echo critical design review andrew berg, shawn carroll, cody humbargar, jade nelson, jared russell,...

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