Master Thesis - OUFTI-1
Master Thesis - OUFTI-1 Master Thesis - OUFTI-1
Figure 2.15: Final conguration of the ADCS This improves the overall system eciency and leads to an optimal solution (the magnetic eld inside each hysteretic bar is represented in Figure 2.16). Figure 2.16: Magnetic eld obtained in the hysteretic bars for the nal conguration [25] Pictures of the permanent magnet and hysteretic bars (these ones are not yet manufactured to the good dimensions) are shown in Figure 2.17. 31
Figure 2.17: Pictures of the ADCS components [25] 2.3.5 Electronic cards and battery support OUFTI-1 disposes of ve electronic cards. These cards are all based on the P C 104 standard [26]. The particularity of this standard is the P C 104 connector. This device, with 104 pins welded on it, allows a direct connection between all the cards of OUFTI-1. The PCBs are all made of Flame Resistant (FR) 4 that belongs to the class of Glass Fiber Reinforced Plastic (GFRP) material. The conguration for these cards, shown in Figure 2.18, is based on the following requirements: • The FM 430 card is placed in the bottom of the satellite, because it is on this card that the access ports are placed. So, these ports have to be placed in front of the holes of the chassis provided for this purpose, which are situated on the base plate. • The OBC 2 card is placed just above the FM 430 card. The reason is that these two cards have to communicate continuously so, to avoid a complicate cabling path, they are placed as close as possible one from the other. These two cards are managed by the student in charge of the OBC subsystem [27]. • Then, we choose to integrate the EPS card, because it is on this card that there is most components and, consequently, it is the card with the greatest mass. So, its location aects seriously the position of the CoG and, to respect the CubeSat standard requirement on the CoG location, it is better to place it as close as possible from the CubeSat geometric center. • For the same reason, the battery support comes next. Further detail will be available on chapter 3. • The fourth card is the xEPS one. The reason is the same that one for the two OBC cards (these cards have to be linked by several wires). However, in addition, we 32
- Page 1 and 2: University of Liège Faculty of App
- Page 3 and 4: Abstract OUFTI-1, standing for "Orb
- Page 5 and 6: 3.4 Initial idea . . . . . . . . .
- Page 7 and 8: List of Figures 1.1 The Pumpkin's C
- Page 9 and 10: 4.18 MAC matrix using the simple me
- Page 11 and 12: List of Acronyms ADCS Al AlNiCo ASI
- Page 13 and 14: Thesis outline This thesis focuses
- Page 15 and 16: of larger satellites. So, the CubeS
- Page 17 and 18: 1.2 OUFTI-1 project 1.2.1 Genesis O
- Page 19 and 20: • XatCobeo (Vigo - Spain): Develo
- Page 21 and 22: Chapter 2 OUFTI-1: Flight system co
- Page 23 and 24: Figure 2.2: Product tree of OUFTI-1
- Page 25 and 26: 2.3.2 Solar panels The armor panels
- Page 27 and 28: • We do not want to drill or manu
- Page 29 and 30: In our case, because of the limited
- Page 31: Figure 2.13: Magnetic eld obtained
- Page 35 and 36: consider the possibility of oshorin
- Page 37 and 38: Figure 2.20: Exploded view of OUFTI
- Page 39 and 40: I xx , I yy and I zz are called the
- Page 41 and 42: Subsystem: Structure & Conguration
- Page 43 and 44: Subsystem: Thermal Control Parts Co
- Page 45 and 46: Chapter 3 Design of a new support f
- Page 47 and 48: Figure 3.3: Batteries during and af
- Page 49 and 50: The concept is the following one: F
- Page 51 and 52: A test under vacuum conditions was
- Page 53 and 54: Thermal Expansion (CTE) of the mate
- Page 55 and 56: Figure 3.9: Classication by density
- Page 57 and 58: The last property to determine is t
- Page 59 and 60: • So, it was decided to use two t
- Page 61 and 62: is to prevent the batteries' bulge.
- Page 63 and 64: • Then, the thermostats, that wil
- Page 65 and 66: Figure 3.23: Schematics of the cove
- Page 67 and 68: • Other components, including the
- Page 69 and 70: 3.9.3 Dynamic behavior Finally, it
- Page 71 and 72: 3.10 Summary Through this chapter,
- Page 73 and 74: Chapter 4 Electronic cards dynamic
- Page 75 and 76: Figure 4.1: Example of manufacturin
- Page 77 and 78: Figure 4.4: Illustration of the exp
- Page 79 and 80: Figure 4.5: MAC between the two mod
- Page 81 and 82: • Global mass/stiness smearing me
Figure 2.15: Final conguration of the ADCS<br />
This improves the overall system eciency and leads to an optimal solution (the magnetic<br />
eld inside each hysteretic bar is represented in Figure 2.16).<br />
Figure 2.16: Magnetic eld obtained in the hysteretic bars for the nal conguration [25]<br />
Pictures of the permanent magnet and hysteretic bars (these ones are not yet manufactured<br />
to the good dimensions) are shown in Figure 2.17.<br />
31
Change language