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ARMADILLO – SHOT II
The University of Texas at Austin
Travis ImkenShaina Johl
Christopher McBrydeTravis Sanders
June 29, 2012Boulder, CO
Mission Overview
• Verify that the CDH runs, uses SD card, manages subsystems, records data
• Validate COM uplinking/downlinking
• Confirm that EPS provides steady 3.3V, 5V lines
• Gather FOTON GPS data to compare to previous experiments.
• Pressure/temp sensor integrated
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• The SHOT II payload contains identical or very similar hardware to ARMADILLO flight design.
• The CDH, EPS, and GPS subsystems and NVS camera same as flight
• The COM is half-duplex version of flight. NVS lens is similar.
Design
• EPS system from ARMADILLO running multiple subsystems.
• Data collected in flight autonomously and recorded to SD card.
• Payload pinged via uplink to downlink dummy voltage data and magnetometer measurements.
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Design
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EPS
CDH
Magnetometer
GPS
NVS
COM
Pressure/TempSensor
Design - Block Diagram
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Design - Hardware
• ADC – Honeywell HMR2300
• COM– Lithium 1 UHF radio
• CDH– Phytec phyCORE-LPC3250
System on a Module (SOM)– Kraken v 1.0 interface board
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Design - Hardware
• EPS– 5V and 3.3V supply at 30W-hr– 6 Varta PoLiFlex 503759C
lithium polymer battery cells• GPS
– Dual frequency receiver• NVS
– Matrix Vision mvBlueFOX-M121G
– Edmund Optics 12mm lens• Pressure/temp sensor
– Honeywell 0-15psia package
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Test Data
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0 10 20 30 40 50 60 70 807
7.1
7.2
7.3
7.4
7.5
7.6
Time (minutes)
Volta
ge (V
)
Discharging Curve with Electronic Load: constant current of 1.0A on 5V bus
Expected Results
• Recorded results from the magnetometer at 10 Hz
• Images from the camera every 30 seconds
• COM beacon roughly every 45 to 50 seconds
• Downlink data and turn on/turn off beacon upon ground command
• GPS readings from FOTON for post-launch analysis
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• Pressure data to correlate with GPS altitude (and temperature)
Demonstration
Questions?
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