Results 41 to 50 of about 10,092 (210)

Experimental Investigation of Aerodynamic Interaction in Non-Parallel Tandem Dual-Rotor Systems for Tiltrotor UAV

Drones
The distributed electric tilt-rotor Unmanned Aerial Vehicle (UAV) combines the vertical take-off and landing (VTOL) capability of helicopters with the high-speed cruise performance of fixed-wing aircraft, offering a transformative solution for Urban Air ...
He Zhu, Yuhao Du, Hong Nie, Zhiyang Xin, Xi Geng   +4 more
doaj   +1 more source

Development of the mathematical model for the tilt-rotor aircraft

Journal of Physics: Conference Series, 2021
Abstract In this paper, main challenges of the urban air mobility concept are discussed and comparison of the different aircraft types, capable of performing vertical take-off and landing for compliance to the urban aerial mobility concept is provided.
K S Lelkov, D V Ulyanov, D A Surkov, A N Ushakov   +3 more
openaire   +1 more source

Advances in Triboelectric Nanogenerators With Rotating Structure

Carbon Energy, EarlyView.
The rotating TENG has been widely studied for its superiorities of simple structure, high efficiency, and stable output. This review introduced the four different principles of rotating TENG and offered a thorough summary for performance and application research through three‐level classification. Importantly, the current existing problems, challenges,
Chuguo Zhang, Chunxu Xue, Yutong Chen, Yujie Qiang, Seeram Ramakrishna   +4 more
wiley   +1 more source

Design and Implementation of a Novel Tilt-Rotor Tri-Copter UAV Configuration

Engineering Proceedings
Hover-capable unmanned aerial vehicles (UAVs), including rotary-wing UAVs such as unmanned helicopters, multi-rotor drones, and tilt-rotor UAVs, are widely employed due to their hovering capabilities.
Zishi Shen, Fan Liu
doaj   +1 more source

A Conceptual Design and Optimization Approach for Distributed Electric Propulsion eVTOL Aircraft Based on Ducted-Fan Wing Unit

Aerospace, 2022
The distributed electric propulsion (DEP) eVTOL aircraft has gained rising interest for its promising potential in high-speed cruise compared with conventional tilt-rotor configuration.
Tielin Ma, Xiangsheng Wang, Nanxuan Qiao, Zilun Zhang, Jingcheng Fu, Mingmin Bao   +5 more
doaj   +1 more source

Swashplate feedback control for tilt-rotor aircraft [PDF]

, 1974
Changes in angle of attack in system were sensed indirectly by gages which responded to strains induced in wing structure. Output signals were amplified, filtered, and used to activate swashplate actuators.
Alexander, H. R., Magee, J. P., Morris, J. J.   +2 more
core   +1 more source

Design of HAWT Rotor for Non‐Uniform Inflow Conditions: A Theoretical and Experimental Approach for Shear Flow

Energy Science &Engineering, EarlyView.
This paper aims to provide a robust design approach for HAWTs operating in shear flow. This study fills a critical research gap by integrating BEM and vortex theories for blade design in non‐homogeneous inflow conditions. The authors of the paper made an effort to develop and test an experimentally unsophisticated model of a turbine working in shear ...
Agnieszka Dorota Woźniak, Piotr Strzelczyk, Taeseong Kim   +2 more
wiley   +1 more source

Lyapunov-Based Tracking Control of a Bi-Rotor [PDF]

Journal of Applied and Computational Mechanics
This paper discusses the modeling and trajectory tracking control of a Bi-rotor. A novel class of vertical flight robots that can perform vertical takeoff, landing, and passenger transportation.
Mohammad Ganji-Nahoji, Ali Keymasi-Khalaji   +1 more
doaj   +1 more source

HyLPD Digital Twin Control for UAV Stability in High‐Wind Conditions

Optimal Control Applications and Methods, EarlyView.
This work introduces a novel HyLPD, a hybrid control framework combining Linear Quadratic Regulator (LQR) for baseline stability and Deep Deterministic Policy Gradient (DDPG) for adaptive compensation, tailored for UAVs under high‐wind conditions.
Cara Rose, Robert McMurray, Muhammad Usman Hadi   +2 more
wiley   +1 more source

Subterranean Mine Inspection Using the Prometheus Re‐Configurable Drone

Journal of Field Robotics, EarlyView.
ABSTRACT This paper describes the design, development, and real‐world testing of an autonomous drone for subterranean exploration, known as “Prometheus.” Driven by requirements from industry that the drone be able to be deployed through areas of restricted access, Prometheus was designed to be directly deployed through a 150 mm aperture.
Liam Brown, Robert Clarke, Ali Akbari, Ferdian Jovan, Jameel Marafie, Ognjen Marjanovic, Sara Bernardini, Tom Richardson, Simon Watson   +8 more
wiley   +1 more source