Fundamentals of Electric Propulsion

Fundamentals of Electric Propulsion
Author: Dan M. Goebel,Ira Katz
Publsiher: John Wiley & Sons
Total Pages: 486
Release: 2008-12-22
ISBN: 9780470436264
Category: Technology & Engineering
Language: EN, FR, DE, ES & NL

Fundamentals of Electric Propulsion Book Excerpt:

Throughout most of the twentieth century, electric propulsion was considered the technology of the future. Now, the future has arrived. This important new book explains the fundamentals of electric propulsion for spacecraft and describes in detail the physics and characteristics of the two major electric thrusters in use today, ion and Hall thrusters. The authors provide an introduction to plasma physics in order to allow readers to understand the models and derivations used in determining electric thruster performance. They then go on to present detailed explanations of: Thruster principles Ion thruster plasma generators and accelerator grids Hollow cathodes Hall thrusters Ion and Hall thruster plumes Flight ion and Hall thrusters Based largely on research and development performed at the Jet Propulsion Laboratory (JPL) and complemented with scores of tables, figures, homework problems, and references, Fundamentals of Electric Propulsion: Ion and Hall Thrusters is an indispensable textbook for advanced undergraduate and graduate students who are preparing to enter the aerospace industry. It also serves as an equally valuable resource for professional engineers already at work in the field.

Electric Propulsion Development

Electric Propulsion Development
Author: Ernst Stuhlinger
Publsiher: Elsevier
Total Pages: 762
Release: 1963-01-01
ISBN: 0323163386
Category: Science
Language: EN, FR, DE, ES & NL

Electric Propulsion Development Book Excerpt:

Progress in Astronautics and Aeronautics, Volume 9: Electric Propulsion Development covers the proceedings of the Second Electric Propulsion Conference of the American Rocker Society, held in Berkeley, California on March 14-16, 1962. The conference focuses on the existing problems in electric propulsion and their possible solutions. This book is organized into four sections encompassing 35 chapters. The first section deals with the thermodynamics of arcs; the problems of heat and momentum transfer; the chemical processes within arcs; the arc system materials; and the arc jet design problems. The second section considers the problems of ion systems, the various ion sources, and the neutralization of ion beams. This section also looks into the basic ionization processes, the production and charging of heavy particles, the corrosive properties of cesium, and the ion-optical designs. The third section describes various plasma systems, including helical transmission lines, pulsed pinch accelerators, coaxial systems, and j x B accelerators. The theoretical analyses of these systems are briefly examined. The fourth section includes papers on flight testing of electric propulsion models, on vertical rocket probes, and on satellites, This section also discusses some advanced concepts in electric propulsion, such as air scooping during ascent through the atmosphere, systems design and optimization, and planetary and interplanetary missions. This book is of great value to physicists, space engineers and designers, as well as researchers in the fields of astronautics and aeronautics.

Physics of Electric Propulsion

Physics of Electric Propulsion
Author: Robert G. Jahn
Publsiher: Courier Corporation
Total Pages: 368
Release: 2012-12-19
ISBN: 0486138674
Category: Science
Language: EN, FR, DE, ES & NL

Physics of Electric Propulsion Book Excerpt:

Geared toward advanced undergraduates and graduate students, this text develops the concepts of electrical acceleration of gases for propulsion, from primary physical principles to realistic space thruster designs. 1968 edition.

Advances in Electric Propulsion

Advances in Electric Propulsion
Author: Jean L Broge
Publsiher: SAE International
Total Pages: 90
Release: 2017-05-18
ISBN: 0768084180
Category: Technology & Engineering
Language: EN, FR, DE, ES & NL

Advances in Electric Propulsion Book Excerpt:

Aviation propulsion development continues to rely upon fossil fuels for the vast majority of commercial and military applications. Until these fuels are depleted or abandoned, burning them will continue to jeopardize air quality and provoke increased regulation. With those challenges in mind, research and development of more efficient and electric propulsion systems will expand. Fuel-cell technology is but one example that addresses such emission and resource challenges, and others, including negligible acoustic emissions and the potential to leverage current infrastructure models. For now, these technologies are consigned to smaller aircraft applications, but are expected to mature toward use in larger aircraft. Additionally, measures such as electric/conventional hybrid configurations will ultimately increase efficiencies and knowledge of electric systems while minimizing industrial costs. Requirements for greater flight time, stealth characteristics, and thrust-to-power ratios adds urgency to the development of efficient propulsion methods for applications such as UAVs, which looks to technologies such as asymmetrical capacitors to enhance electric propulsion efficiency. This book will take the reader through various technologies that will enable a more-electric aircraft future, as well as design methods and certification requirements of more-electric engines.

