aero3760 group 4 cubelicious cdr
Download
Skip this Video
Download Presentation
AERO3760 Group 4: “ Cubelicious ” CDR

Loading in 2 Seconds...

play fullscreen
1 / 23

AERO3760 Group 4: “ Cubelicious ” CDR - PowerPoint PPT Presentation


  • 81 Views
  • Uploaded on

AERO3760 Group 4: “ Cubelicious ” CDR. Alex Bunting Geoff Chang Nathan Wallace Harry Wood Michael Holmes. Mission Objectives. Monitor Earth’s magnetic field over an extended period Perform technology demonstration of USYD Charge Exchange Thruster

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' AERO3760 Group 4: “ Cubelicious ” CDR' - erna


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
aero3760 group 4 cubelicious cdr

AERO3760 Group 4: “Cubelicious” CDR

Alex Bunting

Geoff Chang

Nathan Wallace

Harry Wood

Michael Holmes

mission objectives
Mission Objectives
  • Monitor Earth’s magnetic field over an extended period
  • Perform technology demonstration of USYD Charge Exchange Thruster
  • CXTs used for station keeping to extend orbit life
mission requirements
Mission Requirements
  • Launch and Orbit
    • 2018 to allow for CXT development.
    • LEO Sun Synchronous 300km
  • Attitude and Position Determination
    • Required to map magnetic field
    • Surrey Technology GPS and ISIS Sun-Sensor
  • Magnetic field measurements
    • ISIS Magnetometer
  • Thruster for station keeping
    • Custom high voltage 15kV power supply
    • Custom argon gas propellant tank
structure
Structure
  • A standard ISIS 2U Model
    • Shock and vibration tested
    • Easy component mounting
  • Component Layout
    • Minimise centre of gravity through symmetrical design
    • Minimise moments of inertia through clustering at centre
power components
Power Components
  • Components:
  • PCB
  • 2xLithium Ion Batteries
  • 4x2U solar panels
  • Zero Voltage Switching (ZVS) Flyback Driver and Cockcroft Walton (CW) Generator
power consumption
Power Consumption
  • Maximum Margin: 87.61% per cycle in Safe Mode
  • Minimum Margin: 14.19% per cycle in Thrust Mode
communications
Communications
  • The Texas Instruments CC1120 UHF Band RF Transceiver.
  • Operating half-duplex on the 433 MHz Bandwidth.
  • Low power output: ~100mW, requires power amplifier.
  • Mission-tested: CAPE-1 (University of Louisiana) and CP4 (California Polytechnic Institute) missions.
  • SPI Interface, dual buffer system.
  • Transmission via the ISIS Deployable UHF/VHF antenna system in Dipole-Dipole configuration.
  • Utilising the ISIS antenna\'s integrated 2W power amplifier configured to output at 1W.
  • Operating on 3.3v Logic and Power levels.
  • Second dipole antenna is wired as backup.
transceiver board
Transceiver Board
  • Compact Layout
  • On-board 5v-3.3v Regulator
  • Extensive Decoupling Capacitors
  • MOLEX Antenna Interface
on board computer
On-Board Computer
  • The on-board computer for the satellite will be a custom-made PCB consisting of the following components:
  • Texas Instruments MSP430F2419 Microprocessor[3]
  • Texas Instruments UA78L02A 3-terminal 2.6V voltage regulator [4]
  • Microchip 25AA1024 Serial EEPROM Module [5]
  • Multicomp SDMBF-00915B0T2 Push-Push SD Memory Card Connector (Type B) [6]
  • Intersil HIN208ECBZ RS-232 transmitter/receiver interface circuit chip [7]
  • Samtec TSW-107-02-S-D 14-pin terminal strip (debug header port) [8]
  • IQD Frequency 12SMX B 16MHz crystal oscillator [9]
  • CNR9F: DB9 Port (for RS-232 Driver)
  • 2 x 18pF Capacitors (for oscillator)
  • 5 x 100nF Capacitors (for RS-232 Driver)
module interconnections
Module Interconnections
  • Module interconnections are shown below. The red lines are power connections and the blue lines are the control wiring.
attitude control
Attitude Control
  • Most components designed by hand
  • Refinement critical when CXT is fully developed
  • Reaction Wheels
    • Blue Canyon Technologies
    • Torque: 0.6 mN.m
    • Power usage: 0.1 W
    • Size: 43x43x18 mm
    • Total of 3 used
charge exchange thruster
Charge Exchange Thruster
  • Developed by University of Sydney
  • Total of 12 used, in sets of 6
  • Still in development
    • Fuel: Argon gas or Iodine solid
    • Thrust: Approx. 0.08 mN
    • Specific Impulse: Approx. 15,000 s
    • Fuel rate: Unknown
fuel tank
Fuel Tank
  • Operating fuel rate, pressure and fuel type not confirmed
  • Designed for Argon gas
    • Made of aluminium
    • Leaks before fracture
    • Inner radius: 23.5 mm
    • Outer radius: 27 mm
    • Safety factor to yielding: 2
piping
Piping
  • Same pressure as tank
  • Aligned with the tank’s brace
  • Designed for Argon gas
    • Made of aluminium
    • Inner radius: 5.2 mm
    • Outer radius: 6 mm
    • Safety factor to yielding: 2
valves
Valves
  • Highly dependent on fuel rate and pressure
  • Design not possible until CXTs confirmed
  • Likely to use a piezoelectric actuator, similar to that shown on the right
    • Uses high voltage, similar to CXTs
    • May need to adjust pressure to operate correctly

Source: M.C. Louwerse, H.V. Jansen, M.C. Elwenspock, “Modular Thruster and Feeding System for Micro-Satellite”, University of Twente

overview of test plans
Overview of Test Plans
  • Unit Testing of individual hardware modules with associated software.
  • Bus Testing of SPI and I2C busses with simulation of hardware loss.
  • Radiation Testing during operation
  • Thermal Shock Testing
  • Power Load Testing
  • Recovery Mode Testing

Abstract Integration Plan:

Structure -> EPS -> OBC -> Transceiver -> Antenna -> Reaction Wheels -> Sensory Suite -> Thruster Tank -> Thrusters and Power Board -> Solar Cells

ad