Master Thesis - OUFTI-1

Components
Mass (g)
4 spacers 25 mm 4 × 0.475 = 1.9
4 T i screws 4 × 0.86 = 3.44
4 T i spacers 4 × 0.29 = 1.16
4 T i nuts 4 × 2.32 = 9.28
2 heaters 2 × 1.5 = 3
Heaters' control system 10
Radiative insulation 15
16 thermal washers 16 × 0.08125 = 1.3
Battery PCB 15.5
2 batteries Kokam SLB 603870H 2 × 33 = 66
4 wires 4 × 2 = 8
Total 134.58
Table 3.1: Available mass budget
To this result, some important corrections must be added. These corrections, which
came from revisions or improvements of designs, are related in Table 3.2.
Components Last year's mass (g) This year's mass (g) Dierences (g)
Thermal knife 19 0.5 + 18.5
Permanent magnet 13 3 + 10
Hysteretic bars 14 3 + 11
COM card 75 65 + 10
Total 121 71.5 + 49.5
Table 3.2: Important corrections in the mass budget
So, the total available mass budget for the new support is: 103.79 + 49.5 = 153.29 g.
3.4 Initial idea
The base idea of the new support was imagined by Jean-Philippe NOEL, who is in
charge of the THER subsystem [35]. The idea is the following one: instead of placing the
batteries one on the other, it was a better idea to place them one next to the other. This
new conguration allows to release more space between the batteries and the electronic
cards for integrating the box. An illustration of this new design is available in Figure 3.4.
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