Results 31 to 40 of about 10,974 (193)

Modeling and Control of Distributed-Propulsion eVTOL UAV Hovering Flight

Vehicles
For vertical takeoff and landing (VTOL) control of distributed-propulsion, fixed-wing UAVs exhibiting strong nonlinearity and aerodynamic/propulsive coupling, traditional linearization methods incur significant modeling errors in pitch–roll coupling and ...
Qingfeng Zhao, Yawen Zhang, Rui Wang, Zhou Zhou   +3 more
doaj   +1 more source

Impact of propeller arrangement on aerodynamic performance for a high-lift distributed propulsion system

Engineering Applications of Computational Fluid Mechanics
Distributed electric propulsion is an emerging research topic, with a key advantage being its potential for enhanced lift performance through aerodynamic propeller-wing interactions.
Suqi Chen, Zheng Guo, Duoneng Liu
doaj   +1 more source

Changes in propulsion technique and shoulder complex loading following low-intensity wheelchair practice in novices. [PDF]

PLoS ONE, 2018
BACKGROUND:Up to 80% of wheelchair users are affected by shoulder pain. The Clinical Practice Guidelines for preservation of upper limb function following spinal cord injury suggest that using a proper wheelchair propulsion technique could minimize the ...
Marika T Leving, Riemer J K Vegter, Wiebe H K de Vries, Sonja de Groot, Lucas H V van der Woude   +4 more
doaj   +1 more source

A Novel Robust Hybrid Control Strategy for a Quadrotor Trajectory Tracking Aided with Bioinspired Neural Dynamics

Applied Sciences
This paper introduces a novel hybrid control strategy for quadrotor UAVs inspired by neural dynamics. Our approach effectively addresses two common issues: the velocity jump problem in traditional backstepping control and the control signal chattering in
Jianqi Li, Xin Li, Jianquan Lu, Binfang Cao, Jian Sun   +4 more
doaj   +1 more source

Drag Reduction by Wingtip-Mounted Propellers in Distributed Propulsion Configurations

Fluids, 2022
Tip-mounted propellers can increase wing aerodynamic efficiency, and the concept is gaining appeal in the context of hybrid electrical propulsion for greener aviation, as smaller and lighter electrical motors can help with mitigating structural drawbacks
Mauro Minervino, Giovanni Andreutti, Lorenzo Russo, Renato Tognaccini   +3 more
doaj   +1 more source

Turboelectric Distributed Propulsion System Modelling [PDF]

, 2013
The Blended-Wing-Body is a conceptual aircraft design with rear-mounted, over wing engines. Turboelectric distributed propulsion system with boundary layer ingestion has been considered for this aircraft.
Liu, Chengyuan
core  

Techno-economic and environmental risk assessment of a turbo-electric distributed propulsion system on a blended wing body aircraft [PDF]

, 2014
Constant rise of air traffic has caused the environmental impacts of aviation to be the subject of an unprecedented scrutiny. Organisations all over the world are setting targets for emission reductions that represent the technological potential for ...
Giakoumakis, Eleftherios
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Lift enhancement characteristics of distributed propulsion wing with propulsion-aerodynamic coupling

Kongqi donglixue xuebao
To reconcile the high-lift demands of short takeoff and landing (STOL) with the requirement for efficient cruise in unmanned aerial vehicles (UAVs), this paper presents a novel distributed propulsion wing lift enhancement configuration (DPWLEC) that ...
Jingting YANG, Kelei WANG, Zhou ZHOU, Jia ZENG   +3 more
doaj   +1 more source

Aerodynamic Performance Assessment of Distributed Electric Propulsion after the Wing Trailing Edge

Applied Sciences, 2023
Distributed electric propulsion (DEP) with four propellers distributed along the rear edge of the wing (pusher DEP configuration) promote aerodynamic interactions to a higher level.
Yao Lei, Xiangzheng Zhao
doaj   +1 more source

Modelling & integration of advanced propulsion systems [PDF]

, 2008
This research study focuses on the design of advanced propulsion cycles, having as primary design goal the improvement on noise emissions and fuel consumption.
Doulgeris, Georgios C.
core