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Oct 25, 2023 164 likes •383 views

Team Phoenix Payload Evolution and Engineering: A Reevaluation of the Strength, Efficiency, and Design of High-Altitude Balloon Payloads by Robert Clayton, Alondra Hauser, Ryan Klimek, Nathan Leusink Pikes Peak Community College Mission

SLIDE 1

Team Phoenix

Payload Evolution and Engineering: A Reevaluation of the Strength, Efficiency, and Design of High-Altitude Balloon Payloads

by Robert Clayton, Alondra Hauser, Ryan Klimek, Nathan Leusink

Pikes Peak Community College

SLIDE 2

Mission Overview

Mission Objectives
Create a highly-efficient balloon payload that maximizes strength and volume

and minimizes weight

Use an efficient and lightweight circuit package capable of running a variety
f atmospheric sensors

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SLIDE 3

Payload: Before and After

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Previous Design Box New Design Sphere

SLIDE 4

Balloon payloads have to survive

the harsh conditions of near space

The spherical shape maximizes

strength and volume while minimizing weight

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Exterior Design Structure

SLIDE 5

Testing Shapes

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Tested a sphere, cube, tetrahedron, pyramid, and dome

SLIDE 6

Crush Test

Shapes were crushed using a

hydraulic press

The force at which each shape

shattered was recorded

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SLIDE 7

Crush Test Results

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3D Geometric Shape Volume (cm³) Weight (kg) Crushing Force (N) Square Pyramid 53.57 17.65 1457.91 253.86 Sphere 90.00 15.70 1423.43 519.73 Cube 171.51 30.85 1556.88 281.48 Tetrahedron 30.18 8.72 622.75 248.31 Dome 45.00 12.26 1467.91 439.47 ! " #$ %&'

SLIDE 8

Circuit Redesign – Overview

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Circuit Redesign – Overview

SLIDE 9

Teensy Brand Circuit Board

Redboard Features

16 MHz Processor
32 K Flash Memory
6 Analog Inputs
8 Bit Power mode/10 Bit ADC
Board Weight: 18 g
External OpenLog SD port

required Teensy 3.5 Features

120 MHz Processor
512 K Flash Memory
25 Analog Inputs
32 Bit Processor
Board Weight: 5 g
Native 4 Bit SD port

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SLIDE 10

Circuit Design and Testing

Redesign Process: 1. Program/wire on Redboard 2. Transfer sensor package to Teensy 3.5 3. Calibrate sensors 4. Program SD card port 5. Test sensors and circuit: freeze, impact, whip, and flatSAT tests

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SLIDE 11

Circuit Problems Solved

Problem:

1. Sensor readings too large
2. Fluctuating sensor readings
3. Inoperable SD card port

Solution:

1. Adjust code for 3.3V input

pins

2. Run heater on separate circuit,

use Teensy 3.5

3. Use SD.h and SD_t3.h libraries

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SLIDE 12

Expected Data vs. Flight Data

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SLIDE 13

Applications

Strength

Severe weather exploration
Future DemoSat teams

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SLIDE 14

Applications

Low Weight

Future DemoSat Teams
Exploration of ultra-light

weight materials

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SLIDE 15

Applications – Low Cost

Low Cost

Can be used in any industry
Future DemoSat Teams
Radiosondes (NOAA)

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SLIDE 16

Applications of Design

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$325 per launch X 92 locations X 2 launches daily X 365 days a year

= $21,827,000

Radiosonde

SLIDE 17

Comparing Costs

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Radiosonde

$22,000,000 $10,000,000

New Design

SLIDE 18

Lessons Learned

It is critical to:

Understand the characteristics of the circuitry
Understand the material of our structure and provide adequate thermal

insulation

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SLIDE 19

Goals Achieved

Optimized the payload while maximizing capabilities
Collected sample atmospheric data
Teensy 3.5 has the potential to be a more powerful and efficient circuit

for atmospheric data gathering

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SLIDE 20

Thank You!

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