gons critical design review steven benedict jake danser josh hecht brock kowalchuk sean pomeroy erik...
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GONSCritical Design Review
GONSCritical Design Review
Steven Benedict
Jake Danser
Josh Hecht
Brock Kowalchuk
Sean Pomeroy
Erik Shuttlesworth
Matthew Zemel
October 17, 2007
Steven Benedict
Jake Danser
Josh Hecht
Brock Kowalchuk
Sean Pomeroy
Erik Shuttlesworth
Matthew Zemel
October 17, 2007
Mission Overview The GONS project includes sending a satellite to Near Space to conduct
experiments regarding stabilization, CCD camera imaging, and photovoltaic efficiency
GONS expects to discover an affordable means in which to stabilize BalloonSats traveling in the Earth’s stratosphere
Prove that CCD camera imaging of the stars is possible from altitudes of 20 - 30 kilometers
Discover whether a rigid or flexible photovoltaic cell is more economical for lightweight BalloonSat missions.
Mission Overview The GONS project includes sending a satellite to Near Space to conduct
experiments regarding stabilization, CCD camera imaging, and photovoltaic efficiency
GONS expects to discover an affordable means in which to stabilize BalloonSats traveling in the Earth’s stratosphere
Prove that CCD camera imaging of the stars is possible from altitudes of 20 - 30 kilometers
Discover whether a rigid or flexible photovoltaic cell is more economical for lightweight BalloonSat missions.
Mission StatementThe GONS BalloonSat shall ascend to an altitude of approximately 30 kilometers by means of a helium filled balloon where it shall record stabilized video capture and measure solar energy efficiencies to improve our understanding of stabilization, solar energy and
video recording methods in high altitude conditions.
Mission Objectives – Level 0
O1: Construct a BalloonSat to improve understanding of near space conditions with a mass less than or equal to 800.00g for less than $200 whose internal temperature will stay above 0° C in near-space conditions by 11/9/07.
O2: Shall stabilize the BalloonSat along the x-axis for video capture of a point along the horizon during the ascent.
O3: Compare efficiencies of flexible and rigid photovoltaic cells as a function of altitude in the range of approximately 1500 meters to 30 kilometers.
System Requirements – Level 1
S1: The BalloonSat shall be completed by November 9, 2007 and shall have a mass under 800g, cost less than $200, and shall stay above 0° C during the course of the flight.
S2: The BalloonSat shall eliminate spacecraft’s rotation about a vertical axis (parallel to the string) to within a 30° window (± 15°) during the entire ascent. (Goal 20° window)
S3: The BalloonSat Shall measure the output power of both types of solar cells during the course of flight. where efficiency is a measure of power output per unit surface area.
Component Price Shipping Total PC 180XP Cube Camera Donated By Eliot Young - - Micro Digital Video Recorder Donated By Eliot Young - - HOBO Donated By Professor - - Heater Donated By Professor - - Plastic Pipe Donated By Professor - - Foam Core Donated By Professor - - Metal Flywheel x 2 Constructed by Team - - Camera Lens (2.5 cm x 2.5 cm) $10.41 $17.00 $27.41 Batteries (5 x Lithium 9V + 1 Alkaline 12V) $22.00 - $22.00 Rigid Photovoltaic Cell (5.99cm x 5.99cm) $3.00 $12.57 $15.57 Flexible Photovoltaic Cell (2.54cm x 9.91cm) $2.70 - $2.70 SPEED 250, 7.2V Motor x 4 $35.60 $14.99 $50.59 Space Blanket $3.99 - $3.99 Ball Bearings x 2 $19.80 $7.16 $26.96 Compact Flash Card 2GB $27.00 $27.00 Total $124.50 $51.72 $176.22
Outside View 1
Outside View 2
Inside View 1
Cross Section View of Ball Bearing System
Switch 1 Heater
