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Team Tesla

Team Tesla . Anthony Thompson Philip de la Vergne Aaron Wascom Brandon Sciortino. Overview. Address items added since PDR Electrical Design Software Design Mechanical Design Hardware Fabrication and Testing Integration Plan Flight Software Implementation and Verification

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Team Tesla

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  1. Team Tesla Anthony Thompson Philip de la Vergne Aaron Wascom Brandon Sciortino

  2. Overview • Address items added since PDR • Electrical Design • Software Design • Mechanical Design • Hardware Fabrication and Testing • Integration Plan • Flight Software Implementation and Verification • Flight Certification Testing • Testing Procedure • Testing Results • Mission Operations • Calibrations • Data Analysis • Schedule, Risk Management, etc.

  3. Sensors • Temperature • F3141 RTD sensor • Linear resistance with temperature • Accuracy of +/-0.65°C • Range of -70°C to 40°C • Requirements • Linear Output • Accurate to 1°C • Range of -70°C to 40°C

  4. Sensors • Pressure • Measurement Specialties 1230 sensor • Accuracy of +/- .05% • Range 0 to 7000 mbar • Range -40°C to 135°C • Requirements • Accurate to 2 mbar • Range of 10 mbar to 1013 mbar

  5. Sensors • Humidity • HIH-4000 • Accurate to 3.5% RH • -40°C to 85°C • 0% to 100% Relative Humidity • Requirements • Accurate to 3.5% Relative Humidity • Range of 0% to 100% Relative Humidity

  6. Temperature Sensor Interfacing • Gain: 7.6 Offset: 5.52V • R1=7.5kΩ R2=5.44kΩ R3=10kΩ R4=2.1kΩ

  7. Figure 4. Pressure Measuring Circuit Pressure Sensor Interfacing • WBEE Manual

  8. Humidity Sensor Interfacing • Gain: 1.572 Offset: .4545V • R1=7.5kΩ R2=41.98kΩ R3=10kΩ R4=29.9kΩ

  9. Control Electronics

  10. Power Supply

  11. Power Budget

  12. Batteries • AAA Lithium batteries compared to Alkaline

  13. Batteries • AAA Lithium batteries compared to Alkaline • Batteries needed that provide adequate charge • 12 AAA Lithium Batteries chosen to supply voltage

  14. Data Format and Storage

  15. Pre-Flight Software

  16. Flight Software

  17. Flight Software

  18. Flight Software

  19. Flight Software

  20. Flight Software

  21. Post-Flight Software

  22. External Mechanical Structure

  23. Internal Mechanical Structure

  24. Weight Budget

  25. Payload Construction Plan • Control Electronics Fabrication and Testing • Test each piece individually • Connect pieces one at a time, test • Assemble system, check timing diagram • Connect to HVDC • Spark Gap Fabrication and Testing • Spark gap created for testing • After CDR, create a flight gap

  26. Integration Plan • Humidity and temperature designed on a single board • Wires connect board to BalloonSat • Control Electronics on single board • Wires connect board to BalloonSat through DAC and conditioning circuits • Velcro Straps to connect to the payload

  27. Flight Software Implementation and Verification • Flight software has multiple functions • Keep accurate time • Read data from ADC • Output to DAC • Sense trips in high voltage circuit • Reset high voltage circuit • Store data to EEPROM

  28. Testing Procedure/Results • Temperature Sensor • Put sensor in a box of dry ice • Used equation from data sheet to calculate resistance • Measured resistance with multimeter • Results

  29. Testing Procedure/Results • Pressure Sensor • Connect sensor to hand pump • Compare sensor output to hand pump gauge • Results

  30. Testing Procedure/Results • Humidity Sensor • Follow Procedure in WBEE manual • Check voltages at key points • Exhale on sensor, observe change in voltage • Results

  31. Testing Procedure/Results • Spark Gap Testing • Use high voltage source to create corona • Test in the vacuum chamber to confirm operation • Results

  32. Testing Procedure/Results

  33. Testing Procedure/Results

  34. Testing Procedure/Results

  35. Calibrations • Conditioning circuits • Correct output for ADC • Correct gain • RTC • Correct time for timestamp data • GPS • Used for altitude

  36. Pre-Launch Checklist

  37. Flight Requirements, Operations, Recovery • Flight Profile • 0-100% Relative Humidity • 10-1010mbar • -70 to 40°C • No particular orientation or telemetry • Tracked by GPS, recovered after flight

  38. Data Acquisition • Term32 will be used to extract data from EEPROM • Stored on PC as text file • Converted to decimal • Using conversion factor depending on bits

  39. Data Analysis Plan • Use text files • Create graphs to identify correlations • Pressure vs. Corona • Temperature vs. Corona • Humidity vs. Corona • Use Microsoft Excel

  40. Updated Project Management

  41. Master Schedule

  42. WBS

  43. WBS

  44. WBS

  45. Staffing Plan

  46. Master Budget

  47. Expenditure Plan

  48. Material Acquisition Plan

  49. Risk Management and Contingency

  50. Contingency

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