Transcript Material Configuration

High Altitude Balloon
Payload Design Project
Summer 2012
Design Team:
Jen Hoff (EE)
Kate Ferris (EE)
Alison Figueira (CS)
Makenzie Guyer (CS)
Kaysha Young (ME/MET)
Emily Bishop (ME)
Advisors:
Dr. Brock J. LaMeres -Electrical & Computer Engineering
Dr. Angela Des Jardins -Montana Space Grant Consortium
Hunter Lloyd -Computer Science
Robb Larson -Mechanical & Industrial Engineering
Sponsor:
NASA
Mission Objective
To collect measurements
at high altitudes of
atmospheric
temperature and
pressure, the internal
temperature and
dynamic movement of a
payload that meets HASP
flight requirements.
Budget: $500
Schedule: 8 Weeks
6/4/12 -7/27/12
Mission Requirements
Functional Requirements
Log/Store data from the sensors on a non-viotile storage device
Power Sensors and any electronics needed to run these sensors
Protect the system from environmental conditions
Protected from the impact upon landing/jerk from the balloon
pop
Provide state of health information of the system
Performance Requirements
Consume 7 watts in order to accurately represent the research
team’s thermal output
Log data from the temperature and pressure sensors at a rate of
1 measurement per second
Log data from the accelerometers at a rate of 3 measurements
per second
Provide insulation to keep the internal temperature between -40
C and 60C
Must provide at least 4 hours of power for the duration of the
setup, flight, and recovery time.
Must withstand an vertical force of 10 G and a horizontal force of
5G
Physical Requirements
Must weight 1.62 kg
Maximum Total Volume: 15 cm x 15 cm x 30 cm
Must mechanically interface with the HASP payload plate in addition to
the BOREALIS system
Reliability Requirements
Must be able to survive preliminary tests and two launches
System Architecture
2012 Payload
Computer System
Electrical System
Mechanical System
Computer System
2012
Payload
Computer System
Computer
System
Electrical
System
Mechanical
System
Logging Data
SD Card
SD Shield
Interpreting Data
Reading from
Sensors
Computer Design
Specifications
• Interpreting Data
– Must be able to retrieve and store sensor data for 4 hours
– Temperature data must be retrieved and logged every
second
– Pressure data must be retrieved and logged every second
– Accelerometer data must be retrieved and logged 3 times
every second
– Gyroscope data must be retrieved and logged 3 times every
second
• Logging Data
– SD Card
» Must operate between -40C and 60C
» Must have enough storage for data
» Must be compatible with SD Shield
– SD Shield
» Must operate between -40C and 60C
» Must be compatible with computer board
» Should have a Real Time Clock
• Reading from Sensors
– Must have enough I/O pins for sensors
– Must operate between -40C and 60C
•
Concept:
–
–
Interpreting Data &
Reading from Sensors:
• Computer Board
Logging Data:
• SD Card
• SD Shield
Computer Boards
• Choice 1:
– Arduino Mega 2560
•
•
•
•
•
•
•
Price: $54.95
Digital I/O: 54 pins
Analog I/O: 17 pins
Clock Speed: 16MHz
SRAM: 8KB
Flash: 256KB
Dimensions: 4” x 2.1”
Computer Boards (Cont.)
• Choice 2:
– Arduino Uno
•
•
•
•
•
•
•
Price: $29.95
Digital I/O: 14
Analog I/O: 6
Clock Speed: 16MHz
SRAM: 2KB
Flash: 32 KB
Dimensions: 2.7” x
2.1”
Computer Boards (Cont.)
