Mission Design for the CubeSat OUFTI-1

CHAPTER 66.1 Pumpkin structureThe structure developed by Pumpkin.Inc (San Francisco,CA,USA) is the mainpart of the so-called CubeSat-Kit. They offer in fact a wide range of productsfor CubeSat from hardware to software. At the moment, two of this structuresare flying on the CubeSats Libertad-1 (University Sergio Arboleda, Bogotà,Colombia) and Delfi-C3 (TU Delft, The Netherlands). Concerning the last one,it’s a 3-Unit structure.The base configuration is composed by:- Flight Model- FM340 Flight Module- Salvo Software and librariesFurthermore a development board to test the CubeSat, a rechargeable electricalpower system and an attitude determination and control system based onreactions wheels, torque coil dampers and magnetometers are available.Two kind of structure are actually available:(fig.6.1).skeletonized or solid-wallsFigure 6.1: CubeSat-Kit structure skeletonized and solid-wallsThe standard one is the skeletonized as it minimize the mass (see table 6.1).The materials employed are two aluminium alloys: 5052-H32 for the chassis, thecover plate and the base plate and 6061-T64 for all the machined components(i.e. feet, spacers). The surfaces in contact with the launcher are hard anodyzedto prevent galling and the other surfaces are gold alodyned to guarantee theconductivity.Galli Stefania 58 University of Liège