Results 41 to 50 of about 1,986 (195)

Sliding Mode‐Based Control of a UAV Quadrotor for Suppressing the Cable‐Suspended Payload Vibration

Journal of Control Science and Engineering, Volume 2020, Issue 1, 2020., 2020
This paper addresses the problem of damping vibrations of a cable‐suspended payload during positioning of the quadrotor. A nonlinear model is derived for the coupled quadrotor‐pendulum system in the X-Z plane using Euler–Lagrange formulation. Sliding mode control (SMC) is used for horizontal positioning and payload vibration damping, while a feedback ...
Tom Kusznir, Jaroslaw Smoczek, Radek Matušů   +2 more
wiley   +1 more source

Structural Scalability Preliminary Studies for the Next Generation Civil Tiltrotor Composite Wing

Aerospace, 2023
This paper is focused on structural scalability studies of a new generation of civil tiltrotor wingbox structures. Starting from a reference wingbox, developed under the H2020 Clean Sky 2 NGCTR-TD T-WING project, a geometric scaling was performed to ...
Aniello Daniele Marano, Gianluca Diodati, Nicola Paletta, Luigi Di Palma, Marika Belardo, Pierre Abdel Nour   +5 more
doaj   +1 more source

The Feasibility Assessment Study of Bridge Crack Width Recognition in Images Based on Special Inspection UAV

Advances in Civil Engineering, Volume 2020, Issue 1, 2020., 2020
Bridge defects are important indicator for the bridge safety assessment. Considering the cost and inefficiency of the traditional method, the UAV system applied for bridge crack inspection is a better choice. Therefore, we have configured a bridge inspection UAV system with SLR camera, laser rangefinder.
Xiong Peng, Xingu Zhong, Chao Zhao, Y. Frank Chen, Tianyu Zhang, Xueping Fan   +5 more
wiley   +1 more source

Development in aerodynamic design of tiltrotor aircraft

Hangkong gongcheng jinzhan
The tiltrotor aircraft has both traditional helicopter vertical takeoff and landing, airborne hovering capabilities, and high-speed cruising performance of fixed wing aircraft. The excellent flight performance of tiltrotor aircraft has enormous potential
WANG Zonghui, YANG Yunjun, ZHAO Jiaxiang
doaj   +1 more source

Numerical Simulation of Rotor–Wing Transient Interaction for a Tiltrotor in the Transition Mode

Mathematics, 2019
Tiltrotor aerodynamic interaction, especially in the transition mode, is a necessary consideration for tiltrotor aerodynamics, and structural design and optimization. Previous studies have paid much attention to the helicopter mode.
Zhenlong Wu, Can Li, Yihua Cao
doaj   +1 more source

Coupling Mid-Fidelity Aerodynamics and Multibody Dynamics for the Aeroelastic Analysis of Rotary-Wing Vehicles

Energies, 2021
A mid-fidelity aerodynamic solver based on the vortex particle method for wake modeling, DUST, is coupled through the partitioned multi-physics coupling library preCICE to a multibody dynamics code, MBDyn, to improve the accuracy of aeroelastic numerical
Alberto Savino, Alessandro Cocco, Alex Zanotti, Matteo Tugnoli, Pierangelo Masarati, Vincenzo Muscarello   +5 more
doaj   +1 more source

Mathematical Modeling and Modal Switching Control of a Novel Tiltrotor UAV

Journal of Robotics, 2018
This paper concentrates on the flight control of a novel tiltrotor aircraft with fixed wings. This kind of aircraft has two flight modes and a transition mode.
Zhiwei Kong, Qiang Lu
doaj   +1 more source

A Preliminary Study on the Development of a New UAV Concept and the Associated Flight Method

Drones, 2023
This article presents a preliminary study on the development of a new concept for an unmanned aerial vehicle (UAV) design that incorporates the use of four wings and attached systems to improve overall performance, it being classified as a hybrid ...
Tiberius-Florian Frigioescu, Mihaela Raluca Condruz, Teodor Adrian Badea, Alexandru Paraschiv   +3 more
doaj   +1 more source

Basic principals of the tiltrotors flight control system architecture and algorithms

Научный вестник МГТУ ГА
This study describes the main structure and algorithm development principles of flight control systems for tiltrotor aircraft using the example of rotary-wing aircraft V-22 Osprey and AW609.
M. I. Myasnikov, I. R. Ilyin
doaj   +1 more source

A Distributed k‐WTA Neural Network for Multi‐UAV Formation Stabilization

IET Control Theory &Applications, Volume 20, Issue 1, January/December 2026.
This paper proposes a distributed k‐winner‐take‐all (k‐WTA) neural selection–control model that achieves globally optimal competitive selection with low communication costs and rigorous stability guarantees via local neighbour communication. A double closed‐loop cooperative formation control strategy is further designed based on the model, featuring ...
Chongjing Liu, Yiguo Yang
wiley   +1 more source