• Choice 3:
– Orangutan SVP-1284
•
•
•
•
Price: $99.95
GPIO: 21
SRAM: 2KB
Dimension: 3.7” x 2.2”
Computer Board Decision
Computer Boards
Unit
Importance
Arduino Mega 2560 R3 Rating
Factor
Arduino Uno
Rating
Factor
Orangutan SVP-1284 Rating
Factor
Cost
Weight/Size Language Support I/O
3
3
5
5
5
4
9
9
15
12
45
45
7
7
9
9
21
21
45
45
3
7
5
6
9
21
25
30
Total
4
6
24
9
36
7
28
126
147
104
SD Shields
• Choice 1:
– Adafruit Data Logging
Shield for Arduino
• Price: $19.50
• Dimensions: 2.7” x 2”
• Additional: Real Time
Clock
SD Shields (cont.)
• Choice 2:
– Seeed Studio SD
Shield
• Price: $13.90
• Dimensions: 2.25” x
1.8”
• Additional: SDHC
support
SD Shields (cont.)
• Choice 3:
– Your Duino SD Shield
• Price: $8.50
• Dimensions:
• Additional: Works
with Arduino Uno
SD Shield Decision
SD Card Shields
Unit
Importance
Adafruit Data Logger
Rating
Factor
Seeed Studio SD Shield Rating
Factor
Your Duino SD Shield
Rating
Factor
Cost
Weight/Size Support Compatibility Clock
Total
3
3
5
5
4
3
5
8
8
10
9
15
40
40
40
144
5
6
4
7
0
15
18
20
35
0
88
7
6
4
7
0
21
18
20
35
0
94
SD Card Storage
•
Pressure:
–
–
–
–
–
•
Temperature:
–
•
Same as Pressure, 2 sensors = 1,267,200B for 4 files
Accelerometer:
–
–
–
–
–
•
Example Line: “2012/6/6 13:30:25,10”
20 characters + ‘\0’ + ‘\n’= 22B per line
Every Second, 14,400s (4hr) = 14,400 lines per file
316,800B per file
2 trips = 633,600B for 2 files
Example Line: “2012/6/6 13:30:25,10,10,10”
26 characters + ‘\0’ + ‘\n’= 28B per line
3 times every second, 14,400s (4hr) = 43,200 lines per file
1,209,600B per file
2 trips = 2,419,200B for 2 files
Gyroscope:
–
–
–
–
–
Example Line: “2012/6/6 13:30:25,10,10,10,10”
29 characters + ‘\0’ + ‘\n’= 31B per line
3 times every second, 14,400s (4hr) = 43,200 lines per file
1,339,200B per file
2 trips = 2,678,400B for 2 files
SD Storage
Size
Sensor
Pressure
633600
Temperature
1267200
Accelerometer 2419200
Gyroscope
2678400
Total
6998400
6,998,400B = 6.67419434MB
So the smaller SD cards (200MB to
500MB) should have enough storage.
SD cards
• Choice 1:
– Themis Series
• Prices: $26 to $62
• Storage: 128MG to
2GB
• Write Speed:
17.21MB/s
• Access Time: 1ms
SD cards (cont.)
• Choice 2:
– Delkin Devices
• Prices: $21.95 to
$45.57
• Storage: 512MB to
2GB
• Write Speed: Not
listed, probably
~17MB/s
SD cards (cont.)
• Choice 3:
– Sea Level
• Price: $34.95
• Storage: 1GB
• Write Speed: Not
listed, probably
~17MB/s
SD Card Decision
SD Cards
Unit
Importance
Themis Series Rating
Factor
Delkin Devices Rating
Factor
Sea Level
Rating
Factor
Cost
Storage
3
5
15
6
18
3
9
Reliability Availability Total
7
8
9
9
4
2
63
32
18
128
9
5
5
63
40
45
166
9
5
5
63
40
45
157
Final Decision
• Computer Board: Arduino Uno
• SD Shield: Adafruit Data Logger
• SD card: Delkin Devices SD card
Design
Start
Retrieve Pressure
Data
Setup: Define Sensors,
start RTC and timers
Interpret Data
Functions follow
same format as
Pressure
Loop: Update
Timers
Store in
RAM
Temperature
A Timer
goes off
Accelerometer
Gyroscope
Event
Store on SD card,
with timestamp
Back to main program
Testing
• Test 1:
– Connecting sensors to
board
– Reading from sensors and
interpreting data into a
useful format
• Test 2:
– Creating a timer for each
sensor, testing efficiency
– Test the Real Time Clock on
SD shield
– Test writing to the SD card
• Test 3:
– Testing each sensor
individually with writing to
the SD card
– Testing each sensor
individually with the timer
and writing to SD card.
