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Critical Design Review Team Skyhawk

Critical Design Review Team Skyhawk. Fort Lewis College Adam Baker, Nick Laitsch, Bill Fellman. Mission Overview. Our objective is to monitor and record: Beta and Gamma radiation levels. Component temperatures. Current draw. Acceleration.

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Critical Design Review Team Skyhawk

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  1. Critical Design ReviewTeam Skyhawk Fort Lewis College Adam Baker, Nick Laitsch, Bill Fellman

  2. Mission Overview Our objective is to monitor and record: • Beta and Gamma radiation levels. • Component temperatures. • Current draw. • Acceleration. • Orientation, location and altitude. • Video of the entire flight. • We expect to learn what current radiation levels are at different altitudes. • We intend to learn how our satellite behaves in extreme climates. Fort Lewis College

  3. Mission Requirements Fort Lewis College

  4. ARDUINO MEGA OPERATION LOOP Fort Lewis College

  5. CAMERA OPERATION LOOP Fort Lewis College

  6. BalloonSat Chassis Fort Lewis College

  7. Initial Chassis Mock-Up • Components affixed w/zip-ties to display scale (Arduino Mega & GPS shield mounted). • Units will be mounted vertically along spine axis. • Balloon cord to be routed through plastic tube terminated in machined teflon bushings top and bottom (not shown). • Impact-absorbing outer shell will be a foam cylinder or sphere w/conical openings at top and bottom for camera/Geiger mounts. Fort Lewis College

  8. Subsystems Overview • Cameras • Record 1280x960 HD video of entire flight from five vantages. • Two facing up with a half-frame-rate staggered start to capture the balloon rupture. • Two facing horizontally to capture vistas. • One facing down. • Store video in 5 minute blocks. • Geiger Monitoring & Recording • Record to SD card shield every 10 seconds. • Self Monitoring • Record GPS, Temperature, heading and Voltages every 10 seconds. • Record Acceleration every 10 seconds initially, constantly after 80k feet. • Timing interval may depend on data storage capacity. • Data stored on GPS shield’s SD card. • Power • Minimum constant supply rating of 2W. • Heating • Maintain temperatures of 15°C ± 5°. Fort Lewis College

  9. Arduino Mega Controller Schematic Fort Lewis College

  10. Camera Module Schematic All components for Camera module shown. Transistor switching for each of 2 buttons per camera. On-board video storage via Sdmicro simplifies implementation. Cameras are marked as ?. Fort Lewis College

  11. Geiger Counter Schematic Fort Lewis College

  12. Geiger tube Wiring Diagram Fort Lewis College

  13. Major Components List Fort Lewis College

  14. Budget Fort Lewis College

  15. Management Fort Lewis College

  16. Electrical Test Plans Freezer & Vacuum testing • Heaters, cameras, data storage, Geiger tube performance. • Battery longevity. • Heat dispersion & regulation. • Current draw monitoring. Ancillary Testing Materials • Arduino with data storage shield. • Dry ice or freezer. • Vacuum Chamber. Potential points of failure • Freezing. • Battery failure. • Data write errors. Fort Lewis College

  17. Mechanical Test Plans Whip it • Drop it on a rope, see what breaks. Drop it • Watch it fall, see what breaks. Pitch it • Throw it down the stairs, see what breaks. Potential points of failure • Fracture. • Separation. • Deflated ego. Fort Lewis College

  18. Conclusions Concerns • We’re still waiting on the Geiger tubes. • Need shielding for the high voltage supply. • Need lots of testing on heaters. Closing remarks • We’re looking forward to testing. • Some of the code is already complete. • Spray foam test runs have already been evaluated. • 2 liter soda bottles work well for our desired shape and size. Fort Lewis College

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