Hang Seven Critical Design Review - spacegrant.colorado.edu

Hang Seven Critical Design Review - spacegrant.colorado.edu

Hang Seven Critical Design Review Sierra Williams, Lucas Migliorini, Abby Caballero, Chase Goodman, Paul Smith, Becca Lidvall, Ethan Hollenbach, Nikhil Desai October 18th, 2012 Mission Overview Objective Measuring Gamma Radiation as Altitude Increases Testing the effectiveness of aluminum and carbon fiber on reducing radiation levels Why do this? Determine the trend in gamma radiation on earth, as the altitude increases Test the effectiveness of materials

currently used in aircrafts Discover the altitude where the radiation can be detrimental to human health Hypothesis We predict the gamma radiation will raise linearly as the altitude increases The aluminum and carbon fiber will both reduce radiation levels to a non-lethal amount The aluminum will block more radiation than the carbon fiber Team Members Name Lead Assistant

Paul Smith Structural Design Material Acquisition, Power Chase Goodman Thermal, Power Structural Design Ethan Hollenbach Material Acquisition, Budget Ground Ops Rebecca Lidvall Manufacturing, C&DH Budget, Science

Nikhil Desai Software, Camera Thermal, C&DH Lucas Migliorini Science, Ground Ops Manufacturing Abbigail Caballero System Engineering Software, Camera Sierra Williams Project Manager System Engineering Requirements

Level Number Requirements 0 1 Payload must ascend to an altitude of 30 kilometers via balloon 0 2 Payload must store and collect data from our sensors 0 3 The payload's mass must not exceed 1.025kg 0 4

The internal temperature of the payload must not drop below -10 celsius 0 5 The payload must be able to hold all electronics and sensors 0 6 The payload must contain a heater 0 7 The payload must contain a power source 0 8 The payload must be constructed solely of foam core

0 9 The payload must be ready for launch by 1 December 2012 0 10 The payload must contain three working geiger counters 0 11 The team and project must obey all safety precautions Level 1 1 Requirements Cont. 1

1 1 1 1 1 1 1 Number Requirements 1 The geiger counters must be able to accurately measure gamma radiation 2 The payload will store and record data from the Geiger counters to an SD card The payload must survive the ascent and descent and all the forces associated with 3 both 4 The payload will contain aluminum and carbon fiber testing tubes 5 Connect the geiger counter to the Arduino microcontroller 6 Program the Arduino microcontroller to collect information 7 Use aluminum to shield one Geiger counter form radiation 8

Use carbon fiber to shield one Geiger counter form radiation 9 Use one Geiger counter as a control for radiation measurement 10 Calibrate home-made Geiger counters to an industry standard Geiger counter Level 2 Number Requirements 1 Take the measurements from the Geiger counters and plot them looking for trends Design Structure Foam core Hexagonal Arduino

Equipment Centripetal force Arduino Uno To tell the machinery in the Balloon Sat what to do Collection of Data Control of Geiger counter and Camera Storage of Data Sensors for humidity, condensation, and temperature Camera Canon SD780 to capture the majestic earth in pictures and videos Design Structure

(cont.) Arduino Functional Diagram Heater 2 AA Batteries 1 GB SD Card Switch 2 Camera Switch 3 3x9V Batteries Switch 1 Geiger Counter Arduino Board Lithium-ion Battery Geiger Counter Geiger Counter Switch 4

2 AA Batteries 2 AA Batteries Switch 5 Biggest Worries Hardwar e -Sensors failure -Electrical failure -Overheating -Faulty programming -Geiger counters not working Structural -The Gs after the balloon pop -Integrity of the structure -Condensation inside the -BalloonSat

-Temperature Test Plan Predicted Results The Geiger counter that is not protected will read substantially higher radiation than the protected Geiger counters The Geiger counter that is not protected will reach a lethal level The Geiger counter with an aluminum cover will read less gamma radiation than the Geiger counter with carbon fiber cover

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