Results 101 to 110 of about 15,184 (243)

Concept Evaluation of Radical Short–Medium-Range Aircraft with Turbo-Electric Propulsion

Aerospace
Ambitious targets for the coming decades have been set for further reductions in aviation greenhouse gas emissions. Hybrid electric propulsion (HEP) concepts offer potential for the mitigation of these aviation emissions. To investigate this potential in
W. J. Vankan, W. F. Lammen, E. Scheers, P. J. Dewitte, Sebastien Defoort   +4 more
doaj   +1 more source

HASTECS: A typical MDO process for future Hybrid Electric aircrafts

, 2021
International audienceIn the framework of hybrid and full electric design of future greener aircrafts, this paper focuses on the multidisciplinary design optimization (MDO) of the powertrain system for a series hybrid electric architecture.
Roboam, Xavier
core  

Design and Testing of a Minimal Configuration Underwater Micro‐Glider: Automating Lake and Reservoir Monitoring

Journal of Field Robotics, EarlyView.
ABSTRACT Uncrewed underwater vehicles (UUVs) have transformed oceanographic research through autonomous data gathering. Similarly, lake and other aquatic research can potentially be automated and transformed. However, UUVs would need to be smaller, lighter, less complex, and cheaper than currently available to make them more practical and user‐friendly
James M Rand, Alan Hunter, Danielle Wain, Lee D Bryant   +3 more
wiley   +1 more source

Integrated LEO Constellation and In‐Cabin Distribution System for Continuous Aircraft 5G Connectivity

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT The integration of low Earth orbit (LEO) satellite constellations with commercial aircraft communication systems presents critical challenges in maintaining continuous connectivity during dynamic flight conditions. Current geostationary satellite systems suffer from high round‐trip latency (>$$ > $$ 500 ms) and inadequate coverage at high ...
Raúl Parada, Victor Monzon Baeza, Carlos Horcajo Fernández de Gamboa, Rocío Serrano Camacho, Carlos Monzo   +4 more
wiley   +1 more source

A comparative study of different propulsion models for hybrid electric aircraft

, 2020
International audienceThis paper addresses the topic of multidisciplinary analysis (MDA) applied to hybrid electric aircraft (HEA) design focusing on the analysis of multi-fidelity models for hybrid electric powertrain design.
Jordan, Arnaud, Palladino, Vincenzo, Pommier-Budinger, Valérie, Dubreuil, Sylvain, Bénard, Emmanuel, Defoort, Sébastien, Schmollgruber, Peter, Bartoli, Nathalie   +7 more
core  

Artificial neural network control strategies for fuel cell hybrid system [PDF]

, 2013
The greening of air transport is the driver for developing technologies to reduce the environmental impact of aviation with the aim of halving the amount of carbon dioxide (COଶ) emitted by air transport, cutting specific emissions of nitrogen oxides ...
Oheda, Hakim
core  

Isolation, Insularity and Resilience: A Review of the Geophysical, Socioeconomic, and Environmental Vulnerabilities of Gran Canaria and Lesvos Islands for Policy Interventions to Global Change

Sustainable Development, EarlyView.
ABSTRACT The dynamic nature of small islands being geographically isolated and their perceived connectedness with global networks complicates research attempts to draw general conclusions on whether insularity leads to marginalization or strengthens their resilience for sustainable development.
Toheeb Lekan Jolaosho, Mazen Marouani, Takwa Boughanmi   +2 more
wiley   +1 more source

A Study on Power System Retrofit for Cessna-172S Aircraft by Using Hydrogen Fuel Cell and Battery Hybrid

IEEE Access
The electrification of aviation is predominantly driven by environmental concerns associated with emissions. In this context, while the More Electric Aircraft and Hybrid Electric Aircraft concepts are currently at the forefront, the long-term objective ...
Oguz Kagan Keles, Ibrahim Hakyemez, Mustafa Bagriyanik, Ozcan Kalenderli   +3 more
doaj   +1 more source

Modeling and simulation enabled UAV electrical power system design

, 2011
With the diversity of mission capability and the associated requirement for more advanced technologies, designing modern unmanned aerial vehicle (UAV) systems is an especially challenging task.
Rakhra, Puran, Burt, Graeme, Steven David Angus Fletcher, Graeme Burt, Norman, Patrick, Galloway, Stuart, Patrick Norman, Fletcher, Steven, Stuart Galloway, Puran Rakhra, Lowe, V., Vince Lowe   +11 more
core   +1 more source

Resource reallocation across successive systemic innovations: How Rolls‐Royce shaped the evolution of the turbojet, turboprop, and turbofan

Strategic Management Journal, EarlyView.
Abstract Research Summary Despite the importance of resource reallocation in shaping a variety of strategic outcomes, strategy scholars have paid only limited attention to the processes by which firms reallocate their resources across successive systemic innovations.
Gino Cattani, Mariano Mastrogiorgio, Giuseppe Carignani   +2 more
wiley   +1 more source