Master Thesis - OUFTI-1
Master Thesis - OUFTI-1 Master Thesis - OUFTI-1
Figure 1.4 shows the main stage of Vega during a vibration test. The LARES system is situated on the top of the stage and, on the left of this picture, one P-POD can be seen. Last year, the P-PODs were theoretically placed horizontally inside the launcher. However, in order to facilitate the access to them (e.g., for recharging the batteries), it was decided to right them at an angle of 10 ◦ from the vertical. This fact is really important to note because this modication will change signicantly the loads apply on the CubeSat. Figure 1.4: Main stage of Vega [20] This opportunity results from an initiative of ESA that, in January 2008, published a call to oer a free launch for nine CubeSats on the Vega Maiden Flight after presenting the project at the Vega Maiden Flight CubeSat Workshop at the European Space Research and Technology Center (ESTEC). The OUFTI-1 team has submitted its own proposal in March 2008 and, in June 2008, received the conrmation that OUFTI-1 will take part in the Vega Maiden Flight. The eight other selected CubeSats and their specic missions, are: • Robusta (Montpellier - France): Study of radiation eects on bipolar transistors • UWE-3 (Würzburg - Germany): Development of an active attitude control system • AtmoCube (Trieste - Italy): Space weather measurements • E-St@r (Torino - Italy): Test of an active 3-axis attitude control system • UNICubeSat (Roma - Italy): Atmospheric neutral density measurements • PW-Sat (Warsaw - Poland): Test of a deployable drag augmentation device • Goliat (Bucharest - Romania): Earth imaging and space environment measurements 17
• XatCobeo (Vigo - Spain): Development of a Software-Dened Radio (SDR) and solar panel deployment system The Vega Maiden Flight will deploy these CubeSats into an orbit of 354 × 1447 km altitude with 71 ◦ inclination. 1.2.3 Mission objectives The primary goal of the OUFTI-1 project is to provide hands-on satellite experience to students. For the OUFTI-1 project, there are three main payloads (illustrated in Figure 1.5). Figure 1.5: The three payloads of OUFTI-1 The rst one is the setting up of a functional D-STAR repeater in space. D-STAR, which stands for "Digital Smart Technology for Amateur Radio ", is a ham radio protocol recently developed by the Japan Amateur Radio League (JARL). The overall system provides a lot of new built-in features including digital communication (i.e., the quality of the data received is better than an analog signal at the same strength), simultaneous voice and data transmission (e.g., Global Positioning System (GPS) data and computer les), complete routing over the Internet and callsign-based roaming on a worldwide basis [21]. Therefore, the D-STAR system provides a new capability and functionality to the ham radio world and increases the eciency of emergency communications (e.g., during the hurricane Katrina, the whole telecommunications were out of order and it is amateur radio that allowed people to communicate with the rescue teams). This payload allows to test the performances of this protocol in space environment. 18
- 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: 1.2 OUFTI-1 project 1.2.1 Genesis O
- 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 and 32: Figure 2.13: Magnetic eld obtained
- Page 33 and 34: Figure 2.17: Pictures of the ADCS c
- 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
Figure 1.4 shows the main stage of Vega during a vibration test. The LARES system<br />
is situated on the top of the stage and, on the left of this picture, one P-POD can be seen.<br />
Last year, the P-PODs were theoretically placed horizontally inside the launcher. However,<br />
in order to facilitate the access to them (e.g., for recharging the batteries), it was decided<br />
to right them at an angle of 10 ◦ from the vertical. This fact is really important to note<br />
because this modication will change signicantly the loads apply on the CubeSat.<br />
Figure 1.4: Main stage of Vega [20]<br />
This opportunity results from an initiative of ESA that, in January 2008, published a<br />
call to oer a free launch for nine CubeSats on the Vega Maiden Flight after presenting the<br />
project at the Vega Maiden Flight CubeSat Workshop at the European Space Research<br />
and Technology Center (ESTEC). The <strong>OUFTI</strong>-1 team has submitted its own proposal in<br />
March 2008 and, in June 2008, received the conrmation that <strong>OUFTI</strong>-1 will take part in<br />
the Vega Maiden Flight. The eight other selected CubeSats and their specic missions,<br />
are:<br />
• Robusta (Montpellier - France): Study of radiation eects on bipolar transistors<br />
• UWE-3 (Würzburg - Germany): Development of an active attitude control system<br />
• AtmoCube (Trieste - Italy): Space weather measurements<br />
• E-St@r (Torino - Italy): Test of an active 3-axis attitude control system<br />
• UNICubeSat (Roma - Italy): Atmospheric neutral density measurements<br />
• PW-Sat (Warsaw - Poland): Test of a deployable drag augmentation device<br />
• Goliat (Bucharest - Romania): Earth imaging and space environment measurements<br />
17
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