Pegasus MSFSatElysiumLaunch Readiness Review
Jordan Burns, Brenden Hogan, Miranda Link, Cody Spiker, Chris Dehoyos, Hemal SemwalNovember 1st, 2011
Mission OverviewMission Statement:
• “To test the effects of high altitude flight upon a closed container containing Streptococcus mutans bacterium, and recording their response to discover if harsh high altitude effects bacterial reproduction and survival.”
Why?• To test the validity the of the recorded results of the 1967 flight of
Surveyor III.
Design Overview• 21x21x12 cm• 2 levels• 6 different samples, 3
locations with varying conditions
• Motorized door• 4 sensors (2)
• Temperature• Pressure• Visible Light
Hardware/Software Testing• Software / Hardware Testing
• No major problems occurred with our software, besides getting everything to run right.
• FIX: • Trial and Error testing and corrections
• Cooler Test• Data collected from all sensors-compared to control data• EXCEPT HOBO
• Malfunction: only programmed to output voltage readings, not temperature and humidity
Time 300 660 1020 1380 1740 2100 2460 2820 3180 3540 3900 4260 4620 4980 5340 5700 6060 6420 6780 7140 75000
20
40
60
80
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120Cooler Test- Light vs. Time
Light
Box jolted
Box jolted
Open Door
Close Door
Average: 13
No Light: 0Absolute Light: 1024
Time 360 780 1200 1620 2040 2460 2880 3300 3720 4140 4560 4980 5400 5820 6240 6660 7080 75000
5
10
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45
Cooler Test- Temperature(inside) vs. Time
Temp_in(electronics)
Close Door
Open Door
Average: 33.5 degrees Celsius
Time 360 780 1200 1620 2040 2460 2880 3300 3720 4140 4560 4980 5400 5820 6240 6660 7080 75000
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10
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35
Cooler Test- Temperature(door section) vs. Time
Temp_out(motor compartment)
Open Door
Close Door
Average: 25.3 degrees Celsius
Cooler Testing
Time 300 660 1020 1380 1740 2100 2460 2820 3180 3540 3900 4260 4620 4980 5340 5700 6060 6420 6780 7140 750083400
83500
83600
83700
83800
83900
84000
84100
84200
84300
Cooler Test- Pressure vs. Time
PressureOpen DoorClose Door
Average: 83788.67 Pascals
Cooler Testing
Incubation Testing • Each test has been overlapped in order
to isolate each potential problem that may occur.
• Multiple tests show the desired traits from a healthy culture are:• Translucent, White Colonies• Expansion Growth • Colony size larger than 1 mm
• After analysis of S. mutans, it was discovered that this strand is non-aerobic and a vacuum test would be inconclusive towards any results.
This is the Desired Culture
Flight Samples-To be tested• The actual flight cultures are going to be one day shy of full
maturity.
• This means that the actual cultures for flight will be grown on the Thursday before launch day, November 4, 2011.
• Being slightly immature, these cultures will be at their most vulnerable point of outside factors affecting their growth.
• Being exposed at this point means that after flight and exposure, any change in the bacteria will be the most noticeable.
Structural Testing• Drop/ Roll Test
• Our drop test revealed that our structure was NOT SOUND• The slits for our shelves were too deep• Our tape was not secure
• FIX: • Pre-cut BASES to slide the shelves in• Cleaner and more precise cuts were made, and
more efficient gluing.• Whip Test
• revealed that the solid faces of our structure could not support the pulling of the tether.
• FIX:• A wall that runs across the middle of the
CubeSat to give the wall support
Expected Results
• We expect to find that the bacteria will be resilient enough to survive both the extreme radiation and temperature environments.
• The samples will grow normally after the flight
Worries
1. Science Failure: The motorized door will not open. No light radiation will be let into satellite environment.
2. Structural Failure: The motorized door will rip off during burst
Requirements MatrixRequirements Description Origin
A Construct a BalloonSat that shall survive an ascent to 30 km above the surface of Earth and the following decent while maintaining complete functionality.
Mission
Statement
B Weight shall not exceed 850 grams, nor a budget of $370 ($250 + $20/ea out of pocket).
C SatElysium shall safely transport 6 samples of streptococcus mutans during its flight, to later study the effects of temperature and radiation in the stratosphere on the bacteria.
D Streptococcus mutans samples shall be recovered and analyzed post-flight.
E SatElysium shall carry a camera payload to document footage of the flight of the exterior of the satellite.