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ERAU ASCEND! STRUCTURES and SYSTEMS INTEGRATION

ERAU ASCEND! STRUCTURES and SYSTEMS INTEGRATION. Nicholas Hammons. PREVIOUS STRUCTURE. Fold-out poster board mounting Carbon fiber-epoxy lid External GPS Velcro mounting Inseparable subsystems Wiring mess. GOALS. Improve component accessibility Separate subsystems Reduce wiring mess

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ERAU ASCEND! STRUCTURES and SYSTEMS INTEGRATION

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  1. ERAU ASCEND!STRUCTURES and SYSTEMS INTEGRATION Nicholas Hammons

  2. PREVIOUS STRUCTURE • Fold-out poster board mounting • Carbon fiber-epoxy lid • External GPS • Velcro mounting • Inseparable subsystems • Wiring mess

  3. GOALS • Improve component accessibility • Separate subsystems • Reduce wiring mess • Internalize GPS antenna • Integrate PICAXE microcontroller • Add solar cell module • Lighten payload (< 4 lbs)

  4. SOLUTIONS • Accessibility: Slide-out flanges • Sys. Separation: Separate power systems Separate levels • Wiring: Ribbon cable/connectors • GPS: Glass-epoxy lid • PICAXE: Data board • Solar Cells: Lid-mounted module • Weight: Composites

  5. CURRENT PAYLOAD STUCTURE • Shell • Lid • Shelving System • APRS Layer • Data Collection Layer

  6. PAYLOAD SHELL • Inherited/reusable shell • 5 launches • 8” x 8” x 8” cube • Bi-directional carbon fiber • ¼” foam core • External access to on/off switches • ~ 421 in3 useable volume

  7. PAYLOAD LID • Glass-epoxy • GPS transmission • ¼” foam core • GPS antenna/ground plane mounted internally • Solar cells mounting • Silicon gel to reduce heat flux

  8. SOLAR CELL MODULE • Glass-epoxy • ¼” foam core • Plexiglas cover

  9. SHELVING SYSTEM • Mimic EYASSAT NanoSat Modules • Separate power requirements • Carbon fiber-epoxy laminate • Slide-out flanges: 3-ply • Brackets: 2-ply • Reduces structure volume and weight • ~ 7.5% more internal volume (vs. Nov. 22, 2008 launch)

  10. APRS LAYER • TinyTrak 4 • Radio • GPS Evaluation Board • Voltage Regulator • AA Battery Pack

  11. DATA COLLECTION LAYER • ¼” foam core • Data board: • PICAXE • Logomatic • Voltage Regulator • Internal/External Temperature Sensors • Pressure Sensor • AA Battery Pack

  12. SYSTEM INTEGRATION • Velcro mounting • 1 cross-board connection • On/off switch • 2 lid to payload connections • Solar cells • GPS antenna • External on/off switches • Payload weight at launch: • 3 lbs 11 oz

  13. FUTURE IMPROVEMENTS • Integrate data collection system into PC boards • Convertible payload • Reduce APRS volume to maximize space for collecting data • Fabricate sun sensor module • Improve thermal regulation

  14. QUESTIONS

  15. ATTITUDE DETERMINATION Andrew Grant

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