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Cansat 2008: University of New Hampshire Final Presentation

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Final presentation by University of New Hampshire at CanSat 2008 …

Final presentation by University of New Hampshire at CanSat 2008

http://www.astronautical.org/2008/06/15/cansat-2008-university-of-new-hampshire/

Published in: Travel, Business

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Transcript

  • 1. CANSAT Final Presentation June 15 th 2008
  • 2. WildCatSat Team
  • 3. Outline
    • Design Overview
    • Raw Data Plots
    • Processed/Analyzed Data Plots
    • Outcome of Flight Ops/Failure Analysis
    • Comparison of Actual CONOPS to Planned CONOPS
  • 4. Mechanical Design Overview
    • System Bus:
    • ABS Plastic
    • Rapid Prototype using 3-D Printer
    • Recovery System:
    • Octagonal Parachute
      • Rip-Stop Nylon
      • Area: 1.016 m 2
    • Nylon Cord
  • 5.
    • Up-righting System:
    • Hinged side doors
    • Torsion springs provide force to open doors
    • Pin connected to servo motor holds doors in place/releases doors
    • Parachute Release System:
    • Pin attached to side door
    • Pin holds parachute to bus while doors closed
    • Total Measured Mass: 470g
    Mechanical Design Overview
  • 6. Structural Drawings
  • 7. Electrical System Diagram Processor Pressure Sensor Transceiver Buzzer Servo Transceiver Computer
  • 8. Electrical Design Overview
    • Sensors:
    • SCP1000 Barometric pressure and temp. sensor
    • Microprocessor:
    • Atmel ATMega168
    • Transmitter:
    • Aerocomm AC4790-1000M
    • Battery
    • 11.1V 800 mAh Li-Poly
    • 12.26V Initial, 12.19V After Mission: 0.7V Drop
  • 9.
    • Ground Station Computer:
    • HP Pavilion N5425
    • Ground Station Receiver:
    • Aerocomm ConnexLink 4790
    • Ground Station Antenna:
    • External high gain omni-directional antenna
    Ground Station
  • 10. Raw Data Plots
  • 11. Processed Data Note: Matlab truncation of LS digit = loss in accuracy 0 20 40 60 80 100 120 140 160 180 200 8.4 8.6 8.8 9 9.2 x 10 4 Mission Time (s) Pressure (Pa) 0 20 40 60 80 100 120 140 160 180 200 -200 0 200 400 600 800 Mission Time (s) Altitude (m)
  • 12. Processed Data (cont.) (Processed with Matlab’s ‘Diff’ and ‘Filter’ functions and window size of 10) From VTI Tech: “Assumed constant temp. gradient of dT/dH from 1976 US Standard Atmosphere” H = 30°C/(6.5°C/km)*(1-(P/101325Pa)^0.19 Reference: VTI Technologies
  • 13. Flight Operations
    • Altitude Transmission: Success
    • Average Descent Rate: 3.3767 m/s
    • Descent Time: (1340s-1160s)/60 ~3 min
  • 14. Flight Operations (cont.)
    • Recovery: Success
    • Up-righting System: Success
    • Ground Temperature (bonus): Not Met
    From: 34.48.097N 101.35.244W To: 34.47.88N 101.35.562W ~1.28km Lateral Distance Traveled Reference: http://www.movable-type.co.uk/scripts/latlong.html
  • 15.
    • Pattern Loss ~30%
    • Ground Absorption
    • Terrain
    • Ground Station Antenna height
    a) Elev. Pattern b) Azimuth Pattern Reference: Aerocomm Corp. Failure Analysis
  • 16.
    • Satellite activated
    • Satellite loaded into rocket
    • Satellite takes initial pressure reading
    • Rocket launches
    • Satellite detects pressure change, starts sending
    • pressure/altitude data
    • Satellite ejects from rocket
    • Parachute deploys, slowing descent
    • Satellite descends at less than 4.6 m/s
    • Satellite continues to transmit data
    • Satellite lands
    • Doors open up-righting satellite
    • Parachute released
    • Buzzer activates
    • Ground temperature reading and transmission
    • Data transmission stops
    Preparation Launch Deployment Descent Recovery CONOPS Comparison
  • 17.
      • UNH ECE Dept.
      • UNH ME Dept.
    WildCatSat Sponsors
    • Jon Arlington at
      • Orbital Sciences Corp.
    • The Byrd Family
    Todd Gross Professor and Chair May-Win Thein Associate Professor
  • 18. Questions? Professor May-Win Thein Project Advisor Ph.D Mechanical Engineering [email_address] Robert Terry Team Leader Electrical Engineer [email_address]