RockHydro Individual Subsystem Testing Report

Northwest Nazarene UniversityAdvisor: Dr. Lawrence

Chad LarsonBen Gordon

Seth LeijaDavid VinsonZach ThomasDrew Johnson

Team Pictures Mission Overview Schedule Changes Since CDR Superhydrophobic Subsystem Electrical Subsystem Subsystem Integration Lessons Learned Conclusion

Table of Contents

Team Picture!

Advisors

Dr. Lawrence Dr. Parke

Mechanical

Chad Larson Ben Gordon

Mechanical

Zach Thomas

Electrical

Seth Leija Andrew Johnson

Electrical

David VinsonDale WilsonAmerican Semiconductor Inc.

Team Organization

American Semiconductors

Dale Wilson

Electrical David Vinson

Seth LeijaDrew Johnson

Superhydrophobic

Mechanical Ben GordonChad LarsonZach Thomas

AdvisorDr. Dan

Lawrence

AdvisorDr. Parke

Study the feasibility of using Superhydrophobic materials in the presence of high acceleration and vibrations for possible use on space missions.

The material will be tested under an electron microscope pre and post flight to determine the condition of the surface.

It is expected that the material will survive the flight and still be superhydrophobic.

Mission Overview

Mission Overview Test Flexfet technology

◦ Viability in high radiation environment Test FleX technology

◦ Testing of hardware in high G environment Return useful data to ASI Provide low cost space launch opportunity

to ASI

Superhydrophobic:◦ Receive plates from Oakridge: Feb 15◦ Begin building aluminum enclosure: Feb 20◦ Begin building polycarbonate enclosure: Feb 20◦ Complete building and begin testing: Feb 27◦ Study SH with electron microscope: Feb 20- Feb

27

This is slightly behind where we had planned due to our design change and we are waiting for our plates from Oakridge to arrive.

Schedule

Electrical:◦ Get socket in mail: Feb 18◦ Finish Arduino code: Feb 20◦ Testing: Feb 22◦ Integrate with g-switch: Feb 28◦ Run Full Flight Test: March 4

Schedule

Changes Since CDR The biggest change since

the CDR is the removal of the “donut” which has been replaced with two aluminum boxes. This change was done because the box allows for our experiment to be looked at under an electron microscope. The details of this change are in the slides below.

Also, the PCB is no longer needed.

Design

Old New

Superhydrophobic Subsystem Right now, the plates

that are coated with different superhydrophobic materials are being shipped from Oakridge National Laboratory and should arrive later this week.

Superhydrophobic/Mechanical Subsystem◦ Chad Larson

Electrical Subsystem◦ Seth Leija

Subsystem Overview

Superhydrophobic Subsystem

Once the plates arrive, they will be looked at under an electron microscope at Boise State University. This will allow us to see what the material looks like before and after the flight to determine if it survived the rocket launch

Superhydrophobic Subsystem

Aluminum Box

The new containers for the superhydrophobic plates are made out of a solid piece of aluminum. The superhydrophobic plate will slide into place inside the container and then the box will be sealed with an O-ring and screwed down.

Aluminum Box

O-Ring

Slits that hold the SH Plates

Screws on the outside of the O-ring

Solid Aluminum Box

Polycarbonate Box

Polycarbonate Box

On the outside of the Aluminum box, will be a box made of polycarbonate that is made using screws and sealed with a silicon based sealant.

• Hardwareo Hardware has been assembledo Preliminary tests have been successful

Successfully writes inputs and outputs to txt files (ASCII)o Currently awaiting socketo Certain errors have occurred when saving to an SD card

Files are deleted on ejection of SD card

• Softwareo Preliminary code to check for errors is working

Takes input vectors in Matlab and outputs a vector containing error positionso Currently does not open files directlyo Have not yet determined the best way to display errors

Electrical Subsystem

Electrical Subsystem

Inverter Chip Test Arduino with Shield

Data Collection Testing Hardware

◦ Arduino Mega 2560◦ Adafruit Datalogger

Shield Stored on SD memory card

Reasoning◦ Expandability◦ Ease of use◦ User Community

Resources How

◦ Outputs two text files◦ Contains input data and

output data

Data Analysis Using Matlab

◦ Ease of use◦ Graphing

How◦ Reading data from

files◦ Analyze expected vs

actual data◦ Output pertinent

information

G-Switch

Arduino

ASC Chip(Packaged)

ASC Chip(Unpackaged

)

SD Card

Clock

Microcontroller

PowerDataClock Power

Supply

Block Diagram

Code

Matlab Arduino

Subsystem Integration The two different

experiments integration should not be too complex. The two boxes will be at the bottom of the canister, and then the electronics will be on a plate directly above it.

Your first design will NOT be your final design.

Focus on trying to finalize design early on. Be flexible Splitting up the work into different “teams”

is very beneficial…..as long as there is good communication.

Be prepared to error check your code!

Lessons Learned

Superhydrophobic Plates are arriving this week!

Building Enclosure for material is main goal.

Electrical System is going smoothly. We gave a presentation to American Semiconductor, Inc. this last week!

Conclusion

Questions??