• Test 4:
– Testing all sensors and
timers with writing to SD
card.
Budget
Material
Cost
Shipping
Total
Arduino Uno R3
$29.95
$13.25
$43.20
Adafruit Data Logger
$19.50
$0.00
$19.50
Industrial SD Card
$0.00
$0.00
$0.00
Total
$62.70
Electrical System
2012
Payload
Computer
System
Electrical
System
Electrical System
Mechanical
System
Sensors
Interfacing
Power
System
Batteries
Temperature
Pressure
Movement
Acceleration
External Temperature Sensor
Specifications
 Must be able to operate and measure
between -55C and 60C
 Must be able to read from the sensor
every second
Decision Points
 Temperature Range
 Accuracy
 Cost
External Temperature Sensor
Choice #1
 MAX6605
Price: $0.96
Range: -55 to 125degC
Temp. Error: +/- 5.8degC
Supply Voltage: 2.7V to 5.5V
Supply Current: 4.5 uA
External Temperature Sensor
Choice #2
 TMP124
Price: $1.62
Range: -40 to 125degC
Temp. Error: +/- 1.5degC
Supply Voltage: -.3V to 7V
Supply Current: 10mA
External Temperature Sensor
Choice #3
 DS18S20
Price: $5.19
Range: -55 to 125degC
Temp. Error: +/- 2degC
Supply Voltage: 3V to 5.5V
Active Current: 1mA to 1.5mA
External Temperature Sensor
Decision Matrix
External Temp.
Sensors
MAX6605
TMP124
DS1820
Function Units
Temp. Range
Accuracy
Cost
Importance
5
5
4
Rating
9
3
9
21
Factor
45
15
36
96
Rating
2
9
9
20
Factor
10
45
36
91
Rating
9
9
7
25
Factor
45
45
28
118
Final Selection: DS18S20
Temperature Sensor
Total
Internal Temperature Sensor
Specifications
 Must be able to measure in the range of
-40C to 60C
 Must be able to read from the sensor
every second
Decision Points
 Temperature Range
 Accuracy
 Cost
Internal Temperature Sensor
Choice #1
 LM35CAZ
Price: $5.60
Range: -40 to 110degC
Temp. Error: +/- .3degC
Supply Voltage: 4V to 30V
Internal Temperature Sensor
Choice #2
 497-1583-1-ND
Price: $1.30
Range: -40 to 100degC
Temp. Error: +/- 1degC
Supply Voltage: 2.98V
Internal Temperature Sensor
Choice #3
 LM35CH
Price: $11.35
Range: -40 to 110degC
Temp. Error: +/- .5degC
Supply Voltage: 4V to 30V
Internal Temperature Sensor
Decision Matrix
Internal Temp.
Sensor
LM35CAZ
497-1583-1-ND
LM35CH
Function Units
Temp. Range
Accuracy
Cost
Importance
5
5
4
Rating
9
9
7
25
Factor
45
45
28
118
Rating
9
5
9
23
Factor
45
25
36
98
Rating
9
7
6
22
Factor
45
35
24
104
Final Selection: LM35CAZ
Temperature Sensor
Total
Gyroscope
Specifications
 Must measure in a 3-D coordinate system
Decision Points
 Interfacing
 Sensitivity
 Measurement Range
 Temperature Range
 Cost
Gyroscope
Choice #1
 551-1080-1-ND
Price: $9.38
Range: +/- 2000deg/sec
Sensitivity: 1.33deg/sec
Operating Temp: -40 to 85degC
Voltage Supply: 2.5V to 3.0V
Size: 3.1x4.1x.83 mm^3
Gyroscope
Choice #2
 L3G4200D
Price: $29.95
Range: +/- 2000deg/sec
Sensitivity: 70mdps
Operating Temp: -40 to 85degC
Voltage Supply: 2.4V to 5.5V
Size: .5x.9in
Gyroscope
Choice #3
 L3GD20
Price: $8.48
Range: +/- 2000deg/sec
Sensitivity: 70mdps
Operating Temp: -40 to 85degC
Voltage Supply: 2.4V to 3.6V
Size: 4x4x1 mm
Gyroscope Decision Matrix
Gyroscope
551-1080-1-ND
L3G4200D
L3GD20
Function
Units
Interfacing
Temp.
