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

2.  Small, lightweight satellites  Orbital energies as high as 29 MJ!  NASA/IADC (UN) Guideline: Orbital lifetime of 25 years or less  Our Objective: Demonstrate proof of concept deorbiting device using inflation

3.  We have designed and fabricated the inflatable container  Sourced materials for constructing a flight ready prototype  Procured the necessary individual components to assemble a proof of concept prototype  Analyzed the orbit with STK orbital software to confirm the inflatable size necessary  Conducted inflation tests to develop an effective folding technique

4.  Further testing of the integrated product requires a simulation of the rupturing membrane  Must provide temporary rigidity to restrain stowed inflatable, while allow access to inflation port  Must also cleanly tear and not restrict inflation 10 cm 4 cm

5.  Conducted in the Physics Instrumentation Lab

6.  Remote control valve actuation  More accurately simulates the actual initiation method  On orbit initiation would be triggered from the main CubeSat bus

7.  Vacuum chamber  Physics Department vacuum chamber is currently undergoing a retrofit  This will allow for vacuum testing in pressures as low as less than 1 millibar (P atm = 1013.5 millibar)  Additionally, this vacuum chamber can be utilized by the Physics Department for various other student projects

8. Prototype MaterialCost 2 Mil Mylar$60 Contact Cement$10 Gas Cylinder (from lab)$0 Lab air$0 Aluminum (from stock)$0 Valve (Clippard)$48 Circuit board $5 Vacuum Chamber (Testing) $0 Microcontroller (Testing) $90 Misc.$20 Net cost:$233 Space-Qualified Design MaterialCostMass (g) Upilex-S polyimide film (50µm)$75126 Elastosil S$150.004 Aluminum 6061-T6$152.13 SUVA-236fa refrigerantunknown1.77 Aluminum 6061-T6 (from stock)$02.13 Upilex-S polyimide film (50µm)incl. above0.74 Dyneema$30.075 Clippard≥ $70Around 11 g Misc.$15 CostNet mass (g) $193143.849

9.  We had projected we would complete the project 4/21/2011  The final test was conducted 4/20/2011 ( ! )

10.  Investigation of different folding methods  Folding affects speed and ease of inflation  Low pressure deployments  Accurately simulate operational environment  Elaborate on the influence of pressure on membrane rupture  Scaling down of valve  Development of custom fabricated inflatable  Refinement of rupturing membrane

11.  Goals were met  Extras  Remote valve actuation  Vacuum chamber for future testing  Challenges remain  Packaging  Custom inflatable  Scaling down of valve

12.  1. California Polytechnic, State University. CubeSat Design Specification Rev.12.  2. Pumpkin, Inc. CubeSat Kit. [Online] 2008. http://www.cubesatkit.com/.  3. R. Janovsky, M. Kassebom, H. Lubberstedt, O. Romberg. END-OF-LIFE DE-ORBITING Strategies for Satellites. Bremen : OHB System AG, 2002.  4. Space Debris Mitigation Guidelines of the Committee on the Peaceful Uses of Outer Space. Office for Outer Space Affairs. Vienna : United Nations, 2010.  5. IADC. Space Debris Mitigation Guidelines. s.l. : IADC, 2007. Standard.  6. Development of a Generic Inflatable De-Orbit Device for CubeSats. D.C. Maessen, E.D. van Breukelen, B.T.C. Zandbergen, O.K. Bergsma.  7. Design Considerations for CubeSat Inflatable Deorbit Devices in Low Earth Orbit. Lokcu, Eser. 2010, Old Dominion University.  8. DuPont. Summary of Properties for Kapton Polymide Films. [Online] http://www2.dupont.com/Kapton/en_US/assets/downloads/pdf/summaryofprop.pdf.  9. Bradford Engineering. Sold Propellant Cool Gas Generator. [Online] 2006. http://www.bradford- space.com/pdf/be_datasheet_spcgg_sep2006.pdf.  10. Clippard Instrument Laboratory, Inc. www.Clippard.com. [Online] 2011.  11. Bate, Roger R, Mueller, Donald D and White, Jerry E. Fundamentals of Astrodynamics. New York : Dover Publications, Inc., 1971.  12. Chattopadhyay, Somnath. Pressure Vessels: Design and Practice. Boca Raton : CRC, 2005.  13. Wacker Chemie AG. [Online] [Cited: December 1, 2010.] http://www.wacker.com/cms/en/products- markets/trademarks/elastosil/elastosil.jsp.  14. RobotShop. [Online] [Cited: November 30, 2010.] http://www.robotshop.com/.  15. McMaster Carr. [Online] [Cited: November 27, 2010.] http://www.mcmaster.com/#aluminum/=a2cdo0.

13.  Questions?