling of the aerodynamic characteristics of a full-scale coaxial main rotor in hover. The simulation was performed using two approaches of computational fluid dynamics (CFD): the original free wake model (FWM ...
Sergey Gennadievich Konstantinov +3 more
doaj +1 more source
TWQH Attitude Control Experiments on Horizon Ground Simulator and Flight Test [PDF]
INCAS Bulletin, 2020 This paper presents the results of two experiments on the Horizon ground simulator and outdoor flight test of TWQH hybrid UAV in presence of wind perturbation.
Stefan Eugen STOIAN +4 more
doaj +1 more source
A Computational Investigation of the Hover Mechanism of an Innovated Disc-Shaped VTOL UAV
Drones, 2023 Inventive approaches are constantly being revealed in the field of vertical take-off and landing (VTOL) unmanned aerial vehicle (UAV) configuration concepts and designs.
Samia Shahrin Ahmed Snikdha +1 more
doaj +1 more source
WMLES of flows around small-scale propellers - estimating aerodynamic performance and wake visualization [PDF]
Theoretical and Applied Mechanics, 2023 Wall-modeled large-eddy simulation (WMLES) is an advanced mathematical model for turbulent flows which solves for the low-pass filtered numerical solution. A subgrid-scale (SGS) model is used to account for the effects of unresolved small-scale turbulent
Svorcan Jelena
doaj +1 more source
Numerical Study of Coaxial Main Rotor Aerodynamics in Steep Descent
Aerospace, 2022 Numerical studies of the aerodynamic characteristics of the coaxial main rotor of the Kamov Ka-32 helicopter in steep descent modes, including the area of the vortex ring state (VRS) modes, have been performed.
Pavel Makeev +2 more
doaj +1 more source
Investigation on Aerodynamic Noise Characteristics of Coaxial Rotor in Hover
Applied Sciences, 2022 A numerical method based on Reynolds Averaged Navier–Stokes (RANS) equations and a high-efficiency trim model is developed to simulate the aerodynamics of a coaxial rotor.
Haotian Qi +3 more
doaj +1 more source