Results 41 to 50 of about 6,732 (195)

Particle swarm optimization based proportional-derivative parameters for unmanned tilt-rotor flight control and trajectory tracking

open access: yesAutomatika, 2020
This paper presents the dynamic modelling and control technique for a tilt-rotor aerial vehicle operating in bi-rotor mode. This kind of aircraft combines two flight envelopes, making it ideal for scenarios that require hovering, vertical take-off ...
Nada El Gmili   +3 more
doaj   +1 more source

Design, 3D FEM Simulation and Prototyping of a Permanent Magnet Spherical Motor

open access: yesActuators, 2021
In recent years, large tilt angles, uniform magnetic flux distributions, strong forces, and large torques for motors have increasingly become important for robotics, biomedical, and automotive applications that have multi-degrees of freedom (MDOFs ...
Umut Yusuf Gündoğar   +1 more
doaj   +1 more source

Turning flight simulation of tilt-rotor plane with fluid-rigid body interaction

open access: yesJournal of Thermal Science and Technology, 2020
Six degrees of freedom turning flight simulation is presented for a tilt-rotor aircraft represented by V-22 Osprey, considering interaction of fluid and rigid body in a coupled manner.
Ayato TAKII   +3 more
doaj   +1 more source

Analysis of the influence of transition state control strategy on structural load of quad-tiltrotor

open access: yesHangkong gongcheng jinzhan
There are complex structural load changes in the rotor during the tilt-transition of quad-tiltrotor aircraft,which can directly affect the life of the rotor.
HE Yongtao   +3 more
doaj   +1 more source

A Nonlinear Robust Sliding Mode Controller with Auxiliary Dynamic System for the Hovering Flight of a Tilt Tri-Rotor UAV

open access: yesApplied Sciences, 2020
The tilt tri-rotor unmanned aerial vehicle (UAV) has three flight modes: the hover mode, the transition mode, and the fixed-wing mode. Controller design in the hover mode is the premise of realizing stable flight of this kind of UAV.
Guang He   +3 more
doaj   +1 more source

TILT-ROTOR AERODYNAMICS ACTIVITIES DURING THE NICETRIP PROJECT

open access: yes, 2014
The aerodynamic re-design and characterization of the Erica tilt-rotor aircraft, carried out by some Partners of the NICETRIP consortium, is presented. The re-design activities concern some specific aircraft components, like the fuselage/wing fairing, the wing airfoils, the blade cuff and the rotor spinner.
VIGEVANO, LUIGI   +5 more
openaire   +3 more sources

Mathematical modeling and vertical flight control of a tilt-wing UAV [PDF]

open access: yes, 2012
This paper presents a mathematical model and vertical flight control algorithms for a new tilt-wing unmanned aerial vehicle (UAV). The vehicle is capable of vertical take-off and landing (VTOL).
Aksit, Mahmut Faruk   +15 more
core   +1 more source

Empirical Modeling of Tilt-Rotor Aerodynamic Performance

open access: yes, 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

Asynchronous Tilt Transition Control of Quad Tilt Rotor UAV

open access: yesDrones
To address the challenges inherent in the transition flight control of QTR UAVs, this paper proposes an asynchronous tilt transition control framework that integrates NDIC with an ESO.
Xuebing Li   +4 more
doaj   +1 more source

Cost characteristics of tilt-rotor, conventional air and high speed rail short-haul intercity passenger service [PDF]

open access: yes
The cost analysis done to support an assessment of the potential for a small tilt-rotor aircraft to operate in short-haul intercity passenger service is described in detail.
Morlok, Edward K.   +1 more
core   +1 more source

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