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Avionics Group Project

Avionics Group Project. Chris Flood Matt Marcus Kiran Patel Tim Russell. Problem Statement. Calculate communications link budgets for a variety of links Compile sensors list for mission Develop list of possible ENAE484 projects for next semester and rank top 3 project ideas. Sensors List.

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Avionics Group Project

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  1. Avionics Group Project Chris Flood Matt Marcus Kiran Patel Tim Russell

  2. Problem Statement • Calculate communications link budgets for a variety of links • Compile sensors list for mission • Develop list of possible ENAE484 projects for next semester and rank top 3 project ideas

  3. Sensors List • Proximity Sensors • Linear Motion • Angular Rotation • Hull Temperature • Cabin Temperature • O2 / CO2 / CO / Humidity Sensors • Cabin Pressure • Solar Panel Energy Output • Fuel Gauge

  4. Proximity Sensors • High criticality sensors, will have redundant sensors in case of failure during mission • Must function for proper navigation • Sampling rate - 1Hz • Scanning Laser Rangefinder • 10 total sensors • 4 spaced 90 degrees apart all the way around the craft • 4 sensors redundant to these on vehicle hull • 2 placed on bottom of craft for docking and landing

  5. Translational and Angular Motion • Continuous high sampling rate • Extremely critical system for navigation and control • Have redundant sensor in case of failure • Sampling Rate - 10 Hz • Important to have up to date information for spacecraft motion and control • Use stock 2 IMUs • Measure x, y, z, roll, pitch, yaw • ENERGY REQUIREMENTS

  6. Cabin Temperature / Pressure Sensors • Highly critical sensors for life support applications • Not necessary for spacecraft function • Sampling Rate - 1Hz • Absolute Pressure Sensor for pressure • Thermistors for Cabin Temperature • Determine cabin pressure throughout mission • Keep cabin pressure within habitable limits • Keep cabin temperatures within habitable limits

  7. O2 Sensors • For O2 tanks, important for tracking propellant pressures – absolute pressure for tanks • Sampling Rate – 1Hz • Detect O2 levels within cabin at any point in time • Determine limits for safe operation, remain out of critical flammability limits • O2 pressure sensors for O2 tanks • Determine pressure, amount of usable O2 remaining in tanks at any given time during mission

  8. CO2/CO Sensors • Not critical for mission, only determines CO2/CO in cabin, mission continues with or without • Sampling Rate – 1 Hz • Determine levels of CO2/CO within crew cabin • Remain within safe limits for astronaut habitability • Determine amount of CO2/CO scrubbing necessary at any point in time during mission • ENERGY REQUIREMENTS

  9. Solar Power Energy Output • Use voltmeters to determine voltage generated from solar cells • Sampling rate: 10Hz • Determine power output of solar panels over time • Ensure adequate storage and generation of energy • Disable non vital systems during power lows

  10. Fuel Gauge • Keep track of pressures and amounts of propellants remaining for mission • Ensures proper rationing of propellants for use throughout mission duration • Sampling rate: 10Hz • Very high criticality for propulsion system

  11. DBTE Ideas : Human Factors for an Inflatable Habitat (Top 3) • Optimal interior layout / sizing • Launch configuration for uninflated structure • What can we test? • Configuration and placement of hardware • Create various different layouts for habitat and have participants rate ease of task completion each configuration

  12. DBTE Ideas : Window configuration (Top 3) • Determine adequate sightlines for landing • What can we test? • Test different window configurations / layouts • Design a variety of window configurations and find optimal window angle and layout for maximum visibility

  13. DBTE Ideas : Window configuration (Top 3) • Why do we care? • Previous Space habitats (e.g. ISS) have not been inflatable • Gather data on efficient layout and design of inflatable habitat

  14. DBTE Ideas : Window configuration (Top 3) • Why do we care? • Landing is riskiest part of mission, human executed task, ensure proper visibility

  15. DBTE Ideas : Sleeping Arrangements (Top 3) • Create adequately comfortable sleeping conditions for astronauts • What can we test? • Bed types and arrangements within crew cabin • Test sleep quality through various sleeping configurations via stamina and functionality test after sleeping • Why do we care? • Sleep is critical for astronaut health and for proper functioning during mission

  16. Additional DBTE Ideas • Water cycle taste test • Airlock evaluation • Situational awareness of robotics operator • Ladder design • Visibility when docking • Suit port entry exit

  17. Communication Link Budgets • We will use White Sands receiving antenna (WS-1) on Earth • 18m diameter antenna • L-2 relay satellite modeled as TDRS • Capsule high gain antenna will be outfitted for Ku, Ka, and S band transmitters • 0.5m diameter parabolic dish • 60.5 W max power consumption

  18. Link Budget: Ku Band Directly to Earth

  19. Link Budget: S-Band Directly to Earth

  20. Link Budget: Ka-Band to L-2 Relay

  21. Link Budget: Ku-Band L-2 Relay to Earth

  22. Link Budget: UHF Omni to EVA suits

  23. UHF Omni to EVA suits Antenna diameter of 11cm easily fits on suits Transportable power of 0.5w is attainable Slant range of 20km will more then double max distance transverse by Apollo Data Rate of 1.5 Mbps will transmit suit video and all other communications

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