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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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