Enhancing Space Transportation The NASA Program to Develop Electric Propulsion

Enhancing Space Transportation  The NASA Program to Develop Electric Propulsion
Author: Anonim
Publsiher: Unknown
Total Pages: 29
Release: 1990
ISBN: 1928374650XXX
Category: Space vehicles
Language: EN, FR, DE, ES & NL

Enhancing Space Transportation The NASA Program to Develop Electric Propulsion Book Excerpt:

Jet Rocket Nuclear Ion and Electric Propulsion

Jet  Rocket  Nuclear  Ion and Electric Propulsion
Author: W.H.T. Loh
Publsiher: Springer Science & Business Media
Total Pages: 766
Release: 2012-12-06
ISBN: 3642461093
Category: Technology & Engineering
Language: EN, FR, DE, ES & NL

Jet Rocket Nuclear Ion and Electric Propulsion Book Excerpt:

During the last decade, rapid growth of knowledge in the field of jet, rocket, nuclear, ion and electric propulsion has resulted in many advances useful to the student, engineer and scientist. The purpose for offering this course is to make available to them these recent advances in theory and design. Accordingly, this course is organized into seven parts: Part 1 Introduction; Part 2 Jet Propulsion; Part 3 Rocket Propulsion; Part 4 Nuclear Propulsion; Part 5 Electric and Ion Propulsion; Part 6 Theory on Combustion, Detonation and Fluid Injection; Part 7 Advanced Concepts and Mission Applications. It is written in such a way that it may easily be adopted by other universities as a textbook for a one semester senior or graduate course on the subject. In addition to the undersigned who served as the course instructor and wrote Chapter I, 2 and 3, guest lecturers included: DR. G. L. DUGGER who wrote Chapter 4 "Ram-jets and Air-Aug mented Rockets," DR. GEORGE P. SUTTON who wrote Chapter 5 "Rockets and Cooling Methods," DR . . MARTIN SUMMERFIELD who wrote Chapter 6 "Solid Propellant Rockets," DR. HOWARD S. SEIFERT who wrote Chapter 7 "Hybrid Rockets," DR. CHANDLER C. Ross who wrote Chapter 8 "Advanced Nuclear Rocket Design," MR. GEORGE H. McLAFFERTY who wrote Chapter 9 "Gaseous Nuclear Rockets," DR. S. G. FORBES who wrote Chapter 10 "Electric and Ion Propul sion," DR. R. H. BODEN who wrote Chapter 11 "Ion Propulsion," DR.

Interplanetary Probe Missions with Solar electric Propulsion Systems

Interplanetary Probe Missions with Solar electric Propulsion Systems
Author: Charles L. Zola
Publsiher: Unknown
Total Pages: 39
Release: 1969
ISBN: 1928374650XXX
Category: Interplanetary voyages
Language: EN, FR, DE, ES & NL

Interplanetary Probe Missions with Solar electric Propulsion Systems Book Excerpt:

Rarefied Gas Flows and Dynamic Plasma Phenomena in Electric Propulsion Systems

Rarefied Gas Flows and Dynamic Plasma Phenomena in Electric Propulsion Systems
Author: Juan Esteban Gomez Herrera
Publsiher: Cuvillier Verlag
Total Pages: 368
Release: 2020-12-01
ISBN: 3736963246
Category: Science
Language: EN, FR, DE, ES & NL

Rarefied Gas Flows and Dynamic Plasma Phenomena in Electric Propulsion Systems Book Excerpt:

