Optimized Three-unit CubeSat structure for Delfi-n3Xt

Paper number

IAC-08.B4.6.A1

Author

Ms. Sioe Yen Go, Delft University of Technology, The Netherlands

Coauthor

Mr. Jasper Bouwmeester, Delft University of Technology, The Netherlands

Coauthor

Mr. Geert Brouwer, Delft University of Technology, The Netherlands

Year

2008

Abstract

Since the first CubeSat was designed and built, many followed. Their structure designs reveal a variety of possibilities for filling in the needs of the missions. The designs however are also constrained, e.g. by the use of a bought-out CubeSat kit. Based on the lessons-learned from the first three-unit CubeSat of the Delft University of Technology, Delfi-C3, an optimised structure for its successor, Delfi n3Xt, has been developed, which allows for the accomodation of five technological and scientific payloads.

Issues from the Delfi-C3 have been the amount of time needed for assembly, integration and test of the Printed Circuit Boards (PCBs) into the structure in relation to the restrictions set by the bought-out structure. As a consequence, a substantial number of adaptations and custom designed parts were needed to replace standard kit parts. Furthermore a lot of time in the development phase was spent for the mounting, integration and test of the PCBs.

The structure subsystem is an important subsystem in any satellite, providing support and protection to payloads, PCBs and sub-systems. While the main objective is the mission phase of the satellite, an optimum structure is not only able to accomplish the functions during mission life, but is also manageable during the development phase. The structure subsystem of the second nano-satellite, Delfi-n3Xt, should allow for a smooth and more time-efficient assembly, integration and test. This also results in a reduction of risks during handling.

At the start of Delfi-n3Xt satellite project a study was done on the variety of structure design build-ups and the implementation concepts of PCBs of already existing nano-satellites. With the results of this study the needs of Delfi-n3Xt were assessed in relation to the implementation of the payloads and the handling characteristics during manufacturing, assembly, integration and test activities. A selected number of configurations for a three-unit CubeSat have been reviewed in more depth on their advantages and disadvantages. Focal points for this analysis were: the dimensions, mechanical and electrical interfaces of the five payloads and other sub-systems, accessibility, assembly, modularity, integration and the use of existing ground support equipment. Finally rationales are given, for the choice of a customised structure of Delfi-n3Xt, based on the various requirements.

Abstract document

IAC-08.B4.6.A1.pdf

Manuscript document

IAC-08.B4.6.A1.pdf (🔒 authorized access only).

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