Download or read book Characterization and Improvement of Thrust Balance Measurement Technique for SX3 Applied Field Magnetoplasmadynamic Thruster written by Akash Mankar and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Steady state applied-field magnetoplasmadynamic thruster promises good compromise between thrust density and specific impulse, making them relevant for interplanetary missions requiring high thrusts. The IRS 100 kW gas-fed steady-state AF-MPD SX3 thruster has shown promising results in previous held test campaigns. Experimental results in those campaigns showed non-linear behavior of tare forces, resulting in respective error in the thrust measurement and this error then propagates in further calculation of Isp, thrust efficiency, etc. This motivated improvement in the thrust balance and measurement technique. Various error sources in the thrust measurement technique were identified and solutions to mitigate them were presented. A number of changes in the thrust balance were made in order to improve the measurement technique and data quality. The effectiveness of improvements had been experimentally characterized and presented. Previously the thrust measurement technique featured manual control of the measurement setup which led to complex and inconsistent test procedures. A new programmable electronic control unit was specifically designed for more consistent and automated measurement and calibration procedure. Potential error sources of the measurement chain have been systematically identified, characterized and discussed. The analysis tool for thrust characterization was redesigned which gives fine control of the interval selection and data export, this ensured accurate thrust and calibration calculations. The new code is more modular to adapt for changes and is very flexible with user interaction reducing complexity while still retaining the functionality. To further improve the measurements accuracy some suggestions are made.

Download or read book Experimental Characterization of Steady State Applied Field Magnetoplasmadynamic Thruster SX3 written by Joan Albert [Verfasser] Miralles Pascual and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The apparatus for experimental research on AF-MPD at the Institute of Space Systems has been improved and characterized. In the process, significant changes have been done with respect previous experimental campaigns with regard to safety, long term operation and accuracy. These modifications include a refurbishment of the electric and water circuits inside and outside the tank as well as preventing arc attachment points. Once the setup was assembled, it needed to be characterized in order to assess what are the sources of disturbances for the evaluation of electromagnetic thrust. This was done in one long experimental campaign in which the gas dynamic thrust was measured, the external magnetic field was mapped downstream the thruster and the dynamics of the thrust balance was studied. It was found that the dynamic expansion of the gas might generate a subtle thrust component that increases with the mass flow rate through the cathode. The map of the magnetic field was compared with numerical simulations from a FEMM model, showing good agreement. Moreover, a device to simulate the arc discharge current on the thruster was designed, but could not be put into operation due to time constraints. During preliminary ignition tests, the SX3 was operated at a power level of 19.6 kW in steady state regime and a magnetic field intensity up to 140 mT. This experiment revealed instabilities in the arc discharge at low current levels. The analysis of the data, together with the characterization of the setup, lead to the development of a measurement procedure that aims to determine the thrust generated by the SX3. The work done in this thesis opens the door for an extensive experimental campaign in which the performance of the thruster SX3 can be comprehensively assessed and described.*****The apparatus for experimental research on AF-MPD at the Institute of Space Systems has been improved and characterized. In the process, significant changes have been done with respect previous experimental campaigns with regard to safety, long term operation and accuracy. These modifications include a refurbishment of the electric and water circuits inside and outside the tank as well as preventing arc attachment points. Once the setup was assembled, it needed to be characterized in order to assess what are the sources of disturbances for the evaluation of electromagnetic thrust. This was done in one long experimental campaign in which the gas dynamic thrust was measured, the external magnetic field was mapped downstream the thruster and the dynamics of the thrust balance was studied. It was found that the dynamic expansion of the gas might generate a subtle thrust component that increases with the mass flow rate through the cathode. The map of the magnetic field was compared with numerical simulations from a FEMM model, showing good agreement. Moreover, a device to simulate the arc discharge current on the thruster was designed, but could not be put into operation due to time constraints. During preliminary ignition tests, the SX3 was operated at a power level of 19.6 kW in steady state regime and a magnetic field intensity up to 140 mT. This experiment revealed instabilities in the arc discharge at low current levels. The analysis of the data, together with the characterization of the setup, lead to the development of a measurement procedure that aims to determine the thrust generated by the SX3. The work done in this thesis opens the door for an extensive experimental campaign in which the performance of the thruster SX3 can be comprehensively assessed and described.

Download or read book Pamphlets on Ethnic Relations in Russia written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Space Nuclear Propulsion for Human Mars Exploration written by National Academies of Sciences Engineering and Medicine and published by . This book was released on 2021-11-12 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Space Nuclear Propulsion for Human Mars Exploration identifies primary technical and programmatic challenges, merits, and risks for developing and demonstrating space nuclear propulsion technologies of interest to future exploration missions. This report presents key milestones and a top-level development and demonstration roadmap for performance nuclear thermal propulsion and nuclear electric propulsion systems and identifies missions that could be enabled by successful development of each technology.

Download or read book Advanced Space Propulsion Systems written by Martin Tajmar and published by Springer Science & Business Media. This book was released on 2012-09-08 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: Space propulsion systems have a great influence on our ability to travel to other planets or how cheap a satellite can provide TV programs. This book provides an up-to-date overview of all kinds of propulsion systems ranging from classical rocket technology, nuclear propulsion to electric propulsion systems, and further to micro-, propellantless and even breakthrough propulsion, which is a new program under development at NASA. The author shows the limitations of the present concepts and how they could look like in the future. Starting from historical developments, the reader is taken on a journey showing the amazing technology that has been put on hold for decades to be rediscovered in the near future for questions like how we can even reach other stars within a human lifetime. The author is actively involved in advanced propulsion research and contributes with his own experience to many of the presented topics. The book is written for anyone who is interested in how space travel can be revolutionized.

Download or read book Design of Rotating Electrical Machines written by Juha Pyrhonen and published by John Wiley & Sons. This book was released on 2013-09-26 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt: In one complete volume, this essential reference presents an in-depth overview of the theoretical principles and techniques of electrical machine design. This timely new edition offers up-to-date theory and guidelines for the design of electrical machines, taking into account recent advances in permanent magnet machines as well as synchronous reluctance machines. New coverage includes: Brand new material on the ecological impact of the motors, covering the eco-design principles of rotating electrical machines An expanded section on the design of permanent magnet synchronous machines, now reporting on the design of tooth-coil, high-torque permanent magnet machines and their properties Large updates and new material on synchronous reluctance machines, air-gap inductance, losses in and resistivity of permanent magnets (PM), operating point of loaded PM circuit, PM machine design, and minimizing the losses in electrical machines> End-of-chapter exercises and new direct design examples with methods and solutions to real design problems> A supplementary website hosts two machine design examples created with MATHCAD: rotor surface magnet permanent magnet machine and squirrel cage induction machine calculations. Also a MATLAB code for optimizing the design of an induction motor is provided Outlining a step-by-step sequence of machine design, this book enables electrical machine designers to design rotating electrical machines. With a thorough treatment of all existing and emerging technologies in the field, it is a useful manual for professionals working in the diagnosis of electrical machines and drives. A rigorous introduction to the theoretical principles and techniques makes the book invaluable to senior electrical engineering students, postgraduates, researchers and university lecturers involved in electrical drives technology and electromechanical energy conversion.

Download or read book Performance Evaluation of the SPT 140 written by and published by . This book was released on 1997 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Report of the Commission to Assess United States National Security Space Management and Organization written by and published by . This book was released on 2001 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Commission was directed to assess the organization and management of space activities in support of U.S. national security.

Download or read book Propulsion Techniques written by Peter J. Turchi and published by AIAA. This book was released on 1998 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Drawn from early volumes of Aerospace America and its antecedents, this book rescues the insights, concerns, and dreams of dozens of space propulsion experts for the next generation of aerospace scientists and engineers. Written by well-known figures in space propulsion, this book provides readily accessible source material for design courses in astronautical engineering. Propulsion Techniques surveys the technologies of rocketry in the traditional categories of liquid, solid, hybrid, nuclear, and electric propulsion. Historical trends and cycles are displayed in each category as articles describe concepts and progress from the early visions of Goddard, Oberth, and Tsiolkovsky to proposed (and re-proposed) ideas for advanced space thrusters. In addition to descriptions of rocket engines of various types, associated technologies for propellants and space-electrical power systems are discussed.

