Post on 22-Dec-2015
Echo Critical Design Review
Andrew Berg, Shawn Carroll, Cody Humbargar, Jade Nelson, Jared Russell, Austin Williamson
10-17-06
Mission Overview
Main Science Mission-
• Test the effect of air pressure on sound waves.
• Using the sounding device for a comparison to secondary science mission as a flight recorder.
Secondary Science Mission-
• HOBO data logger used to measure internal and external temperature during flight
• HOBO also used to test humidity levels inside balloon-satellite.
• Temperature readings from HOBO data logger will act as a black box during mission.
Non-Science Mission-
• Using main imaging hardware to take photographs during flight.
• Secondary imaging hardware will using ultraviolet / infrared filters to take photographs.
• Photographs from main and secondary imaging hardware will be used for comparison.
Objective: Using Echo ’s science systems to show a direct correlation between the amplitude of a sound wave to the pressure of the air it passes through.
Design
• Balloon satellite measuring 10 by 12cm.
• Optics will require cameras to be mounted facing in the same direction.
• Main science system will be isolated via a tube suspended by tension springs to prevent vibration and shock.
• Secondary science system and other systems will be tightly arranged to minimize contact with vacuum at 100,000ft, optimal use of heating system, and to minimize wiring needed.
• Atmospheric control system consists of a tube system that moderates airflow and removes humidity by venting atmosphere into space.
DesignHeater Power
Switch
Heater 1
(To Heater 3)
(To Heater 2)
Timer Power
Timer
Switch
Camera 1 Camera 2Camera 1
PowerCamera 2
Power
Microphone power
Microphone/Preamp
Rectifier/filter
Switch
Op-Amp
HOBO
External Temperature
Internal Temperature
Relative Humidity
HOBO Power
Sounding Device
Sounding Device Power
Switch
DesignHardware-
Name Description Part Number Supplier
Cockroach Banisher
A simple oscillator with piezo driver FK929 Qkits
Condenser Microphone
Condenser Microphone with Preamp FK648 Qkits
Amplifier Audio Signal amplifier Qkits
Rectifier Converts Audio Signal to DC Voltage N/A ITLL
Switches For controlling power-on of all systems N/A ITLL
Various Electronic Hook up wire, capacitors, diodes N/A ITLL Aluminum Tape Sealant N/A CoSGC Sounding Structure Small Tube Structure N/A McGuckins Foam Core Lightweight Structural Material N/A CoSGC Insulation Closed-Cell Foam N/A CoSGC
Space blanket Additional Insulation, ESD Shielding N/A Target
Polyethylene Tubing 4.5mm ID for Flight Tube N/A McGuckins Compression Fittings 1/4" for Flight Tube N/A McGuckins
Washers Prevents Flight tube Tear Through N/A McGuckins
Batteries 9v Lithium TBD Heater Components Power Resistors, and cabling N/A CoSGC Timing Circuit Initiates Exposure of cameras N/A CoSGC Camera 1 APS Camera N/A CoSGC Camera 2 35 mm Camera, Pentax PC-550 Shawn Carroll
IR Filter (pass) Photography Filter, passes IR spectrum Western Camera
HOBO Data Logger CoSGC Film 35mm(IR) and APS Western Camera Dessicant Condensation Control N/A Circuit City
Design
•Two Cameras 55x87x35 mm
•Timing Circuit 40x58x22 mm
•Sounding Equipment 50x30x15 mm
•Heater 38x44x22mm
•Box 10x10x12cm
Management
• Project Schedule
• Personnel and Division of Labor
System/Project Task Team
Member Projected
Completion Due Science Decide on Experiment All 9/19/2006 Complete Power System Overview 9/19/2006 Complete
Structure 3d Models (Preliminary) Berg 9/19/2006 Complete Optics Filter Choice/System Overview Jade 9/19/2006 Complete Main CoDR Austin 9/20/2006 Complete Main Proposal Cody 9/20/2006 Complete
ATP/Feedback CoSGC 9/28/2006 Complete
Main Complete System Designs Rev A All 9/29/2006 Complete
Main Finalize BOM All 9/29/2006 Complete Main Finalize Mass and $$ Budget Cody 9/29/2006 Complete
Science Complete System Designs Rev A
Shawn + Jared 9/29/2006 Complete
C&DH Complete System Designs Rev A Cody? 9/29/2006 Complete
Power Obtain Power Requirements Jared 9/29/2006 Complete
Structure 3d Models (Add mass + density) Berg 9/29/2006 Complete
Power Complete System Designs Rev A Jared 9/30/2006 Complete
Structure Complete System Designs Rev A
Berg and Austin 9/30/2006 Complete
Optics Complete System Designs Rev A Jade 9/30/2006 Complete
Structure Fabricate Test Structure Austin 10/6/2006 Complete Main Design Document Rev A All 10/8/2006 Complete
Main CDR + Design Document Rev B All 10/15/2006 Complete
Main Test: Bench (Individual Systems) By System 10/19/2006
Testing HOBO Jared 10/19/2006 Testing Science, with Data logging Berg 10/19/2006
Testing Structural (Drag, Whip, Shock…) Austin 10/19/2006
Testing Optics with Timing and IR Jade 10/19/2006
Science Complete Individual Systems Shawn + Jared 10/19/2006
C&DH Complete Individual Systems All? 10/19/2006 Power Complete Individual Systems Jared et al 10/19/2006 Optics Complete Individual Systems Jade/Cody 10/19/2006
Structure Fabricate Test Structure (Revised) Austin 10/20/2006
Main Integrate Systems All 10/20/2006
Main Test: Bench (All together now!) All 10/21/2006
Main Integration into Structure Berg and Austin 10/21/2006
Testing Drop All 10/22/2006 Testing Whip All 10/22/2006 Main Test: Op-Shock All 10/23/2006
Testing Cold All 10/24/2006
Structure Fabricate Final Structure Austin 10/25/2006 Testing Mission Testing All 10/27/2006 Main Test: Op-Cold All 10/29/2006 Main Design Document Rev C All 11/7/2006 11/9/2006 Main LRR All 11/7/2006 11/9/2006 Main Turn In All 11/7/2006 11/10/2006
Hardware Aquire all hardware All ASAP- 9/30/2006
Budget
Team Echo III Mass Item Weight Left
Starting 800 g 800g Pre-amp 7.5g 792.5g
Satellite 10x10x12 42g 750.5g
Camera with battery and film 140.3g 610.2g Timing circuit with battery and switch 68g 542.2g
Heater 29.2g 513g
9 volt battery 46g x3 375g
Flag 1.6g 373.4g
HOBO 34.7g 338.7g
Microphone approx. 20g 318.7g
Flight Tube 7g 311.7g
Rat/Roach approx 20g 291.7g
Second camera approx 150g 141.7g
Insulation approx 10g 131.7g
Sound Tube 5g 126.7g
Team Echo III Budget
Item Bought Price Left
Starting $275.00 Rat/Cockroach Banisher Kit and $48.60 $226.40 Condenser microphone kit with pre-amp
Batteries estimated $40 $186.40
IR Film and processing approx. $30 $156.40
PVC and tubes max $10 $146.40
Springs (2) $5 $141.40
IR Camera and filter $75 $66.40
Tube and Washer system $5 $61.40
Advantix Film x2 $15 $46.40
Miscellaneous $46.40 $0.00