1. Team SST Critical Design Review
Vlad Soukhovei, John Marcantonio, Kara Dongiovanni, Daniel Flora, Eric James, Sean Rivera
10/4/10

2. Mission Overview
Ascend to 30 km, collecting data regarding temperature, air density, sound
Compare air density to sound to confirm expected relationship
Compare amounts of Carbon dioxide with sound data
Hypothesis: air density goes down=frequency increases, amplitude decreases
Large amounts of carbon dioxide result in new recorded frequencies
Why? Use sound as means of detecting gas

3. Requirements Flow Down
Level Zero Requirements
1. Construct a BalloonSat which will withstand an ascent and descend of 30km while collecting photographs of the entire flight
2. Collect sound data from the entire flight
3. Collect air composition data on carbon dioxide from other BalloonSat groups
4. Maintain a mass of fewer than 850g for BalloonSat
5. Maintain a temperature of no less than -10⁰C
6. Keep total cost under $300

4. Level One Requirements
1. a. Use foam core to make a structurally sound flight platform which shall survive the impact of a descent from 30km
1. b. Use a launch platform capable of attaining 30km (Helium balloon)
1. c. Integrate the given camera system to attain required photographs
1. d. Collect photographs on incorporated memory card on the camera
1. e. Use testing to make sure the BalloonSat structure is sound enough to withstand takeoff and landing
2. a. Program an AVR pocket microcontroller to produce an A major scale through a .5W 80Ω speaker
2. b. Collect sound data in the form of frequency and amplitude, over the entire flight, using a Sony Digital Voice REC1GB FL through the built in microphone and memory
2. c. Attain data from recorder and plot on a graph versus time during flight
3. a. Obtain data from other groups after flight on carbon dioxide composition over time of flight
3. b. Plot composition of air data versus the fluctuation in frequency and amplitude
4. a. Accurately mass and record all systems contained within the BalloonSat
4. b. Take remaining mass in budget and convert that to foam core and insulation
5. a. Assemble provided heater kit to use in the BalloonSat
5. b. Construct BalloonSat to insulate the heat produced by our heating system
6. a. Research all the parts and add up all costs before ordering to assure it doesn’t exceed $300
6. b. leave $100 barrier for replacement parts in case objects break

6. AVR Pocket Microcontroller
HOBO
Temperature Probe
Power Supply
AVR Pocket Microcontroller
Speaker

7. Meeting Date/ Important date Deadlines/Tasks/Goals for Meetings
10/4
Complete DD Rev A document and CDR slides, practice CDR 8 minute presentation
10/6
Acquire all hardware
Build first prototype structure out of foam core, aluminum tape- fit systems into structure to design insulation system
Prototype designs for subsystems (speaker/recorder, thermal, power)
10/8
-Perform structural tests ( Kick structure down stairs, drop structure off of ITLL balcony)
-Speaker/microcontroller programming ( Program to make speaker play harmonic scale)
10/13
-Functional testing of speaker (playing continuous harmonic scale) Verify data collection by the audio controller
- Install HOBO to collect temperature
-Perform Cold test ( including science system to insure functional at cold temp)
10/15
-Finalize Design based on results from functional test, cold test, and structural test
-Imaging test
-Begin DD Rev C
10/20
-Build/construct final BalloonSat structure, systems installation
-Finish DD Rev C
10/22
-Install all subsystems (speaker, audio recorder device, microcontroller, batteries, camera)
10/26
-Bring BalloonSat to class with all hardware for Pre-launch inspection.

8. 10/27
-Finalize installation of subsystems
-Produce a launch-ready BalloonSat
-Begin Launch Readiness Review slides
10/28
30 min Mission Simulation Test in class
10/29
Finish Launch Readiness Review slides, practice LLR presentation
11/02
Launch Readiness Review Presentation
11/3-11/5
-Trouble-shoot/modify all things necessary with DJDoppler
11/6
LAUNCH!
11/10
Input data from BalloonSat DJDoppler into MATLAB program
11/12
-Create graphs comparing air density to frequency, air density to amplitude, carbon dioxide gas composition to amplitude and frequency
11/17,11/19
-Complete project final report (DD Rev D)
-Complete project final presentation
-rehearse final presentation
11/29
-Regroup with team, review final report
12/02
-Present Final results

9. Digital Audio Recorder $55.00 (after shipping) 44.5 grams w/ batteries
Component
Cost
Weight
Contact Information
Purchased From
Part Number
Foam Core
Provided
175g
N/A
HOBO Data Logger
25.0 grams
Batteries
$25
150.0 grams
2800 Pearl St Boulder, CO
Target
Heater
29.9 grams
Switches
20.0 grams
Digital Audio Recorder
$55.00 (after shipping)
44.5 grams w/ batteries
7249 Whipple Ave NW, North Canton, OH 44720,
Provantage.com
ICDPX820
Portable Weather Station
$ (after shipping)
34.5 grams w/batteries
The Price Pros
AVR Pocket Microcontroller
$14.95 (after shipping)
5 grams
6175 Longbow Drive
Suite 200
Boulder, CO 80301 ,
SparkFun
PGM-09825
Speaker
$6.53 (after shipping)
42.2 grams
COM-09151
Canon Digital Camera
220.0 grams w/ batteries
Brunton ADC-IR
$34.95 (after shipping)
455 S Washington Street in Nashville, IL
B&B Global Sales LLC
F-ADC-IR
Total
$ *
746.1 grams **

10. Test Plan
The design and its components will be put through rigorous testing in order to insure its functionality throughout the entire flight. Throughout the testing phase each subsystem will be tested individually. Then to conclude testing, the subsystems will be given a simulated launch test with all components together.
Testing for the design hasn’t started, yet, when testing starts all subsystems will be tested consecutively. The payload will be tested on many different trials to ensure functionality of design.
“whip test”, “beer cooler test”, “drop test”, “stair test”, “imaging test”, “sound test”, and concluding with “the mission simulation test.”

11. Testing Schedule Test System Tested Date
Digital Sound Recorder Functionality Test
Science/payload
October 6
Drop Test
structure
October 8
Kick Test
Functional test of Speaker (play repeating harmonic scale)
October 13
Cold Test (thermal test)
Thermal/power
Image Testing (camera)
payload
October 15
Whip Test
Full payload test (speaker + recorder)
Payload/power
October 20
Mission Simulation Test
Payload/power/
structure/thermal
October 28

12. Expected Results
Air density changes relating to changes in frequency and amplitude of the sound wave
Fluctuations in the sound wave correlating to increasing and decreasing amounts of carbon dioxide
Presence of the resonating frequency of carbon dioxide

13. Organizational chart Team Member Titles Specific Tasks Sean
Head Engineer/Project Leader
Programming Engineer
-Makes executive team decisions
-systems programming
Eric
Testing Engineer
Assistant Programming Engineer
-Subsystem testing
-software modification
-Programming
Kara
Hardware Engineer
Assistant Management Engineer
-Order/acquire all Hardware
-Budget management
-Team Coordination
John
Management Engineer
Assistant Manufacturing Engineer
-Time management
-Team Coordination (meetings, s)
-Subsystem installation
Dan
Manufacturing Engineer
Assistant Testing Engineer
-Build satellite structures
Vlad
Design Engineer
Assistant Project Leader
-Satellite design
-Satellite design modifications
-Assist project leader in important decisions

14. Biggest Worries Lack of data correlation
Won’t find the resonant frequency of CO2
The devices freeze