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HA1L High Altitude 1U Laboratory

HA1L High Altitude 1U Laboratory. University of Michigan Tom Heine Ted Lorts Hrishikesh Shelar. Mission Overview. The central avionics of CADRE are included on HA1L and will demonstrate the following capabilities: Software modes Sensor and health checkouts Solar cells charging batteries

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HA1L High Altitude 1U Laboratory

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  1. HA1LHigh Altitude 1U Laboratory University of Michigan Tom Heine Ted Lorts HrishikeshShelar

  2. Mission Overview • The central avionics of CADRE are included on HA1L and will demonstrate the following capabilities: • Software modes • Sensor and health checkouts • Solar cells charging batteries • UHF commanding and file transfer • Beaconing and GPS tracking • Watchdog-triggered reset • Post-processed attitude determination

  3. Mission Expectations • Expectations at Launch: • Receive beacons every 10sec • Command heartbeat and file downlink • Demonstrate autonomous reset in the absence of heartbeat • Demonstrate charging of batteries from solar panels • Operate CDH, EPS, and COM systems entire flight • Maintain internal (aluminum), external (foam), and antenna structural integrity entire flight • Known Issues at Launch: • No GPS fix (discovered Friday night…) • No ADCS FPGA • No board telemetry points (temperature, voltages)

  4. Mission Performance • Actual Operation: • Receive beacons every 10sec ✔ • Command heartbeat and file downlink ✖ • Demonstrate autonomous reset in the absence of heartbeat✔ • Demonstrate charging of batteries from solar panels ✔ • Operate CDH, Battery, and Com systems entire flight ✔ • Maintain internal (aluminum), external (foam), and antenna structural integrity entire flight ✔

  5. Mission Results Mission Ops • Beacons received every 10 sec with 89.8% packet receipt by ground station. • Observed two autonomous resets by the watchdog timer in telemetry beacon (triggered by actual FCPU errors). • FCPU, power system, and radio beacon operated the entire flight. • Ground system was unable to command the flight payload. Potential causes: • Ground system transmitter was not powerful enough. • Never accounted for effect of noise from board stack inside aluminum enclosure (modeled enclosure only). • Possibly mis-interpreted “chase test” results

  6. Mission Results Battery Charging • Analysis Assumptions: • Same power load during testing and operation • Battery discharge profile is linear over this time period

  7. Mission Results Communication

  8. Mission Results Communication

  9. Mission Results Structural Integrity Solar Panels in great shape! Antenna holding strong!

  10. Mission Results Structural Integrity Lost top clip OUCH!

  11. Now the good stuff…

  12. Now the good stuff…

  13. Thank you AFRL and COSGC!

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