Results 1 to 10 of about 4,154,170 (239)

Multi-Objective Design of a Distributed Ducted Fan System

open access: yesAerospace, 2022
The distributed propulsion system applied to the vertical take-off and landing aircraft must maintain the high performance in both hover and cruise flight.
Jiahao Guo, Zhou Zhou
doaj   +4 more sources

Aerodynamic Characteristics of a Ducted Fan Hovering and Transition in Ground Effect

open access: yesAerospace, 2022
Ducted fans installed on vertical takeoff and landing vehicles experience significant ground effect during takeoff and landing. The aerodynamic characteristics of a ducted fan hovering and transitioning in the ground effect are studied using numerical ...
Yanxiong Zhao, Yun Tian, Zhiqiang Wan
doaj   +4 more sources

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

open access: yesAerospace, 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   +5 more
doaj   +4 more sources

Safe Reinforcement Learning for Transition Control of Ducted-Fan UAVs

open access: yesDrones, 2023
Ducted-fan tail-sitter unmanned aerial vehicles (UAVs) provide versatility and unique benefits, attracting significant attention in various applications.
Yanbo Fu, Wenjie Zhao, Liu Liu
doaj   +4 more sources

Modeling of a Novel Coaxial Ducted Fan Aerial Robot Combined with Corner Environment by Using Artificial Neural Network. [PDF]

open access: yesSensors (Basel), 2020
A novel coaxial ducted fan aerial robot with a manipulator is proposed which can achieve some hover operation tasks in a corner environment, such as switching on and off a wall-attached button on the corner. In order to study the aerodynamic interference
Ai T, Xu B, Xiang C, Fan W, Zhang Y.
europepmc   +2 more sources

Thermal Benefits of a Cooling Guide Vane for an Electrical Machine in an Electric Ducted Fan

open access: yesAerospace, 2022
Equipped with a distributed electric propulsion system, eVTOL is the primary vehicle for future urban air mobility. The electrical machine determines the weight of the distributed electric propulsion system, and the cooling capability determines the ...
Xuanyang Hu   +5 more
doaj   +2 more sources

Model Predictive Control Technique for Ducted Fan Aerial Vehicles Using Physics-Informed Machine Learning

open access: yesDrones, 2022
This paper proposes a model predictive control (MPC) approach for ducted fan aerial robots using physics-informed machine learning (ML), where the task is to fully exploit the capabilities of the predictive control design with an accurate dynamic model ...
Tayyab Manzoor   +3 more
doaj   +2 more sources

Modeling and control of a novel facade cleaning robot with four-ducted fan drive

open access: yesInternational Journal of Advanced Robotic Systems, 2021
With the development of modern cities, the demand for cleaning glass curtain walls in urban skyscrapers is increasing, and therefore, many researches on facade cleaning robots have been carried out in the past few decades.
Xiao-Peng Li, Xin Wang, Bin Feng
doaj   +2 more sources

Preliminary design and evaluation of a ducted-fan type pipeline robot

open access: yesROBOMECH Journal
Pipelines are crucial infrastructure supporting human life, yet their maintenance costs are substantial, necessitating the development of time-efficient robotic systems.
Shota Miyake   +3 more
doaj   +2 more sources

Aerodynamic Characteristics of Helicopter with Ducted Fan Tail Rotor in Hover under Low-Speed Crosswind

open access: yesInternational Journal of Aerospace Engineering, 2020
The tail rotor of a helicopter operating under low-speed crosswind undergoes highly complex flow due to the interaction between the main rotor, fuselage, and tail rotor system.
Nahyeon Roh, Sejong Oh, Donghun Park
doaj   +2 more sources

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