Team Six-Pack Launch Readiness Review Calder Lane, Courtney Ballard, Ian Thom, Thomas Green, Matt...
-
date post
19-Dec-2015 -
Category
Documents
-
view
213 -
download
1
Transcript of Team Six-Pack Launch Readiness Review Calder Lane, Courtney Ballard, Ian Thom, Thomas Green, Matt...
Team Six-PackLaunch Readiness Review
Calder Lane, Courtney Ballard, Ian Thom, Thomas Green, Matt Cirbo, Janelle Montoya
11/29/11
Fall 2011
Rev A
08-11-11
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 3v 25mA Flexible Solar Panels
3.3 volt Li-ion battery
50 mW red laser
Bottom Circuit:
3v 22mA Flexible Solar Panel
Attopilot Current/Voltage Sensor
Arduino Uno and SD shield
3V 25mA Solar Panels (9)
3V 22mASolar Panel
50mW 650nm Laser
Battery
9-volt BatteryArduino Uno
Microprocessor
Micro SD Shield
Micro SD Card
AttoPilot Current/Voltage Sensor
HOBO
Thermometer
Barometer
Hygrometer
Li-Ion Battery
Switch
Rechargeable Battery
SD CardCamera
Switch
9-volt Battery (3) Switch Heating Circuit
Switch
Switch
Flight Results
0 1000 2000 3000 4000 50000
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8Flight Voltage
Flight Voltage
Time (seconds)
Vol
tage
(V
olts
)
• Sun rising, not hitting bottom solar panel
• Sun hits panel, drastic voltage increase
• Satellite enters troposphere
• Burst and wild motion
Flight Results
0 2000 4000 6000 8000 10000
-70
-60
-50
-40
-30
-20
-10
0
10
20Flight Temperature
Internal TemperatureExternal Temperature
Time (Seconds)
Tem
pera
ture
(°C
)
• Launches• Enters troposphere• Burst• Exits troposphere
Flight Results
• Launches• Enters troposphere• Burst• Exits troposphere
0 2000 4000 6000 8000 1000020
22
24
26
28
30
32
34
36
38
40Relative Humidity
Relative Humid-ity
Time (Seconds)
Rel
ativ
e H
umid
ity (
%)
Post-testing
• Arduino shuts off due to low temperature
• Satellite removed from the cooler
0 500 1000 1500 20000
2
4
6
8
10
12
-0.1
-0.05
0
0.05
0.1New Cold Test
Temperature
Voltage
Time (seconds)
Tem
pera
ture
(°C
)
Vol
tage
(V
olts
)
What failed and how? Arduino – Stopped sensing Heater – Lost power
What tests were done to confirm this? Second cold test Battery whip test
How has it been fixed? Arduino would have its own heater The heater batteries would be attached
better
Failure Analysis
Conclusions
• Wireless Energy Transfer – Possible, just inefficient using lasers and
photovoltaics– Much higher efficiencies could be achieved
using microwaves – Beaming focused radiation is an effective
means to transport electricity– However, changing EMR back to electricity is
less efficient
Conclusions
• Power Generating Satellites– Data indicated that the sun at higher altitudes
does produce more energy– Very possible to launch power generation
satellites into orbit– Orbiting solar farms could potentially be far
more efficient using different EM frequencies
Appendices
• Lessons Learned• Ready to Fly• Requirements• Mass and Money Budgets• Message to Next Semester
Lessons Learned
• Not done at launch– Still work to do after
• More solar panels on top• Heater in bottom box
– Prevent Arduino failure• One box instead of two• Control solar panel
Ready to Fly
• Stored in upward position– Larger box on top, smaller box below
• How to activate payload:– Camera button– Laser switch: ON– Solar panel switch: ON– Heater switch: ON– Arduino switch: ON
Requirements
Weight: Under 850g? -> Negotiated for 70g extra -> Under 920g? Yes
Cost: Under $250? No
Able to record 90 minutes of data? No
Remains intact? Sort of
Measures efficiency of laser transfer of energy? No
Temperature remains above 10°C? No
HOBO works? Yes
Camera works? Yes
Item Cost Weight Provided by/ Bought from
HOBO Datalogger Provided 30 grams Gateway to Space ClassFoam Core/Aluminum Tape
Provided 170 grams Gateway to Space Class
Canon SD780 IS Provided 130 grams Gateway to Space ClassHeater Provided 100 grams Gateway to Space ClassFlight/Test batteries Provided and bought with
personal funds150 grams Gateway to Space Class
Flight Tube Provided 10 grams Gateway to Space ClassSwitches Provided 20 grams Gateway to Space ClassDry Ice Bought with personal funds Not launched Supermarket
Arduino Uno $29.95 70 grams SparkfunAttoPilot Voltage and Current Sensor
$19.95 20 grams Sparkfun
Micro SD Shield $14.95 30 grams SparkfunMicro SD Card Donated <1 gram The Lane FamilyPowerfilm 3V 25mA Flexible Solar Panel (9)
$62.55 27 grams www.solarhome.org
Powerfilm 3V 22mA Flexible Solar Panel (1)
$6.75 3 grams www.solarhome.org
50mW 650nm Laser $18.04 100 grams www.ankaka.comCarbon Tubing $49.00 10 grams dragonplate.com3.7 Volt 2600 mAh LG Li-Ion 18650 Battery
$24.95 50 grams www.megabatteries.com
Shipping and Handling $35.63
Total $261.77 920 grams*
Message to Next Semester
• Pick a challenging, but achievable experiment
• Be prepared to work outside of class• Work hard, but don’t tire yourselves out pre-
launch• Make time for programming troubleshooting• Know data conversion factors• Make a schedule, and stick to it• Do HW #7 ahead of time