Zu den aktuellen Entwicklungen in der Raumfahrtindustrie zählen das stetig wachsende Interesse an miniaturisierten Satelliten sowie der immer häufigere Einsatz elektrischer Antriebssysteme zu allgemeinen Lage- und Bahnregelungszwecken. Die Entwicklung miniaturisierter Satelliten erfordert ihrerseits den Einsatz von Antriebssystemen, die sehr kleine und präzise zu steuernde Schubkräfte erzeugen. Vor diesem Hintergrund stellen elektrische Triebwerke eine attraktive Option dar, die Antriebsanforderungen von Satelliten sowohl in herkömmlichen als auch in miniaturisierten Größen langfristig zu erfüllen. Bei miniaturisierten Satelliten sind die Schubanforderungen oft mit niedrigen Treibstoff-Massenstromwerten und verhältnismäßig kleinen geometrischen charakteristischen Längen verbunden. Dies kann zu verdünnten Gaszuständen innerhalb der Triebwerksdüsen führen. Wegen der hohen Komplexität der Plasmaphänomene innerhalb elektrischer Triebwerke sowie der typischerweise hohen Rechenanforderungen, die mit der Plasmamodellierung einhergehen, werden elektrische Antriebssysteme oft auf Basis empirischer Modelle und experimenteller Daten entwickelt. Der Fokus der vorliegenden Arbeit liegt auf den oben beschriebenen Herausforderungen und den dazugehörigen Forschungsfeldern: der Untersuchung verdünnter Gaszustände in transsonischen Strömungen sowie der Entwicklung numerischer Modellierungsansätze zur Beschreibung des Plasmaverhaltens innerhalb elektrischer Antriebssysteme. New trends regarding fundamental design approaches of orbital spacecraft have been developing in the space industry in recent years. They include an increased interest in miniaturized satellites as well as a general rise in the use of electric propulsion systems for orbit and attitude control. The successful implementation of miniaturized satellites requires the use of propulsion devices able to provide small and precise thrust and impulse levels. One technical solution able to meet the requirements of both standard-sized as well as miniaturized spacecraft involves the use of highly efficient and precise electric propulsion systems. In the particular case of miniaturized satellites, the propulsion requirements are often associated with low propellant mass flow rates and small characteristic geometrical lengths, potentially leading to the appearance of rarefied conditions inside the nozzles of the propulsion devices. Because of the high complexity of the plasma phenomena taking place inside such systems and the usually very high computational requirements associated with their numerical modelling, electric propulsion systems for space applications are usually designed based on empirical models and experimental data. The present work focuses on two key aspects outlined above: rarefied gas conditions in transonic micronozzle flows as well as the numerical modelling of plasma phenomena inside electric propulsion systems.

Electrical Plants and Electric Propulsion on Ships 2019

Electrical Plants and Electric Propulsion on Ships   2019
Author: Marco Giuffrida
Publsiher: Lulu.com
Total Pages: 352
Release: 2018-11-16
ISBN: 0244734399
Category: Electronic Book
Language: EN, FR, DE, ES & NL

Electrical Plants and Electric Propulsion on Ships 2019 Book Excerpt:

Electrical plants on-board modern cruise ships, offshore rigs and other naval vessels have nowadays reached a size and complexity comparable or even superior to big industrial plants and power plants.The continuous increase of the size of ships and the widely accepted adoption of electrical propulsion has led to the installation of HV (MV) power generation and distribution plants of very high power, tens of MW.Everybody who plans, manages or services these complex on-board power plants nowadays must have knowledge as well of HV plants and electrical machines, power converters, protection relays, of control and automation systems.This book intends to be an overview of technical features and planning issues of these electrical plants. It is meant to bear general validity, even if it is focused on larger ships with HV plants and electrical propulsion.

Electrical Plants and Electric Propulsion on Ships Extended Edition 2019

Electrical Plants and Electric Propulsion on Ships   Extended Edition 2019
Author: Marco Giuffrida
Publsiher: Lulu.com
Total Pages: 354
Release: 2018-11-14
ISBN: 024473352X
Category: Electronic Book
Language: EN, FR, DE, ES & NL

Electrical Plants and Electric Propulsion on Ships Extended Edition 2019 Book Excerpt:

Electrical plants on-board modern cruise ships, offshore rigs and other naval vessels have nowadays reached a size and complexity comparable or even superior to big industrial plants and power plants. The continuous increase of the size of ships and the widely accepted adoption of electrical propulsion has led to the installation of HV (MV) power generation and distribution plants of very high power, tens of MW. Everybody who plans, manages or services these complex on-board power plants nowadays must have knowledge as well of HV plants and electrical machines, power converters, protection relays, of control and automation systems. This book intends to be an overview of technical features and planning issues of these electrical plants. It is meant to bear general validity, even if it is focused on larger ships with HV plants and electrical propulsion.