Range
Sensitivity
Measurement
Range
Cost
Importance
5
5
4
5
4
Rating
6
9
5
9
7
36
Factor
30
45
20
45
28
168
Rating
9
9
7
9
5
39
Factor
45
45
28
45
20
183
Rating
5
9
7
9
8
38
Factor
25
45
28
45
32
175
Final Selection: L34200D
Gyroscope
Total
Sensor’s DC/DC converter
Specifications
 Output Voltage: 3.3V
Decision Points
 Interfacing
 Power Rating
 Output Current
 Cost
Sensor’s DC/DC Converter
Choice #1
 IK1203SA
Price: $5.00
Output Voltage: 3.3V
Output Current: 75.7 mA
Input Voltage: 10.8V to 13.2V
Power Rating: 250mW
Size: .24x.46 in
Sensor’s DC/DC Converter
Choice #2
 OKI-78SR-3.3/1.5-W36-C
Price: $4.39
Output Voltage: 3.3V
Output Current: 1.5A
Input Voltage: 7V to 36V
Power Rating: 4.95W
Size: .41x.65in
Sensor’s DC/DC Converter
Choice #3
 PT5103N
Price: $12.21
Output Voltage: 3.3V
Output Current: 1A
Input Voltage: 9V to 26V
Size: 1x1.02in
Sensor’s DC/DC Converter
Decision Matrix
Voltage Regulators
IK1203SA
OKI-78SR-3.3/1.5W36-C
PT5103N
Function
Units
Power
Rating
Interfacing
Output
Current
Cost
Total
Importance
Rating
Factor
Rating
Factor
Rating
Factor
4
9
36
5
20
7
28
4
8
32
9
36
8
32
3
7
21
8
24
8
24
3
9
27
9
27
7
21
33
116
31
107
30
105
Final Selection: IK1203SA DC/DC
Converter
Computer’s DC/DC Converter
Specifications
 Must give a steady output voltage
between 7V and 12V
 Want a Switcher
Decision Points
 Interfacing
 Power Rating
 Output Current
 Cost
Computer’s DC/DC Converter
Choice #1
 JCA0212D02
Price: $18.20
Operating Range: -40 to
60degC
Input Range: 9V to 18V
Power: 2W
Output Voltage: 12V
Computer’s DC/DC Converter
Choice #2
 ISP1212A
Price: $18.00
Operating Range: -40 to
60degC
Input Range: 9V to 18V
Power: 2W
Output Voltage: 12V
Computer’s DC/DC Converter
Choice #3
 NTFS1212MC
Price: $12.11
Operating Range: -40 to
60degC
Input Range: 9V to 15V
Power: 1W
Output Voltage: 12V
Computer’s DC/DC Converter
Decision Matrix
DC/DC Converters Function
Units
Interfacing
Power
Rating
Output
Current
Cost
Total
Rating
4
8
5
6
3
8
3
7
31
Factor
32
30
24
21
107
Rating
8
6
9
7
30
Factor
32
30
27
21
110
Rating
9
9
8
9
35
Factor
36
45
24
27
132
Importance
JCA0212D02
ISP1212A
NTFS1212MC
Final Selection:
NTFS1212MC
Accelerometer
Specifications
 Measure in a 3D coordinate plane
 Need to measure up to 8 G’s
Decision Points
 Interfacing
 Sensitivity
 Number of Axes
 Cost
Accelerometer
Choice #1
 ADXL312
Price: $11.16
Number of Axes: 3
Range: ±12g
Sensitivity: 39 LSB/g
Bandwidth: up to 3.2kHz
Accelerometer
Choice #2
 BMA180
