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More Attitude Control Thruster Options

More Attitude Control Thruster Options

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More Attitude Control Thruster Options

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  1. More Attitude Control Thruster Options Brittany Waletzko Translunar/OTV Phase Week 7 Brittany Waletzko - ATT

  2. The Scenario BrittanyWaletzko- ATT Need thrusters to despin/desaturate reaction wheels during TLI Must be capable of impulsive ΔV ~50 m/s Already using Electric Propulsion for main engine  utilize power for attitude control? <1>

  3. Bottom-Line Figures (hydrazine monopropellant system uses <1W) Bottom line: Neither of these options is likely to be the best option based on cost, power consumption, and complexity Future Work: Solidifying supporting hardware mass/power/cost figures, OTV integration work BrittanyWaletzko- ATT <2>

  4. Questions? BrittanyWaletzko- ATT <3>

  5. Thruster Locations and Thrust Direction Vectors Thruster placement planned with assistance from Brian Erson Brittany Waletzko - ATT <4>

  6. How They Work Source: TU Delft website Brittany Waletzko - ATT <5>

  7. Further Comments Brittany Waletzko - ATT <6>

  8. Updated System Estimates 8 thrusters may be too redundant; 4 already allows for the loss of one thruster, 8 makes the entire system redundant  reliability analysis needed Brittany Waletzko - ATT <7>

  9. Primary References Monopropellant Hydrazine Thrusters. Astrium Space Propulsion. 21 Jan 2009. <http://cs.astrium.eads.net/sp/SpacecraftPropulsion/MonopropellantThrusters.html> Rocket Research Corporation. "Final Report for Monopropellant Hydrazine Thruster System," 1965. http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19670030394_1967030394.pdf Eric Wernimont, Ph.D. General Kinetics, Inc.: Huntington Beach, CA. Email Correspondence 7 Feb - 10 Feb 2009. <http://www.marotta.com/DataSheets/MV100series.htm> <http://www.circlesealcontrols.com/products/atkomatic_valves/pdf/cscatkoc_2007-10_lo.pdf> “Electrothermal Hydrazine Data” and many other links <http://www.lr.tudelft.nl/live/pagina.jsp?id=6cf1d7c6-dd9a-432b-b40e-02f4f8ed0d0d&lang=en> Sellers, “Investigation Into Cost-Effective Propulsion System Options for Small Satellites.” Journal of Reducing Space Mission Cost, 1998. Pinero and Bowers. “Power Electronics for a Miniaturized Arcjet.” 32nd Joint Propulsion Conference and Exhibit,” 1996. BrittanyWaletzko- ATT <8>