scholarly journals Analysis of Electric Propulsion System for Exploration of Saturn

2009 ◽  
Vol 2009 ◽  
pp. 1-14 ◽  
Author(s):  
Carlos Renato Huaura Solórzano ◽  
Antonio Fernando Bertachini de Almeida Prado ◽  
Alexander Alexandrovich Sukhanov
Keyword(s):  
Electric Propulsion ◽  
New Technologies ◽  
Propulsion System ◽  
Keplerian Orbit ◽  
Low Thrust ◽  
Propulsion Systems ◽  
New Horizons ◽  
Outer Planets ◽  
Electric Propulsion System ◽  
Solar Electric Propulsion

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. This approximated method for the flight optimization with power-limited low thrust is based on the linearization of the motion of a spacecraft near a keplerian orbit that is close to the transfer trajectory. With the goal of maximizing the mass to be delivered in Saturn, several transfers were studied using nuclear, radioisotopic and solar electric propulsion systems.

scholarly journals Outer Planet Missions with Electric Propulsion Systems—Part I

2010 ◽  
Vol 2010 ◽  
pp. 1-11 ◽  
Author(s):  
Carlos Renato Huaura Solórzano ◽  
Antonio Fernando Bertachini de Almeida Prado ◽  
Alexander Alexandrovich Sukhanov
Keyword(s):  
Electric Propulsion ◽  
New Technologies ◽  
Outer Planet ◽  
Low Thrust ◽  
Propulsion Systems ◽  
New Horizons ◽  
Outer Planets ◽  
Entire Trajectory ◽  
Planet Exploration ◽  
Interplanetary Missions

For interplanetary missions, efficient electric propulsion systems can be used to increase the mass delivered to the destination. Outer planet exploration has experienced new interest with the launch of the Cassini and New Horizons Missions. At the present, new technologies are studied for better use of electric propulsion systems in missions to the outer planets. This paper presents low-thrust trajectories using the method of the transporting trajectory to Uranus, Neptune, and Pluto. They use nuclear and radio isotopic electric propulsion. These direct transfers have continuous electric propulsion of low power along the entire trajectory. The main goal of the paper is to optimize the transfers, that is, to provide maximum mass to be delivered to the outer planets.

scholarly journals Large-Scale Electric Propulsion Systems in Ships Using an Active Front-End Rectifier

2019 ◽  
Vol 7 (6) ◽  
pp. 168
Author(s):  
Hyeonmin Jeon ◽  
Jongsu Kim ◽  
Kyoungkuk Yoon
Keyword(s):  
Phase Angle ◽  
Electric Propulsion ◽  
Large Scale ◽  
Measurement Data ◽  
Propulsion System ◽  
Propulsion Systems ◽  
Zero Crossing ◽  
Electric Propulsion System ◽  
Front End ◽  
Harmonic Content

In the case of the electric propulsion system on the vessel, Diode Front End (DFE) rectifiers have been applied for large-sized ships and Active Front End (AFE) rectifiers have been utilized for small and medium-sized ships as a part of the system. In this paper, we design a large electric propulsion ship system using AFE rectifier with the proposed phase angle detector and verify the feasibility of the system by simulation. The phase angle derived from the proposed phase angle detection method is applied to the control of the AFE rectifier instead of the zero-crossing method used to detect the phase angle in the control of the conventional AFE rectifier. We compare and analyze the speed control, Direct Current (DC)-link voltage, harmonic content and measurement data of heat loss by inverter switch obtained from the simulation of the electric propulsion system with the 24-pulse DFE rectifier, the conventional AFE rectifier, and the proposed AFE rectifier. As a result of the simulation, it was confirmed that the proposed AFE rectifier derives a satisfactory result similar to that of a 24-pulse DFE rectifier with a phase shifting transformer installed according to the speed load of the ship, and it can be designed and applied as a rectifier of a large-sized vessel.

scholarly journals Comparison of Diesel-Electric with Hybrid-Electric Propulsion System Safety Using System-Theoretic Process Analysis

2019 ◽  
Author(s):  
V Bolbot ◽  
G Theotokatos ◽  
E Boulougouris ◽  
D Vassalos
Keyword(s):  
Electric Propulsion ◽  
Process Analysis ◽  
Hazard Analysis ◽  
Propulsion System ◽  
Cruise Ship ◽  
Propulsion Systems ◽  
Electric Propulsion System ◽  
Automation And Control ◽  
Hybrid Electric ◽  
And Control

Cruise ship industry is rapidly developing, with both the vessels size and number constantly growing up, which renders ensuring passengers, crew and ship safety a paramount necessity. Collision, grounding and fire are among the most frequent accidents on cruise ships with high consequences. In this study, a hazard analysis of diesel-electric and hybrid-electric propulsion system is undertaken using System-Theoretic Process Analysis (STPA). The results demonstrate significant increase in potential hazardous scenarios due to failures in automation and control systems, leading to fire and a higher number of scenarios leading to propulsion and power loss in hybrid-electric propulsion systems than on a conventional cruise-ship propulsion system. Results also demonstrate that STPA enhancement is required to compare the risk of two propulsion systems.

scholarly journals Validation of a Test Platform to Qualify Miniaturized Electric Propulsion Systems

Aerospace ◽  
2019 ◽  
Vol 6 (9) ◽  
pp. 99 ◽  
Author(s):  
Fabrizio Stesina
Keyword(s):  
Electric Propulsion ◽  
Can Bus ◽  
Propulsion System ◽  
Chemical Contamination ◽  
Propulsion Systems ◽  
Electric Propulsion System ◽  
Future Space ◽  
Test Platform ◽  
Electro Magnetic ◽  
Exchange Data

Miniaturized electric propulsion systems are one of the main technologies that could increase interest in CubeSats for future space missions. However, the integration of miniaturized propulsion systems in modern CubeSat platforms presents some issues due to the mutual interactions in terms of power consumption, chemical contamination and generated thermal and electro-magnetic environments. The present paper deals with the validation of a flexible test platform to assess the interaction of propulsion systems with CubeSat-technologies from mechanical, electrical, magnetic, and chemical perspectives. The test platform is a 6U CubeSat hosting an electric propulsion system and able to manage a variety of electric propulsion systems. The platform can regulate and distribute electric power (up to 60 W), exchange data according to several protocols (e.g., CAN bus, UART, I2C, SPI), and provide different mechanical layouts in 4U box completely dedicated to the propulsion system. Moreover, the data gathered by the onboard sensors are combined with the data from external devices and tools providing unprecedented information about the mutual behavior of a CubeSat platform and an electric propulsion system.

Sign in / Sign up

Export Citation Format

Share Document