9V Battery
9V Battery
9V Battery
Rigid Photovoltaic
4 Port HOBO Data LoggerFlexible Photovoltaic
External Temperature
Internal Temperature
Motor 1Switch 29V Battery
Motor 2Switch 39V Battery
12V Battery Switch 4 CCD Video Camera
Digital Video Recorder
Functional Block Diagram
Component Mass PC 180XP Cube Camera 31.18g Micro Digital Video Recorder 75.98g HOBO 26.60g Heater 33.80g Plastic Pipe 6.8g Foam Core & Structure 160g Metal Flywheel x 2 50g Camera Lens (2.5 cm x 2.5 cm) 10.60g Batteries (5 x Lithium 9V + 1 Alkaline 12V) 123.90g Rigid Photovoltaic Cell (5.99cm x 5.99cm) 29g Flexible Photovoltaic Cell (2.54cm x 9.91cm) 6g SPEED 250, 7.2V Motor x 4 88g Space Blanket 7.4g Ball Bearings x 2 18.20g Compact Flash Card 2GB 25.0g Total 692.46g
GONS BalloonSat Schedule - October Sunday Monday Tuesday Wednesday Thursday Friday Saturday
7 Team
Meeting 8:30PM Brackett
7 Team
Meeting 7:00PM Brackett
2 In Class Q &
A With Professor
7 Team Meeting
3:30PM Brackett
4 Design
Document Rev. A
DUE 8:00AM
5 6
7 Team
Meeting 8:30PM Brackett
8 9 Team
Meeting 4:30PM Brackett Finalize
Materials Needed For
Order
10 11 Team Meeting
7:00PM Brackett
Hardware Orders In Class
12 13
14 Team
Meeting 8:30PM Brackett
15 16 Meeting 4:00PM Brackett
17 DDB due 8:00 AM
18 CDR
DUE 8:00 AM
19 Meeting 3:00PM Brackett
20
21 Team
Meeting 8:30PM Brackett Finish
Prototype
22 Testing:
Drop Test Whip Test
23 In Class
Team Time Q & A With
Professor Meeting 4:00PM Brackett
24 Testing:
Functional Tests Subsystem Tests
Imaging Tests
25 Testing:
Cooler Test
26 Testing:
Mission Sim Test
Meeting 3:00PM Brackett
27
28 Team
Meeting 8:30PM Brackett
29 30 Team
Meeting 4:00PM Brackett
31 1 2 Meeting 3:00PM Brackett
3
GONS BalloonSat Schedule – November / December Sunday Monday Tuesday Wednesday Thursday Friday Saturday
1
2 3
4 Team
Meeting 8:30PM Brackett
5 6 In Class Team
Time Bring All Hardware Meeting 4:00PM Brackett
7 Team Meeting
3:30PM Brackett
8 Pre-Launch
Inspection & Launch
Readiness Review
Bring All Hardware DDC DUE
9 Final
Weigh-In & Turn-In
By 2:00 PM Meeting 3:00PM Brackett
10 Launch
Day 7:30 AM Windsor, Colorado
11 Team
Meeting 8:30PM Brackett
12 13 Launch Recap
& Report & Data Analysis
Guidance Bring Fight
Data!
14 15 16 17
18 Team
Meeting 8:30PM Brackett
19 20 21 22 23 24
25 Team
Meeting 8:30PM Brackett
26 27 28 29 30 1
2 Team
Meeting 8:30PM Brackett
3 4 Final Team
Presentations & Reports
DUE 8:00 AM
Test Plan
Test Description Optics Test Test imaging system and its components
Take CCD camera and system outside to take pictures of night sky Drop Test Drop prototype from a height of 8 meters to recreate landing situation Whip Test Secure prototype to string and have team member swing above head
Creates g-forces similar to what will be encountered during flight Cooler Test Insert actual spacecraft into cooler containing solid carbon dioxide
Ensure spacecraft can maintain internal temperature above 0° C Functional Test Isolate every subsystem for testing
HOBO – test various components attached to HOBO - for temperature wil l expose to cold and warm air - will expose photovoltaic cells to varying light intensities - check to make sure recorded data corresponds to test
Motors – hang spacecraft on string to ensure lined up correctly - make sure flywheel attached correctly
Mission Sims Test Recreate mission environment by running subsystems concurrently
Expected Results of ScienceExpected Results of Science•Stabilized satellite about the vertical axis
•Record CCD imaging of the horizon and sky
• Rigid photovoltaic cell will output more power
•Flexible photovoltaic cell will be more suited for our purposes
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