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

Personnel and Division of Labor

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

Testing Plan

1. HOBO Testing

2. Sound Equipment Testing

3. Structural Testing (Shock, Drag, and Whip)

4. Optics Testing

5. Integration Testing