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