Price: $29.95
Number of Axes: 3
Range: ±8g
Sensitivity: 1024 LSB/g
Bandwidth: up to 1.2kHz
Accelerometer
Choice #3
 ADXL345
Price: $7.75
Number of Axes: 3
Range: ±8g
Sensitivity: 57 LSB/g
Bandwidth: up to 3.2kHz
Accelerometer
Decision Matrix
Accelerometer
ADXL312
BMA180
ADXL345
Function
Units
Interfacing
Sensitivity
Number of Cost
Axes
Importance
3
5
5
4
Rating
7
4
9
7
27
Factor
21
20
45
28
114
Rating
9
9
9
6
33
Factor
27
45
45
24
141
Rating
7
4
9
9
29
Factor
21
20
45
36
122
Final Selection: BMA180
Accelerometer
Total
Pressure Sensor
 Specifications
 The pressure sensor must be able to
measure the pressure at 30,480m or
100,000ft above sea level
 Decision Points
 Interfacing
 Range
 Sensitivity
 Cost
Pressure Sensor
Choice #1
 SSCSANN005PG3A3
Price: $30.05
Operating Range: -20 to
60degC
Input Voltage: 3.3V
Accuracy: 2%
Measurement Range: 0psi
to 15psi
Pressure Sensor
Choice #2
 MPX5100
Price: $9.27
Operating Range: -40 to
125degC
Input Voltage: 5V
Accuracy: 2.5%
Measurement Range: 0 to
100kPa
Pressure Sensor
Choice #3
 HSCDANN030PGAA5
Price: $35.45
Operating Range: -20 to
85degC
Input Voltage: 5V
Accuracy: 1%
Measurement Range: 0psi
to 30psi
Pressure Sensor
Decision Matrix
DC/DC Converters
SSCSANN005PG3A3
MPX5100
HSCDANN030PGAA5
Function
Units
Interfacing
Range
Accuracy
Cost
Importance
4
5
3
3
Rating
8
9
9
3
29
Factor
32
45
27
9
113
Rating
6
8
5
8
27
Factor
24
40
15
24
103
Rating
6
9
7
3
25
Factor
24
45
21
9
107
Final Selection:
SSCSANN005PG3A3
Total
Batteries
Specifications
 Must supply up to 4hrs of power
 Must supply between 9V and 18V
Decision Points
 Weight
 Interfacing
 Temperature Range
 Cost
Batteries
Choice #1
 Energizer Advanced
Lithium
Price: $1.69/battery
Range: -40 to 60degC
weight: 14.5g
Output Voltage: 1.5V
Batteries
Choice #2
 Energizer Ultimate
Lithium
Price: $2.27/battery
Range: -40 to 60degC
weight: 14.5g
Output Voltage: 1.5V
Batteries
Choice #3
 Kodak Max Lithium
Price: $1.97 /battery
Range: -40 to 60degC
weight: 12g
Output Voltage: 3V
Battery
Decision Matrix
Battery Names
Function
Units
Weight
Temp.
Range
Interfacing
Cost
Importance
4
5
3
4
Energizer Advanced
Lithium
Rating
8
9
9
9
35
Factor
32
45
27
36
140
Energizer Ultimate
Lithium
Rating
8
9
9
7
33
Factor
32
45
27
28
132
Kodak Lithium
Rating
9
9
6
8
32
Factor
36
45
18
32
131
Final Selection: Energizer
Advanced Lithium Batteries
Total
Testing
 Burn In Test
 Breadboard the design and power the circuit
and see how long the batteries will last.
