|
|
|
|
|
Jia-Ling Xie, Wei-Feng Shi, Ting Xue and Yu-Hang Liu
The fault detection and diagnosis of a ship?s electric propulsion system is of great significance to the reliability and safety of large modern ships. The traditional fault diagnosis method based on mathematical models and expert knowledge is limited by ...
ver más
|
|
|
|
|
|
|
|
|
|
|
Dongsuk Kim, Majid Asli and Klaus Höschler
As the issue of pollutant emissions from aviation propulsion escalates, research into alternative powertrains is gaining momentum. Two promising technologies are the Hybrid Electric Propulsion System (HEPS) and Pressure Gain Combustion (PGC). HEPS is exp...
ver más
|
|
|
|
|
|
|
|
|
|
|
Maria Coutinho, Frederico Afonso, Alain Souza, David Bento, Ricardo Gandolfi, Felipe R. Barbosa, Fernando Lau and Afzal Suleman
The electrification of an aircraft?s propulsive system is identified as a potential solution towards a lower carbon footprint in the aviation industry. One of the effects of increased electrification is the generation of a large amount of waste heat that...
ver más
|
|
|
|
|
|
|
|
|
|
|
Wongwan Jung and Daejun Chang
This study proposed a deep reinforcement learning-based energy management strategy (DRL-EMS) that can be applied to a hybrid electric ship propulsion system (HSPS) integrating liquid hydrogen (LH2) fuel gas supply system (FGSS), proton-exchange membrane ...
ver más
|
|
|
|
|
|
|
|
|
|
|
Wongwan Jung, Jinkwang Lee and Daejun Chang
This study introduced the methodology for integrating ethylene glycol/water mixture (GW) systems which supply heat energy to the liquid hydrogen (LH2) fuel gas supply system (FGSS), and manage the temperature conditions of the battery system. All systems...
ver más
|
|
|
|
|
|
|
|
|
|
|
Agata Kusmierek, Rafal Grzeszczyk, Andreas Strohmayer and Cezary Galinski
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. To ...
ver más
|
|
|
|
|
|
|
|
|
|
|
Alessandro A. Quarta and Giovanni Mengali
The aim of this paper is to investigate the performance of a robotic spacecraft, whose primary propulsion system is an electric solar wind sail (E-sail), in a mission to a heliostationary point (HP)?that is, a static equilibrium point in a heliocentric a...
ver más
|
|
|
|
|
|
|
|
|
|
|
Valerio Marciello, Mario Di Stasio, Manuela Ruocco, Vittorio Trifari, Fabrizio Nicolosi, Markus Meindl, Bruno Lemoine and Priscilla Caliandro
The environmental impact of aviation in terms of noise and pollutant emissions has gained public attention in the last few years. In addition, the foreseen financial benefits of an increased energy efficiency have motivated the transport industry to inve...
ver más
|
|
|
|
|
|
|
|
|
|
|
Giovanni Mengali and Alessandro A. Quarta
A close observation of the near-Sun region, with in situ measurements, requires that a scientific probe be placed in a heliocentric orbit with a perihelion distance on the order of a few solar radii only. This is the solution adopted by the Parker Solar ...
ver más
|
|
|
|
|
|
|
|
|
|
|
Fabian Helmchen, Sophie F. Armanini and Andreas Hupfer
With increasing capabilities of electric motors and energy storage, aircraft designs for electrified commuter and regional aircraft become more relevant than ever. Design concepts are often derived and optimised according to existing, conventional refere...
ver más
|
|
|
|
|
|
|
|
|
|
|
Eytan J. Adler, Benjamin J. Brelje and Joaquim R. R. A. Martins
Electrified aircraft propulsion enables new aircraft designs with fewer emissions. One challenge of electrified architectures is handling the electrical components? waste heat. This is because batteries and other electrical components are sensitive to hi...
ver más
|
|
|
|
|
|
|
|
|
|
|
Yingtao Zhu, Bingjie Zhu, Xixiang Yang, Zhongxi Hou and Jianan Zong
An energy management strategy for a series hybrid electric propulsion system designed for a fixed-wing vertical take-off and landing (VTOL) aircraft is presented in this paper. The proposed method combines an ideal operating line (IOL) and fuzzy logic. F...
ver más
|
|
|
|
|
|
|
|
|
|
|
Kang Woo Chun, Myongho Kim and Jae-Jung Hur
As regulations on emissions from ships become stricter worldwide, new propulsion systems and the use of eco-friendly fuel are being introduced as alternative solutions. Therefore, many studies on electric propulsion systems using various power sources ar...
ver más
|
|
|
|
|
|
|
|
|
|
|
Seongwan Kim, Hyeonmin Jeon, Chybyung Park and Jongsu Kim
In Korea, fishing boats account for 65,452 out of 71,174 coastal ships, and aging ships are a leading cause of environmental problems and economic loss. To solve this problem, the government has enacted a policy to promote the development and distributio...
ver más
|
|
|
|
|
|
|
|
|
|
|
Raphael Zaccone, Ugo Campora and Michele Martelli
In recent decades, the design of ship propulsion systems has been focusing on energy efficiency and low pollutant emissions. In this framework, diesel?electric propulsion has become a standard for many ship types and has proven its worth for flexible pro...
ver más
|
|
|
|
|
|
|
|
|
|
|
Francesco Mauro, Elia Ghigliossi, Vittorio Bucci and Alberto Marinó
Nowadays, sustainable navigation is becoming a trending topic not only for merchant ships but also for pleasure vessels such as motoryachts. Therefore, the adoption of a hybrid-electric propulsion system and the installation of on-board storage devices c...
ver más
|
|
|
|
|
|
|
|
|
|
|
Kyunghwa Kim, Gilltae Roh, Wook Kim and Kangwoo Chun
The shipping industry is becoming increasingly aware of its environmental responsibilities in the long-term. In 2018, the International Maritime Organization (IMO) pledged to reduce greenhouse gas (GHG) emissions by at least 50% by the year 2050 as compa...
ver más
|
|
|
|
|
|
|
|
|
|
|
Manuel Martín Saravia, Luca Bernazzani, Alessio Ceccarini, Alfio Emanuele Vinci and Fabrizio Paganucci
Iodine is considered as a feasible alternative to xenon as a propellant for electric propulsion systems, thanks to its good propulsive performance, high availability, and high storage density. However, as iodine is stored in solid state at ambient temper...
ver más
|
|
|
|
|
|
|
|
|
|
|
Petar Piljek, Denis Kotarski and Matija Krznar
Due to their abilities, multirotor unmanned aerial vehicles (UAVs) can be used in various missions that require complex and precise movements, so they are a typical representative of aerial robots. Since this type of UAV is characterized by high energy c...
ver más
|
|
|
|
|
|
|
|
|
|
|
Aleksandr Golubek,Mykola Dron?,Ludmila Dubovik,Andrii Dreus,Oleksii Kulyk,Petro Khorolskiy
Pág. 78 - 87
A method has been developed for the combined de-orbiting of large-size objects of space debris from low-Earth orbits using an electro-rocket propulsion system as an active de-orbiting means.A principal de-orbiting technique has been devised, which takes ...
ver más
|
|
|
|
|
|