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Hardware-in-the-loop synthesis and analysis of
spacecraft micropropulsion systems
Rikard Ottemark & Johan Sundqvist
Main S...
Nanosatellites
• Low cost
• Short production time
• Technology demonstrators
• Education
• Time and spatial resolution
Micropropulsion systems
Nanosatellite main Conventional satellite ADCS
propulsion or disturbance reduction
Micropropulsion systems
• Small impulse bits
• High precision
• Relatively large
• Relatively high power
consumption
Micropropulsion systems
• Minimum mass
• Minimum size
• Minimum power consumption
• Rare
NanoSpace CubeSat propulsion module
• Four 1mN thrusters
• Individually controllable
• Complete system
• Propellant tank w...
NanoSpace CubeSat propulsion module
• ”6U” version under development
• Dual propellant storage tanks
• Plenum tank
• More ...
NanoSpace CubeSat propulsion module
• IOD on Chinese TW-1 satellite, Launched Sept 2015
• First thruster firings in Novemb...
NanoSpace CubeSat propulsion module
• New mission: De-spin the satellite!
• OBC off
• Manual control
• Preparations for fo...
NanoSpace CubeSat propulsion module
• Two planned launches in 2017
• MIST, 3U system (KTH, SE)
• GOMX-4B, 6U system (GomSp...
Simulations
• EcosimPro
• Propellant flow
• Pressure
• Temperature
• State
• Plenum tank
Hardware-in-the-loop simulation
• Spherical air bearing
• Modular cold gas system
• Attitude determination
• Real-time Sim...
Platform challenges
• Minimize moment of
inertia
• Align mass center with
center of rotation
• Propellant selection
SIF #2: 6 - μPILS, Hardware-in-the-loop Synthesis and Analysis of Spacecraft Micropropulsion Systems
SIF #2: 6 - μPILS, Hardware-in-the-loop Synthesis and Analysis of Spacecraft Micropropulsion Systems
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SIF #2: 6 - μPILS, Hardware-in-the-loop Synthesis and Analysis of Spacecraft Micropropulsion Systems

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Hardware-in-the-loop Synthesis and Analysis of Spacecraft Micropropulsion Systems, innovation project by Ph.D. candidate Rikard Ottemark, main supervisor Prof Reza Emami, assistant supervisor Dr. Kristoffer Palmer (NanoSpace) and coordinator Johan Sundqvist.

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SIF #2: 6 - μPILS, Hardware-in-the-loop Synthesis and Analysis of Spacecraft Micropropulsion Systems

  1. 1. Hardware-in-the-loop synthesis and analysis of spacecraft micropropulsion systems Rikard Ottemark & Johan Sundqvist Main Supervisor Prof. Reza Emami Onboard Space Systems Assistant Supervisor Dr. Kristoffer Palmer Nanospace May 10, 2016
  2. 2. Nanosatellites • Low cost • Short production time • Technology demonstrators • Education • Time and spatial resolution
  3. 3. Micropropulsion systems Nanosatellite main Conventional satellite ADCS propulsion or disturbance reduction
  4. 4. Micropropulsion systems • Small impulse bits • High precision • Relatively large • Relatively high power consumption
  5. 5. Micropropulsion systems • Minimum mass • Minimum size • Minimum power consumption • Rare
  6. 6. NanoSpace CubeSat propulsion module • Four 1mN thrusters • Individually controllable • Complete system • Propellant tank with filters and temperature control • Thruster modules with nozzle, proportional valves, sensors, heaters • On/off solenoid valves (two barriers) • Control and I/F electronics
  7. 7. NanoSpace CubeSat propulsion module • ”6U” version under development • Dual propellant storage tanks • Plenum tank • More barriers • New communication I/Fs and protocols • Modular design • Thrusters can be placed quite freely…
  8. 8. NanoSpace CubeSat propulsion module • IOD on Chinese TW-1 satellite, Launched Sept 2015 • First thruster firings in November • Orbit raised by ~600 m • Thrust misbalance observed • Problem in ADCS caused spin-up
  9. 9. NanoSpace CubeSat propulsion module • New mission: De-spin the satellite! • OBC off • Manual control • Preparations for formation flying started in April • Delta-V maneuvers expected to start soon
  10. 10. NanoSpace CubeSat propulsion module • Two planned launches in 2017 • MIST, 3U system (KTH, SE) • GOMX-4B, 6U system (GomSpace, DK) • Thruster upscaling • 10-30 mN butane thrusters
  11. 11. Simulations • EcosimPro • Propellant flow • Pressure • Temperature • State • Plenum tank
  12. 12. Hardware-in-the-loop simulation • Spherical air bearing • Modular cold gas system • Attitude determination • Real-time Simulink integration
  13. 13. Platform challenges • Minimize moment of inertia • Align mass center with center of rotation • Propellant selection

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