Prospects for Nuclear Electric Propulsion Using Closed Cycle Magnetohydrodynamic Energy Conversion

Prospects for Nuclear Electric Propulsion Using Closed Cycle Magnetohydrodynamic Energy Conversion
Author: Anonim
Publsiher: DIANE Publishing
Total Pages: 135
Release: 2022
ISBN: 142891790X
Category: Electronic Book
Language: EN, FR, DE, ES & NL

Prospects for Nuclear Electric Propulsion Using Closed Cycle Magnetohydrodynamic Energy Conversion Book Excerpt:

Prospects for Nuclear Electric Propulsion Using Closed Cycle Magnetohydrodynamic Energy Conversion

Prospects for Nuclear Electric Propulsion Using Closed Cycle Magnetohydrodynamic Energy Conversion
Author: R. J. Litchford
Publsiher: Unknown
Total Pages: 56
Release: 2001
ISBN: 1928374650XXX
Category: Electric power production
Language: EN, FR, DE, ES & NL

Prospects for Nuclear Electric Propulsion Using Closed Cycle Magnetohydrodynamic Energy Conversion Book Excerpt:

Design and comparison of two brushless DC drives for an electric propulsion system of solar power unmanned aerial vehicles

Design and comparison of two brushless DC drives for an electric propulsion system of solar power unmanned aerial vehicles
Author: Dong, Rong
Publsiher: Universitätsverlag der TU Berlin
Total Pages: 130
Release: 2020-08-26
ISBN: 379833126X
Category: Technology & Engineering
Language: EN, FR, DE, ES & NL

Design and comparison of two brushless DC drives for an electric propulsion system of solar power unmanned aerial vehicles Book Excerpt:

The electrical propulsion system as the core component of solar-power Unmanned Aerial Vehicles (UAVs) for long duration flight requires high power density and stable drive technology. Brushless DC motors (BLDCM) with high power and torque density and control algorithms suitable for drive system are given preference for the application in UAVs. This dissertation is aimed at designing an improved BLDCM using only 4 interior magnet blocks to realize 8 poles compared to the conventional 8 magnet blocks structure. The performances of both BLDCM designs have been analytically determined and the motor models were verified through finite element software in ANSYS. Design and construction of the demonstrators of BLDCMs with the proposed and the conventional magnet structure have been carried out and a test bench for extensive performance comparison has been set up. Since the proposed magnet structure leads to a particularity of the magnetic circuit, the behavior of absolute and differential synchronous direct and quadrature inductances have been investigated by finite element model analysis and experiments. Efficiency maps were generated and thermal characteristics have been measured to gain a comprehensive understanding of the two motors. To reduce the uncertainty of sensor control for BLDCM, a high speed, good linearity analog isolation circuit to measure the voltages of 270 V DC voltage to realize sensorless control strategy has been designed. The circuit combines a PI controller with fast operational amplifiers with a built-in linearizing feedback photodiode loop of a linear optocoupler. A 3D stator model was built to analyse the mechanical resonance frequencies and possible excitation by the electromagnetic radial force leading to vibration and noise for the proposed and conventional rotor structure. Analytical calculation of natural mode frequencies has also been conducted to compare and validate the accuracy of FEM simulations and impact hammer testing experimental results. Das elektrische Antriebssystem als Kernkomponente von unbemannten Solarflugzeugen (UAVs, Unmanned Aerial Vehicles) für Langzeitflüge erfordert eine hohe Leistungsdichte und robuste Antriebstechnik. Bürstenlose Gleichstrommotoren (BLDCM) mit hoher Leistungs- und Drehmomentdichte sowie dafür angepasste Regelalgorithmen werden daher bevorzugt in UAVs eingesetzt. Diese Dissertation zielt darauf ab, einen verbesserten BLDCM mit nur 4 eingebetteten Magnetblöcken zu entwerfen, um 8 Pole zu realisieren im Vergleich zu der herkömmlichen Struktur mit 8 Magnetblöcken. Das Verhalten beider BLDCM-Designs wurde analytisch ermittelt und die Motormodelle mit Hilfe von Finite-Elemente-Software in ANSYS verifiziert. Design und Konstruktion der Prototypen mit der vorgeschlagenen und der herkömmlichen Magnetstruktur wurden durchgeführt und es wurde ein Prüfstand für einen umfassenden Leistungsvergleich aufgebaut. Da die vorgeschlagene Magnetstruktur zu einem Magnetkreis führt, bei dem die entgegengesetzten Pole keine Spiegelsymmetrie aufweisen, wurden die Längs- und Querinduktivität durch Finite-Elemente-Modellanalyse und Experimente absolut und differentiell untersucht. Weiterhin wurden Wirkungsgradkennfelder erstellt und das thermische Verhalten untersucht, um ein umfassendes Verständnis der beiden Motoren zu erhalten. Um das sensorbedingte Ausfallrisiko zu eliminieren, wurde eine schnelle analoge Isolationsschaltung mit hoher Linearität und Stabilität zur Messung der gepulsten Spannungen bei 270V Gleichspannung entwickelt, um eine sensorlose Steuerungsstrategie zu realisieren. Die Schaltung verwendet einen linearen Optokoppler mit integrierter Rückkopplungsfotodiode, sowie einen PI-Regler mit schnellen Operationsverstärkern im Rückkopplungspfad. Ein 3D-Statormodell wurde erstellt, um die mechanischen Resonanzfrequenzen und die mögliche Anregung durch die elektromagnetische Radialkraft zu analysieren, die zu Vibrationen und Geräuschen bei der vorgeschlagenen und herkömmlichen Rotorstruktur führt. Es wurde auch eine analytische Modalanalyse durchgeführt, um die Genauigkeit von FEM-Simulationen und experimentellen Ergebnissen mit dem Impulshammer zu vergleichen und zu validieren.

