Full Mission Simulation Report

NNU UniversityDr. Lawrence, Dr. Parke, Chad Larson, Ben Gordon,

Seth Leija, David Vinson, Drew Johnson, Zach Thomas

April 22nd 2012

RockSat-C 2012SITR

The experiment is designed to test the feasibility of using Superhydrophobic materials in the presence of high acceleration and vibration for possible use on space missions.

The other half of the experiment is to test radiation hardened chips in the presence of high radiation in a true space flight.

2

Mission Overview

RockSat-C 2012SITR

The structure has not been machined but will be done this week

The integration procedure is simply mounting the Arduino and SH boxes to the lower plate and wiring power down from the top plate

A partial parts list has been written upAction Items Finish making boxes – April 23 to 25th Test for leakage – April 28th

3

Mechanical/Structure

RockSat-C 2012SITR

Team Pairing We are interfacing with 4 supports with our

payload on the bottom half.

Working on communicating complete project specifications

4

Mechanical/Structure

RockSat-C 2012SITR

Design View

Superhydrophobic “Boxes”

Flexible & Radiation Hardened Chips

Geiger Counter Board

Arduino Board

AVR Board

RockSat-C 2012SITR

Not all of the electronics have been integrated

The activation system works perfectly The data has been sampled but not yet

written to an SD card The data does make sense Action Items

◦ The data needs to be written to the SD card◦ The last chip needs to be wire-bonded April 22nd to

25th

6

Electrical/CDH

RockSat-C 2012SITR 7

Testing Chips

Ring Oscillator Voltage testing

RockSat-C 2012SITR

Doing a 15 min test without the chips runningThe batteries’ voltage initially

9.31V, 9.32VThe batteries’ voltage after

8.57V, 8.58V The circuit is loading the Arduino microcontroller for

power resulting in not enough power for writing correct data

Action items◦ Retest with both chips attached and reading data◦ Fix voltage loading◦ Permanent jumper wires to main power

8

Power (EPS)

RockSat-C 2012SITR

The preliminary software cannot be tested due to the header pins not yet connected.

Expected sampling rate is 1kHz currently 60Hz has been achieved

This is due to delay times in the test code Action items

◦ Determine pattern for and how to stream 1’s and 0’s to hexidecimal

◦ Write output code

9

Software

RockSat-C 2012SITR

Mechanical◦ A machinist will finish making boxes◦ Test for leakage

Electrical◦ The data needs to be written to the SD card◦ The last chip needs to be wire-bonded

Power◦ Retest with both chips attached and reading data◦ Fix voltage loading◦ Permanent jumper wires to main power

Software◦ Determine pattern for and how to stream 1’s and 0’s to hexidecimal◦ Write output code

10

Action Item Summary

RockSat-C 2012SITR

WeightObject Weight (lbs)RockOn! Board 1.14Sockets and Arduino 0.36Two Aluminum Cubes w/ Water (7ml per box)

1.36

Bottom Plate 0.5

Total 3.36Plus Ballasts 6.5

11

RockSat-C 2012SITR

The project is behind schedule but can be completed with the main electrical student working May 7th to 11th once school is done

The mechanical portion should be completed May 3rd to 6th

The main problem is voltage loading. Once that is fixed the electrical side should be able to continue good progress

12

Conclusions