team six-pack launch readiness review
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Team Six-PackLaunch Readiness Review
Calder Lane, Courtney Ballard, Ian Thom, Thomas Green, Matt Cirbo, Janelle Montoya
11/1/11
Fall 2011
Rev A
08-16-11
Mission Overview
BalloonSat Helios measures
the efficiency of wireless
energy transmission
using a laser and
solar panels.
Design Overview
Two Foam Core Structures
Top Circuit:
Nine solar panels
3.3 volt Li-ion
50 mW red laser
Bottom Circuit:
One solar panel
Attopilot current and voltage sensor
Arduino Uno and SD shield.
Cold Test
0 1000 2000 3000 4000 5000 60000
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
Cold Test Voltage
Voltage
Time (seconds)
Vo
ltag
e (V
olt
s)
1 2 3
Sun-Laser Comparison Test
0 5 10 15 20 25 30 350.36
0.3650.37
0.3750.38
0.3850.39
0.3950.4
0.4050.41
Voltage with and without Laser
Voltage
Time (seconds)
Vo
ltag
e (V
olt
s) 2
3 1
HOBO Test
0 1000 2000 3000 4000 5000 6000 7000 8000 9000
-20
-10
0
10
20
30
40
Cold Test HOBO Temperature Readings
InternalExternal
Time (Seconds)
Tem
pera
ture
(°C
)
1 2
4 3
Camera Test
Camera worked, took over 600 pictures in two
hours.
Whip and Drag Tests
Whipped at about a two foot length to simulate flight
string motion.
Satellite dragged as a more accurate test of
the satellite’s predicted landing behavior.
Drop Test
Satellite dropped from second story to attain a speed of about 20 m/s.
Expected Results
• Cold test: More voltage as fog cleared–More laser light hitting panel
• Expect similar results on flight–Less atmosphere means better
transmission.
Biggest Worries
• Resolving amperage issue• Final assembly
Requirements
Weight: Under 850g? -> Negotiated for 50g extra -> Under 900g? Yes
Cost: Under $250? Yes
Able to record 90 minutes of data? Yes
Remains intact? Yes
Measures efficiency of laser transfer of energy? Yes
Temperature remains above 10°C? Yes
HOBO works? Yes
Camera works? Yes
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