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Cubesat Deorbiting Device Midterm Presentation

Cubesat Deorbiting Device Midterm Presentation. Joshua Laub Jake Tynis Lindsey Andrews Advisor: Dr. Robert Ash. What is a CubeSat?. Small, lightweight satellites Size = 10 cm cube (1 U up to 3U) Total Mass < 1 kg Orbital altitudes as great as 900 km (ISS is about 350 km)

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Cubesat Deorbiting Device Midterm Presentation

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  1. CubesatDeorbiting DeviceMidterm Presentation Joshua Laub Jake Tynis Lindsey Andrews Advisor: Dr. Robert Ash

  2. What is a CubeSat? • Small, lightweight satellites • Size = 10 cm cube (1 U up to 3U) • Total Mass < 1 kg • Orbital altitudes as great as 900 km (ISS is about 350 km) • CubeSat lifetime: ≈ 500 years ( 1000 yrs @ 900 km) • Velocities ≈ 7.4 km/s • NASA/IADC Guideline: Orbital lifetime of 25 years or less

  3. Objective • Develop a prototype inflatable device to deorbit CubeSats • Increase frontal area >> Increase drag >> Decrease orbital lifetime • Current Challenges: • Folding/Packaging • Inflation Initiation • Material Procurement

  4. Prototype Demonstration • US Air Force Plug and Play prototype system • LabVIEW to trigger the inflation sequence: • Boolean program outputs about 1 Volt • +1 Volt output is sent to relay • Relay amplifies signal up to 30 Volts, if desired • Amplified signal sent to Micro Solenoid valve to start air flow (inflation)

  5. Inflatable Material • Mylar • Resistant to punctures • Low cost • Vulnerable to radiation over long periods of time • Kapton • Good mechanical properties • External chemical coating necessary to prevent atomic oxygen degradation • Both will be utilized in the prototype development

  6. Cost Estimates

  7. Scheduling We have begun integration, headed towards full system testing!

  8. Current Progress: Folding Theory • Investigated different folding methods in the lab • Folding affects speed and ease of inflation • Must consider decreased frontal area due to bulges • Found that this is an area requiring further refinement

  9. Current Progress: STK • STK software used for drag analysis • Inputs: Orbital characteristics, frontal area • Outputs: Predicted orbital decay, orbital lifetime • EXAMPLE: Plausible CubeSat orbit and frontal area: Eccentricity (0 to 0.004) Yellow: Height of Apogee Red: Height of Perigee Blue: Eccentricity Altitude (0 – 900 km) Time Elapsed (Years 2004 – 2021)

  10. Current Progress: Materials • Acquired Materials: • Mylar • Adhesive • Gas cylinder • Micro Solenoid Valve • Relay • Aluminum Deorbit Casing • Steel “Cubesat” Micro Solenoid Valve Above: Deorbit Casing Below: Mock CubeSat

  11. Current Status: Lab Simulation • Have now acquired all parts; ready for lab simulation.

  12. Conclusions • Goal: Create deorbiting device for CubeSat • Complete Lab simulation using: • LabVIEW • Remote Communication • Challenges: • Weight • Packaging • Folding • Signaling

  13. Sources • Bate, Roger R, Donald D Mueller and Jerry E White. Fundamentals of Astrodynamics. New York: Dover Publications, Inc., 1971. • Bradford Engineering. "Sold Propellant Cool Gas Generator." 2006. <http://www.bradford-space.com/pdf/be_datasheet_spcgg_sep2006.pdf>. • California Polytechnic, State University. "CubeSat Design Specification Rev.12." • Clippard Instrument Laboratory, Inc. www.Clippard.com. 2011. • D.C. Maessen, E.D. van Breukelen, B.T.C. Zandbergen, O.K. Bergsma. "Development of a Generic Inflatable De-Orbit Device for CubeSats." (n.d.). • DuPont. "Summary of Properties for KaptonPolymide Films." <http://www2.dupont.com/Kapton/en_US/assets/downloads/pdf/summaryofprop.pdf>. • IADC. "Space Debris Mitigation Guidelines." Standard. 2007. • Lokcu, Eser. "Design Considerations for CubeSat Inflatable Deorbit Devices in Low Earth Orbit." Old Dominion University (2010). • McMaster Carr. 27 November 2010 <http://www.mcmaster.com/#aluminum/=a2cdo0>. • Office for Outer Space Affairs. "Space Debris Mitigation Guidelines of the Committee on the Peaceful Uses of Outer Space." Vienna: United Nations, 2010. • Pumpkin, Inc. CubeSat Kit. 2008. <http://www.cubesatkit.com/>. • R. Janovsky, M. Kassebom, H. Lubberstedt, O. Romberg. END-OF-LIFE DE-ORBITING Strategies for Satellites. Bremen: OHB System AG, 2002. • RobotShop. 30 November 2010 <http://www.robotshop.com/>. • WackerChemie AG. 1 December 2010 <http://www.wacker.com/cms/en/products-markets/trademarks/elastosil/elastosil.jsp>.

  14. Thank you for your time! • Questions?

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