Results 21 to 30 of about 45,704 (312)

Design Tradeoffs in Full Electric, Hybrid and Full Chemical Propulsion Communication Satellite

open access: yesSakarya University Journal of Computer and Information Sciences, 2019
Full electric propulsion system becomes popular recently and getting more common in the communication satellite industry. Full electric or hybrid propulsion selection causes results in significant reduction in satellite propellant mass. Conventional full
Ü.cezmi Yılmaz, İbrahim Oz
doaj   +1 more source

Optimization design and sensitivity analysis of diesel/battery hybrid propulsion system for polar icebreaker

open access: yesZhongguo Jianchuan Yanjiu, 2021
ObjectivesFor the economic and environmental requirements of polar ice-breakers, a hybrid propulsion system composed of diesel generator sets and a rechargeable battery is proposed.
Wenlong DU, Fengxiang GUO, Li CHEN
doaj   +1 more source

Design of DC grid system for green intelligent hybrid bulk carrier

open access: yesZhongguo Jianchuan Yanjiu, 2023
ObjectiveAccording to the characteristics of the complex waterways of inland rivers, a DC grid solution based on a multi-energy parallel hybrid green intelligent bulk carrier is proposed.
Li SU
doaj   +1 more source

Electric Waterborne Public Transportation in Venice: a Case Study [PDF]

open access: yes, 2015
The paper reports the results of a study for moving the present diesel-based watercraft propulsion technology used for public transportation in Venice city and lagoon to a more efficient and smart electric propulsion technology, in view of its adopted in
Bolognani, Silverio   +4 more
core   +1 more source

Analytical, circle-to-circle low-thrust transfer trajectories with plane change [PDF]

open access: yes, 2013
Orbit averaging techniques are used to develop analytical approximations of circle-to-circle low-thrust trajectory transfers with plane-change about the Sun.
Appourchaux T.   +5 more
core   +1 more source

Voltage synchronisation for hybrid-electric aircraft propulsion systems [PDF]

open access: yesThe Aeronautical Journal, 2021
AbstractIncreasing demand for commercial air travel is projected to have additional environmental impact through increased emissions from fuel burn. This has necessitated the improvement of aircraft propulsion technologies and proposal of new concepts to mitigate this impact.
K. Ibrahim, S. Sampath, D. Nalianda
openaire   +3 more sources

IPMSM torque control strategies based on LUTs and VCT feedback for robust control under machine parameter variations [PDF]

open access: yes, 2016
In recent years, Interior Permanent Magnet Synchronous Machines (IPMSMs) have attracted a considerable attention in the scientific community and industry for Electric and Hybrid Electric Vehicle (HEV) propulsion systems.
Arias Pujol, Antoni   +6 more
core   +1 more source

Hybrid Propulsion Systems for Remotely Piloted Aircraft Systems

open access: yesAerospace, 2018
The development of more efficient propulsion systems for aerospace vehicles is essential to achieve key objectives. These objectives are to increase efficiency while reducing the amount of carbon-based emissions.
Mithun Abdul Sathar Eqbal   +3 more
doaj   +1 more source

A novel interplanetary communications relay [PDF]

open access: yes, 2010
A case study of a potential Earth-Mars interplanetary communications relay, designed to ensure continuous communications, is detailed. The relay makes use of orbits based on artificial equilibrium points via the application of continuous low thrust ...
Andersson G.   +12 more
core   +1 more source

Smart Design: Application of an Automatic New Methodology for the Energy Assessment and Redesign of Hybrid Electric Vehicle Mechanical Components

open access: yesVehicles, 2022
This work aimed to develop an automatic new methodology based on establishing if a mechanical component, designed for a conventional propulsion system, is also suitable for hybrid electric propulsion.
Umberto Previti   +3 more
doaj   +1 more source

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