 DC/DC converter test
 Test to make sure the DC converters are
outputting the right values.
 Cold test
 Put the fully manufactured circuit inside the enclosure and
place the enclosure inside the cold lab.
Budget
Sensors(+shipping): $152.85
Batteries:
$80.00
Battery Boxes:
$6.00
PC Board:
$12.00
Wires:
$7.00
Total:
$257.85
Mechanical System
2012
Payload
Mechanical System
Computer
System
Electrical
System
Mechanical
System
Structural
System
Enclosure
Thermal
Material
Vibrations
Attachment
Impact
Structure
Temperature
Mechanical Systems
Requirements
Thermal
Structural System
i. Must be similar to the MSU HASP Research Team
structure materials
1.Polystyrene must be used for the insulation
(approx. 1 cm thickness)
2.A shiny reflective aluminum coating should
be applied
3.Additional material or support structures
will be needed to make the structure strong
ii. The internal temperature of the payload must be
kept between -40 C and 60 C
i. Enclosure
1. The external volume may not exceed 5.875 in x
5.875 in x 11.8 in (15 cm x 15 cm x 30 cm)
2. The internal volume must be at least 131.6 in3 : 4.5
in x 4.5 in x 6.5 in
ii. Vibrations
1. Must be able to withstand frequencies of 20-2000
Hz
iii. Attach Enclosure Structure
1. HASP
1. Enclosure must securely attach to HASP Plate
and not be disconnected for the duration of the
flight
2. Must be easily attached and unattached
from the ASP plate for ease of assembly and
disassembly
2. BOREALIS
1.Must attach to the BOREALIS rope connection
system
iv. Impact Forces
1. Must withstand a vertical impulse force of 10 G’s
2. Must withstand a horizontal impulse force of 5 G’s
3. Must withstand a force of 7.25 G’s due to cross
winds at 100 Mph
Thermal Considerations
Temperature
profile
Estimated outside
Temperature of the Box
Radiation Energy from Space
&
Radiation Energy from Earth
(from ambient Temperatures of
the Earth and Sun)
Q
Tearth = 293 K
Tspace = 2 K
    As   Tbox  Tspace.earth

4
4

Thermal Considerations
Energy Balance
(Sun hitting 3 sides)
Qcond1
(Sun hitting 1 side)
  3  G  Ab  Qpower  2  Qspace  Qearth 
6
Qcond2
  G  Ab  Qpower  4  Qspace  Qearth 
6
Average theoretical Temperature
inside the box with Rvalue = 3 m^2*K/W
Tin
Trange1 = ( 40, -10 ) °C
Qcond Rtotal
Atotal
 Tbox
Trange2 = ( 33, -32 ) °C
Surface Properties
Reflective Material
Emissivity
(ε)
Absorptivity (α)
α/ε
Aluminum Foil
0.05
0.15
3
Reflective Aluminum Foil
tape
0.05
0.15
3
Silver Reflective Tape
0.02
0.0044
0.22
Decision Matrix – Reflective Material
Decision Matrix: Reflective Material
Weight
Factor
Aluminum Foil
Number Total
Reflective Foil
Tape
Enerflex
Number
Total
Number
Silver Reflective
Tape
Total Number
Total
Cost
4
5
20
2
8
4
16
4
16
Ease Manufacturability
4
3
12
3
12
4
16
4
16
5
5
25
3
15
4.5
22.5
4
20
5
4
20
3.5
17.5
4
20
5
25
Availability
5
5
25
3
15
5
25
3
15
Reliability
4
3
12
3
12
4.5
18
4.5
18
Compatible with
electronics
4
5
20
2
8
5
20
5
20
Compliance w/ Research
Team
Emissivity (lower =
better)
Totals
134
87.5
137.5
130
Decision Matrix - Insulation
Decision Matrix: Insulation
Weight Factor
Polystyrene Extruded
Polystrene - Expanded
Polyisocyanurate
Number
Total
Number
Total
Number
Total
Cost
4
3
12
4
16
3
12
Ease Manufacturability
4
4
16
4
16
4
16
Compliance w/ Research
Team
5
5
25
5
25
4
20
Weight
3
3
9
3
9
3
9
Reliability
4
4
16
4
16
4
16
Surface tape can stick to
4
3
12
3
12
3
12
Compatible with electronics
4
5
20
5
20
5
20
Totals
110
114
105
Material Configuration
A.)
