Results 11 to 20 of about 5,335 (262)

Designing Electric Propulsion Systems for UAVs [PDF]

open access: yes, 2011
Due to the advantages of electric motors and electric batteries, the electric propulsion systems are widely used in UAVs [1,2]. The UAV's performance and endurance, the payload capacity and the flight time of the vehicle are affected highly by the structure and design of the electric propulsion system. In this paper, a new systematic design methodology
Mohamed Kara Mohamed   +2 more
openaire   +1 more source

Evaluation and Comparison of Hybrid Wing VTOL UAV with Four Different Electric Propulsion Systems

open access: yesAerospace, 2021
Electric propulsion technology has attracted much attention in the aviation industry at present. It has the advantages of environmental protection, safety, low noise, and high design freedom.
Jianan Zong   +4 more
doaj   +1 more source

Speed-loop bandwidth design method for controller parameters of ship hydrogen storage DC electric propulsion system

open access: yesZhongguo Jianchuan Yanjiu, 2023
ObjectivesThis paper aims to study the problems that the external electrical characteristics of a hydrogen fuel cell are soft, its dynamic characteristics are poor and its system stability is susceptible to the influence of propulsion load in marine ...
Wujian SONG   +4 more
doaj   +1 more source

Ion Electric Propulsion System Electric Breakdown Problems: Causes, Impacts and Protection Strategies

open access: yesIEEE Access, 2023
Ion electric propulsion systems have been widely used in satellite station keeping, attitude control, and orbit transfer due to their advantages of high specific impulse, good flexibility, and high reliability.
Zheng Peng   +5 more
doaj   +1 more source

MATHEMATICAL MODELING OF ELECTRIC HEATING ENGINE ON START-UP

open access: yesАвіаційно-космічна техніка та технологія, 2019
The subject of research in the article is the process of accelerating the working fluid in an electric heating thruster, which is part of the onboard propulsion system used in space tug.
Андрей Владимирович Погудин
doaj   +1 more source

Propulsion Drive Models for Full Electric Marine Propulsion Systems [PDF]

open access: yes2007 IEEE International Electric Machines & Drives Conference, 2007
Integrated full electric propulsion systems are being introduced across both civil and military marine sectors. Standard power system analysis packages cover electrical and electromagnetic components but have limited models of mechanical subsystems and their controllers.
Apsley, J.M.   +9 more
openaire   +7 more sources

Key Technologies for the Application of the Electric Propulsion System on the GEO Satellite Platform

open access: yesMeasurement + Control, 2008
Applying the electric propulsion system on GEO satellite in the future is an inevitable trend in China. For this purpose, a lot of problems should be solved not only thruster itself but also the whole system.
Bian Bingxiu, Wei Yanming, Li Yong
doaj   +1 more source

A Back–Forward Approach-Based Efficiency Performance Analysis Model for Hybrid Electric Propulsion Ships Using the Holtrop–Mennen Method

open access: yesJournal of Marine Science and Engineering, 2023
Due to tightening regulations on exhaust emissions from ships, there is a growing need to develop electric or hybrid electric propulsion systems to replace conventional diesel-based ship power systems.
Soon Ho Hong, Dong Min Kim, Sun Je Kim
doaj   +1 more source

Analysis of Electric Propulsion System for Exploration of Saturn [PDF]

open access: yesMathematical Problems in Engineering, 2009
Exploration of the outer planets has experienced new interest with the launch of the Cassini and the New Horizons Missions. At the present time, new technologies are under study for the better use of electric propulsion system in deep space missions. In the present paper, the method of the transporting trajectory is used to study this problem.
Solórzano, Carlos Renato Huaura   +2 more
openaire   +2 more sources

Analysis Leading to the Design of a Hybrid Gas-Electric Multi-Engine Testbed

open access: yesAerospace, 2023
Given the increase in air traffic, the main challenges in aircraft design are in-flight emissions and noise heard by the community. These problems have thus far been solved by incremental improvements in aerodynamics, engine technology and operation.
Agata Kuśmierek   +3 more
doaj   +1 more source

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