Electric Propulsion Mission Analysis Terminology Nomenclature

Electric Propulsion Mission Analysis  Terminology   Nomenclature
Author: Nuclear Electric Propulsion Systems Analysis Task Group
Publsiher: Unknown
Total Pages: 28
Release: 1969
ISBN: 1928374650XXX
Category: Space vehicles
Language: EN, FR, DE, ES & NL

Electric Propulsion Mission Analysis Terminology Nomenclature Book Excerpt:

Summary and Recommendations on Nuclear Electric Propulsion Technology for the Space Exploration Initiative

Summary and Recommendations on Nuclear Electric Propulsion Technology for the Space Exploration Initiative
Author: Anonim
Publsiher: Unknown
Total Pages: 120
Release: 1993
ISBN: 1928374650XXX
Category: Electronic Book
Language: EN, FR, DE, ES & NL

Summary and Recommendations on Nuclear Electric Propulsion Technology for the Space Exploration Initiative Book Excerpt:

Ion Propulsion

Ion Propulsion
Author: George Raymond Brewer
Publsiher: Gordon & Breach Publishing Group
Total Pages: 552
Release: 1970
ISBN: 1928374650XXX
Category: Ion rockets
Language: EN, FR, DE, ES & NL

Ion Propulsion Book Excerpt:

Introduction to Satellite Communication

Introduction to Satellite Communication
Author: Bruce R. Elbert
Publsiher: Artech House
Total Pages: 447
Release: 2008
ISBN: 1596932112
Category: Technology & Engineering
Language: EN, FR, DE, ES & NL

Introduction to Satellite Communication Book Excerpt:

The book covers all the fundamentals of satellites, ground control systems, and earth stations, considering the design and operation of each major segment. You gain a practical understanding of the basic construction and usage of commercial satellite networksOCohow parts of a satellite system function, how various components interact, which role each component plays, and which factors are the most critical to success."

32nd AIAA ASME SAE ASEE Joint Propulsion Conference Exhibit

32nd AIAA ASME SAE ASEE Joint Propulsion Conference   Exhibit
Author: Anonim
Publsiher: Unknown
Total Pages: 552
Release: 1996
ISBN: 1928374650XXX
Category: Airplanes
Language: EN, FR, DE, ES & NL

32nd AIAA ASME SAE ASEE Joint Propulsion Conference Exhibit Book Excerpt:

31st AIAA ASME SAE ASEE Joint Propulsion Conference and Exhibit

31st AIAA ASME SAE ASEE Joint Propulsion Conference and Exhibit
Author: Anonim
Publsiher: Unknown
Total Pages: 542
Release: 1995
ISBN: 1928374650XXX
Category: Airplanes
Language: EN, FR, DE, ES & NL

31st AIAA ASME SAE ASEE Joint Propulsion Conference and Exhibit Book Excerpt:

34th AIAA ASME SAE ASEE Joint Propulsion Conference Exhibit

34th AIAA ASME SAE ASEE Joint Propulsion Conference   Exhibit
Author: Anonim
Publsiher: Unknown
Total Pages: 470
Release: 1998
ISBN: 1928374650XXX
Category: Airplanes
Language: EN, FR, DE, ES & NL

34th AIAA ASME SAE ASEE Joint Propulsion Conference Exhibit Book Excerpt: