3 edition of Power electronics development for the SPT-100 thruster found in the catalog.
Power electronics development for the SPT-100 thruster
1993 by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, DC, Springfield, Va .
Written in English
|Statement||John A. Hamley, Gerald M. Hill, and John M. Sankovic.|
|Series||NASA technical memorandum -- 106488.|
|Contributions||Hill, Gerald M., Sankovic, John M., United States. National Aeronautics and Space Administration.|
|The Physical Object|
In addition, the HiVHAc project is also pursuing the development of a power processing unit (PPU) and xenon feed system (XFS) for integration with the HiVHAc engineering development unit thruster. Colorado Power Electronics and NASA Glenn Research Center have tested a brassboard PPU for more than 1, hours in a vacuum environment, and a new. A Multiple-Cathode, High-Power, Rectangular Ion Thruster Discharge Chamber for Increasing Thruster Lifetime. Free essays, homework help, flashcards, research papers, book reports, term papers, history, science, politics. Calculations for the SPT thruster that use the published cross sections are presented in the following sections. These calculations show that, even with the decrease of the effective Bohm coefﬁcient to in the channel region, the code shows an increase in the ion current by 8% and a reduction in the channel electron current by 25%.
Personality measures in admissions
So the loud torrent
Numerical comparison of methods for solving matrix equations in stability theory.
Library Focus, Improved News Coverage in the Technical Library, Vol. 10, No. 4, U.S. General Accounting Office, July/August (Microfiche)
2006 Title 49 - Transportation (Parts 400-599)
Profesor E. J. Doneckens system and illustrated treatise on the most obvious and complicated diseases and blemishes to which the equine family is peculiarly subject ...
How to give yourself relief from pain by the simple pressure of a finger
Get this from a library. Power electronics development for the SPT thruster. [John A Hamley; Gerald M Hill; John M Sankovic; United States. National Aeronautics and Space Administration.]. SPT is a Hall-effect ion thruster, part of the SPT-family of stands for Stationary Plasma creates a stream of electrically charged xenon ions accelerated by an electric field and confined by a magnetic field.
Thruster is manufactured by Russian OKB Fakel, and was first launched onboard Gals-1 satellite in In Fakel debuted a second generation of the. The SPTB thruster is the basic design variant of the SPTD. Several tasks were solved during development of the design of the new thruster.
In particular, the magnetic system has been optimized to reach the required thrust, specific and life time characteristics of the thruster and to ensure the discharge power operating range. In spacecraft propulsion, a Hall-effect thruster (HET) is a type of ion thruster in which the propellant is accelerated by an electric field.
Hall-effect thrusters use a magnetic field to limit the electrons' axial motion and then use them to ionize propellant, efficiently accelerate the ions to produce thrust, and neutralize the ions in the -effect thrusters (based on the discovery.
Additional, time resolved measurements were taken along the centerline of the thruster (R = 0) and along the discharge channel centerline (R = 5 mm). SPT Hall Thruster Figure 1 provides an image of the SPT Hall thruster operating, as well as a schematic of the thruster.
Existing technological fundamentals and potential development paths. Every electric propulsion system is based on key components that make the concept work.
The most important components are the energy storage device (battery system), 2 the electric machine, the power electronics, and a suitable charging device.
• NASA’s Solar Electric Propulsion Technology Demonstration Mission (SEP TDM) • NASA GRC & JPL High Power Hall Thruster Technolo gy Development • Overview of the NASAMS design and testing • kW Hall thruster design and modeling • kW Hall thruster functional tests • kW thruster planned tests • Summary.
“Very High-Power Hall-Effect Thruster for Exploration”, SITAEL is developing, designing, manufacturing and testing a new 20kW class Hall effect thruster, the HT20k, together with the associated high current hollow cathode, the HC This paper provides the description of the development approach and the status of the Size: KB.
SPT/Bi-prop 12 hrs. by SPT 2 per day by SPT A few seconds by a Bi-prop 2 per day by a Bi-prop Orbit Control Maneuvering of chemical and Hybrid GEO satellites 19 MBSAT: DBS communications satellite for Japan and Korea built by SS/L, The first US-built satellite with SPT T he SPT is a Hall-effect thruster designed and built in Russia by the Experimenta l Design B ureau Fakel which has over 15 years of o n orbit flight heritage on Russian spacecraft with this.
Space Systems/Loral has implemented the SPT Hall effect thruster onto geostationary spacecraft for primary north-south station keeping, allowing substantial reductions in onboard propellant : Martin Tajmar. Carl Book, Mitchell Walker, “Effect of Anode Temperature on Hall Effect Thruster Performance,” Journal of Propulsion and Power, Vol Number 5, September-Octoberpp.
The W-class ISCTv2 Hall Thruster (HT) has been characterized in terms of far-field plume properties. By means of a Faraday Cup and a Retarding Potential Analyzer, both the ion current density and the ion energy distribution function have been measured over a ∘ circular arc for different operating points.
Measurements are compared to far-field plume characterizations performed. Impulse Two-Stage Hall Thruster with Plasma Lens Focusing. In the following, a review of two-stage HETs, plasma lens focusing, and the use of trim coils is discussed.
The implementation of these concepts in the development of the P is then presented, followed by a brief review of the performance and plume characteristics of the thruster to. By examining a range of thruster sizes and operating conditions,9,10 11 we are able to make modeling predictions.
One of the most important parameters for this study is the curve of thruster power in terms of the specific impulse (I sp). As specific impulse increases, the discharge voltage will increase as well. The Hall thruster power is Cited by: designs, develops and produces Power Processing Unit (PPU) to supply Hall Effect Thrusters: SPT from Fakel and PPSG from Snecma.
The first qualification model, developed for the 50V bus Stentor program, has supplied during hours an SPT thruster in a vacuum chamber simulating space by: 4. 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. of 1 Newton of thrust at elevated power levels. Development of a Hall thruster capable of operating at seconds at power levels of 50 kilowatts and above requires a thruster design which preserves the physical processes required for efficient ionization and acceleration of the propellant.
Important characteristics for preservation. Together, they make 60% of the industry-wide insurance claims for in-orbit operational defects.
The author, a recognized expert in the industry, has written this book to provide reliable information on a variety of subjects to engineers and managers involved in spacecraft power systems design, development, testing, and operation. Improved Superconducting Magnet System to Reduce Upstream Boundary Power Losses in a Helicon Plasma Thruster.
John J. Vitucci and; High-Temperature Sensor and Electronics Packaging Technologies for Distributed Engine Controls. Numerical Modeling Approaches in Hybrid Rocket Motor Development • Monday, 28 July • hrs. Q&A for spacecraft operators, scientists, engineers, and enthusiasts. Stack Exchange network consists of Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Visit Stack Exchange. A second approach would be to use a moderate-thrust ( lb), modest-performance chemical propulsion thruster at sec I sp, such as liquid oxygen (LOx)/monopropellant hydrazine using a cryocooler to keep the LOx from boiling ty changes of hundreds of feet per second can be achieved in minutes to hours, depending on the propellant mass available, for platforms of thousands.
Journal of Propulsion and Power; Journal of Spacecraft and Rockets; SPT subsystem development status and plan. Day, N. Maslennikov and; W. Rogers; Cyclic endurance test of a SPT stationary plasma thruster.
Charles Garner, John Brophy, James Polk and; Lewis Pless. 4, Intelsat 10 is realized by SPT (Fakel EDB, Russia). The first American HET in space (16 Dec.
) was the BHT from Busek Co. United States (T= mN, Isp= s) on the TacSat-2 technological spacecraft. Power, thrust and specific impulse above-mentioned are nominal performances. BASIC CONCEPT OF HALL EFFECT THRUSTER. A xenon micro flow control device (XMFCD) is the key component of a xenon feeding system, which controls the required micro flow xenon (µg/s–mg/s) to electric thrusters.
Traditional XMFCDs usually have large volume and weight in order to achieve ultra-high fluid resistance and have a long producing cycle and high processing cost. This paper proposes a miniaturized, easy-processing Author: Chang-Bin Guan, Yan Shen, Zhao-Pu Yao, Zhao-Li Wang, Mei-Jie Zhang, Ke Nan, Huan-Huan Hui.
The SPT typically provides 80 mN thrust at an Isp of s and 48% efficiency with an input power of kW. A SPT has been laboratory tested down to W with an Isp of s and efficiency of 21% (Manzella ). At the design point of kW, the SPT operated at an Isp of s and an efficiency of 32%.
Research and Development of Low-Power and High-Power Three-Types Hall Thrusters at Osaka Institute of Technology View Section, Experimental Performance Characterization of a Novel Direct Current Cold Cathode Neutralizer for Electric Thruster Applications.
Development and Test of the Negative and Positive Ion Thruster PEGASES. View Section, Downstream Flow Analysis of High-Power Helicon Double Gun Thruster with Application to Spacecraft Propulsion Systems. View Section, The Effect of Background Pressure on SPT Hall Thruster Performance.
View Section. Starting from that year more then Hall thruster have been used in space. Subsequently Hall engine of different power and size were developed with the introduction of the SPT and SPT.
The modelling of the Hall thruster SPT is a very important issue in view of the increasing importance of such propulsion devices in space applications.
Only kinetic models can investigate the rich variety of physical mechanisms involved in the Hall discharge and in the plume emitted from the thruster.
The development and qualification of a kW Hall thruster propulsion system for GEO satellite applications – status update. Paper presented at the 28th international electric propulsion conference, Toulouse, France, Google ScholarCited by: 4. ElectraTone Guitar Effects Arts Development Council of Georgia's Podcast Engaged.
Meaningful Learning 行政長官選舉辯論 IPA JOURNAL Performance Engineering of Software Systems Alf’s motivation and mini sermons for yes even you. He received a B.S. in Mechanical Engineering from the Illinois Institute of Technology inan M.S. and Ph.D. in Mechanical Engineering from Colorado State University (CSU) inand He led the evaluation in Russia of the SPT Hall thruster developed by the Soviet Union.
Full text of "DTIC ADA 5TH International Symposium: Small Satellites Systems and Services" See other formats. Hall-effect thrusters (HETs) are one of the most successful technologies used to electrically generate thrust for satellites.
The first in-space demonstration of electric propulsion (EP) was made by an ion engine in aboard the SERT-1 spacecraft , followed by the first HET in aboard the USSR Meteor satellite .Since then numerous satellites have been successfully operated using Cited by: Astronatix's Intelsat 39 lists the two engines SPT Stechkin kW Hall thruster.
R-4D Marquardt N2O4/MMH rocket engine. Question: Why is this combination on Intelsat 39 called "hybrid". Further development led to suits used on the U-2 and Space Shuttle in the 's.
S - American pressure suit, operational A, FA and SR full pressure suit; integrated subsystems, parachute harness, automatic flotation system, urine collection device, redundant pressure control and breathing system, thermal protective garment.
Commercial Hall Thruster Systems for Medium Power Spacecraft James J. Szabo; Bruce Pote; Lawrence Byrne; Rachel Tedrake; Ge Kolencik; Surjeet Paintal; Douglas Spence View Presentation Experimental Investigation of a Direct-Drive Hall Thruster and Solar A Power Levels up to 10 kW John S.
Snyder; John R. Brophy; Richard R. Hofer; Dan M. Goebel. The "MINOTOR" H project for ECR thruster development The Conquest of Space: un curso MOOC y SPOC en ingeniería aeroespacial The Project: towards a fully passive and consumable-less deorbit kit based on low work-function tether technology.
The cathode heater power supply and igniter were derived from ongoing development projects. No attempts were made to augment thruster electromagnet current in this effort.
The power electronics successfully started and operated the SPT thruster in performance tests at NASA Lewis, with minimal oscillations in the discharge current.
The. FINAL PROGRAM Lead Government Sponsor Spacecraft Power Electronics Design and Performance AIAA AIAA AIAA Feasible Study on Low Frequency Development of a 90% One Newton thruster by Development of MonoPlasma Jet as Ignition System for Hydrogen Peroxide Monoplasma-assisted combustion of Propellant.Characteristics and Performances of a W Hall Thruster for Microspacecraft auteur Stéphane Mazouffre, Lou Grimaud article IEEE Transactions on Plasma Science, Institute of Electrical and Electronics Engineers,46 (2), pp /TPS Accès au bibtex titre.The first qualification model, developed for the 50V bus Stentor program, has supplied during hours an SPT thruster in a vacuum chamber simulating space environment.
Qualified for the Spacebus platform, with a V regulated bus, the SB PPU and Filter Unit EQM have cumulated hours ground operation with a PPSG thruster.