Download or read book Understanding Space written by Jerry Jon Sellers and published by AIAA (American Institute of Aeronautics & Astronautics). This book was released on 1994 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: To understand orbits, spacecraft, and all the other elements that make up the fascinating field of astronautics -- just turn the pages of this book.

Download or read book The Satellite Communication Applications Handbook written by Bruce R. Elbert and published by Artech House. This book was released on 2004 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the publication of the best-selling first edition of The Satellite Communication Applications Handbook, the satellite communications industry has experienced explosive growth. Satellite radio, direct-to-home satellite television, satellite telephones, and satellite guidance for automobiles are now common and popular consumer products. Similarly, business, government, and defense organizations now rely on satellite communications for day-to-day operations. This second edition covers all the latest advances in satellite technology and applications including direct-to-home broadcasting, digital audio and video, and VSAT networks. Engineers get the latest technical insights into operations, architectures, and systems components.

Download or read book Superconducting Technology written by Kristian Fossheim and published by World Scientific. This book was released on 1991 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains an interdisciplinary selection of timely articles which cover a wide range of superconducting technologies ranging from high tech medicine (10-12 Gauss) to multipurpose sensors, microwaves, radio engineering, magnet technology for accelerators, magnetic energy storage, and power transmission on the 109 watt scale. It is aimed primarily at the non-specialist and will be suitable as an introductory course book for those in the relevant fields and related industries. As shown in the title several examples of high-c applications are included. While low-Tc is still the leading technology, for instance, in cables and SQUIDS, case studies in these areas are presented.

Download or read book Space Propulsion Analysis and Design written by Ronald Humble and published by Learning Solutions. This book was released on 1995-09-01 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The only comprehensive text available on space propulsion for students and professionals in astronautics.

Download or read book Handbook of Small Satellites written by Joseph N. Pelton and published by Springer. This book was released on 2020-09-13 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the past decade, the field of small satellites has expanded the space industry in a powerful way. Hundreds, indeed thousands, of these innovative and highly cost-efficient satellites are now being launched from Earth to establish low-cost space systems. These smallsats are engaged in experiments and prototype testing, communications services, data relay, internet access, remote sensing, defense and security related services, and more. Some of these systems are quite small and are simple student experiments, while others in commercial constellations are employing state-of-the-art technologies to deliver fast and accurate services. This handbook provides a comprehensive overview of this exciting new field. It covers the technology, applications and services, design and manufacture, launch arrangements, ground systems, and economic and regulatory arrangements surrounding small satellites. The diversity of approach in recent years has allowed for rapid innovation and economic breakthroughs to proceed at a pace that seems only to be speeding up. In this reference work, readers will find information pertaining to all aspects of the small satellite industry, written by a host of international experts in the field.

Download or read book Saturn Rukh written by Robert L. Forward and published by Tor Science Fiction. This book was released on 1998-04-15 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the near future five intrepid men and women have been paid a billion dollars each to risk the first voyage into the upper atmosphere of Saturn. The goal: to convert atmospheric chemicals into fuel to power interplanetary spaceships. But no one anticipates a crash landing on one of the enormous flying creatures known as rukhs that live in Saturn's atmosphere.

Download or read book Test Cell A Shielding Study written by P. K. Lee and published by . This book was released on 1963 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Rocket Engine Reactor written by Anatoly Lanin and published by Springer Science & Business Media. This book was released on 2012-10-17 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph recounts and details the development of a nuclear rocket engine reactor (NRER). In particular, it explains the working capacity of an active zone NRER under mechanical and thermal load, intensive neutron fluxes, and high-energy generation (up to 30 MBT/l) in a working medium (hydrogen) at temperatures up to 3100 K. The design principles and bearing capacity of reactors area discussed on the basis of simulation experiments and test data of a prototype reactor. Property data of dense constructional, porous thermal insulating and fuel materials such as carbide and uranium carbide compounds in the temperatures interval 300 - 3000 K are presented.; technological aspects of strength and thermal strength resistance of materials are also considered. As well, a procedure to design possible emergency processes in the NRER is developed and risks for their origination are evaluated. Finally, prospects for use in pilotless space devices and piloted interplanetary ships are reviewed.