C.)
Reflective
Material
Insulator
Material
B.)
Reflective
Material
Plaskolite
D.)
Reflective
Material
Reflective
Material
Fiber Glass
Cloth
Insulator
Material
Plaskolite
Insulator
Material
Fiber Glass
Cloth
Insulator
Material
Decision Matrix – Structural
Support
Decision Matrix: Structural Support - any number of these can be combined
Weight
Factor
Rebar (3/8)
Number Total
Rebar Wire
Plaskolite
Number
Total
Number
Fiber glass cloth
Total Number
•L Bracket
Total •Number •Total
Cost
4
4
16
4.5
18
4
16
2
8
•4
•16
Ease Manufacturability
4
3
12
4
16
3
12
3
12
•3
•12
Added Strength
4
4
16
3.5
14
4
16
4.5
18
•4
•16
Interference with
thermal properties of
insulation (lots of
interference = bad)
4
1
4
5
20
5
20
4
16
•4
•16
Ease of integrating with
other materials
3
3.5
10.5
4
12
4
12
4
12
•4
•12
Weight (low = better)
4
2
8
4
16
4
16
4
16
•3.5
•14
Availability
5
5
25
5
25
5
25
4
20
•5
•25
Reliability
4
5
20
4
16
3.5
14
5
20
•4.5
•18
122
•
•129
Totals
111.5
137
131
Structure Configurations
L Brackets for stability and form
Rebar wire for stability and form
Preferred Configuration – Material
Placement
Plaskolite
Shell
Reflective
Material
Polystyrene
- Extruded
Preferred Configuration – Structural
Support
Mechanical System - Testing
Type of Test
What will be Tested
*Drop Test
- Accelerometers
- Structure components
*Vibrametor Test
-Structure components
*Long Term Thermal Test
*Emittance Test
*Surface Thermal Test
-Insulation
-Reflective coating’s surface
properties
-Heat transfer and
absorptivity of insulation and
reflective coating
Mechanical Systems Mass Budget
Mechanical Systems Mass Budget
Quantity Weight/Piece (g) Total Weight
Extruded Polystyrene
1
150
150
Plaskolite Polystyrene
Light Panel
1
73
73
16.5 gauge Rebar Tie
Wire
8
0.9925
7.94
Brackets
4
22.68
90.72
Bracket Mounting
Hardware
8
26.84
214.72
HASP Mounting
Material
1
232
232
CCA Stack Mounting
Standoff
16
5.9
94.4
Total Mass
862.78
Mechanical System Budget
Material
Cost
$12.25
Extruded Polystyrene
Plaskolite Polystyrene
$6.47
Light Panel
16.5 gauge Rebar Tie
$4.25
Wire
Reflective Aluminum Foil
$12.99
tape
Assembly Materials
$38.40
Emergency Funds
$30.64
Total $105.00
Over-all Preliminary Preferred
Configuration
Project Mass Budget
PROJECT MASS BUDGET
May Not Exceed 1620 g
System
Mass (g)
Mechanical Systems
862.78
Computer Systems
90.72
Electrical Systems
400
Systems Total
1353.5
Mass to be Added
266.5
PROJECT BUDGET
PROJECT BUDGET
Not to exceed $500
System
Cost ($)
Mechanical
105.00
Computer Science
62.70
Electrical
257.85
Total
425.55
Additional Funds Available
74.45
Project Schedule