ROCK IT ROCKE

FULL MISSION SIMULATION TEST REPORT

Temple UniversityAdvisors: Dr. John Helferty

Charles WrightJinyan Chen

Billy ChengBrittany GrayMay 12, 2010

1

Mission Overview Design, Build, And Test A

Vibration Suppression System To Counteract Launch Vehicle Vibrations

Measure The Vibration Environment Inside The Terrier-Orion RocketWill Use Two Identical Vibration

Measurement Systems○ A Custom Built Passive Damping

System○ Rigidly Attached System

2

Changes Since Subsystem Integration Changed Microcontroller To Basic

Stamp 2 (BS2)Programming Language – Basic

High And Low Z-Axis and Low X-Y MonitoredSame Flash, Level Shifter, and Power Supply

-- With G-Switch And RBF External Analog To Digital Converters

ADC 0831 Used For Each Accelerometer

3

Pictures

Schematic Including The BS2 Microcontroller

4

Pictures Up-Close Of BS2, ADC0831, Z-Accelerometers, And

RS232 Interface

5

Pictures

Z-Axis Accelerometer Board

6

Pictures

Prototype

7

Test Description - Electrical Integrating New Microcontroller With

Existing Components Read Accelerometer Data Through

ADC 0831 Erase Flash Memory Write Acc. Data To Flash Memory

We Were Able To Log The Required Data ○ Our Test Duration Was For Short Periods○ Ensured That Data Was Being Logged

8

Test Results

Debug Pictures Of Data Out From Z-Axis Accelerometers

9

Test Results Using Vref(5V)/256 * Acc.Data = Outcoming Volts

Calibration of Z-Axis Accelerometers

10

Overall Analysis

Currently Not Ready For Launch And Collectively, We Are Some Busy, Unhappy Students

We Still Must CompletePCB Printing – Order Should Be Out By

This Week○ Soldering And Mounting Of Components With

PCB Board And Plates

11

Lessons Learned

We Must Have A Backup PlanDon’t Be Scared To Resort To It

Work In Parallel With Other Group MembersOur Major Problem “Bottlenecked” All

ProgressEveryone Was Focused On Immediate

Issue Difficult To Decipher Someone’s Code

12

Conclusions

Initializing Memory (Chip Erase) Takes Too LongAttempt To Erase Memory Block By

Block (64kb Sectors) Can Log Data To Lower Order

Address (000000h-00FFFFh)Will try to log data to higher order

address More Mechanical Tests Need To Be

Done

Thank you

Questions?

14

Appendix: Code ' {$STAMP BS2}' {$PBASIC 2.5}

'---------Variables--------------------------

addhi VAR Byte 'high byte of address locationaddlomi VAR Word 'low 16 bits of address locationcmd VAR Byte ' command, to be sent by the Stampadrs VAR Byte ' which byte on pagedat VAR Byte 'data instatOne VAR Bytestat VAR Byte 'status registerresult VAR Byte ' ADC8031 ResultresultOne VAR Bytevolts VAR Word ' Volts (0.01 Increments)ix VAR Byte ' general purpose indexx VAR Byte ' general purpose byte

'--------------------------------------------'------Connection Lines----------------------

Adc0831 PIN 0 ' ADC0831 Chip SelectAdc0832 PIN 10AdcClock PIN 2 ' ADC0831 ClockAdcClockOne PIN 11AdcData PIN 1 ' ADC0831 DataAdcDataOne PIN 12cs CON 8 ' chip SELECT lineclk CON 5 ' clock lineso CON 7 ' data output line

'---------Variables--------------------------

addhi VAR Byte 'high byte of address locationaddlomi VAR Word 'low 16 bits of address locationcmd VAR Byte ' command, to be sent by the Stampadrs VAR Byte ' which byte on pagedat VAR Byte 'data instatOne VAR Bytestat VAR Byte 'status registerresult VAR Byte ' ADC8031 ResultresultOne VAR Bytevolts VAR Word ' Volts (0.01 Increments)ix VAR Byte ' general purpose indexx VAR Byte ' general purpose byte

'--------------------------------------------'------Connection Lines----------------------

Adc0831 PIN 0 ' ADC0831 Chip SelectAdc0832 PIN 10AdcClock PIN 2 ' ADC0831 ClockAdcClockOne PIN 11AdcData PIN 1 ' ADC0831 DataAdcDataOne PIN 12cs CON 8 ' chip SELECT lineclk CON 5 ' clock lineso CON 7 ' data output linesi CON 6 ' data input line '

'-------------------------------------------------'---------------Variable Initializing-------------

addhi = $00addlomi = $0000

'------------------------------------------------

'---------------------Main Program---------------

GOSUB counter

END

counter:'-----------------------------'DEBUG CR, DEC addhi'GOSUB erase'GOSUB echipGOSUB unprotectGOSUB eraseDEBUG "write sensor1 read sensor1 write sensor2 read sensor2", CRDO WHILE (addhi < $20) addlomi = addlomi +$8 IF (addlomi = $0000)THEN addhi = addhi + $1 ENDIF DEBUG HEX addhi," ", HEX addlomi, CR GOSUB prgm GOSUB rd

addlomi=addlomi+$8 IF(addlomi=$0000)THEN addhi=addhi+$1 GOSUB erase ENDIF GOSUB prgmOne GOSUB rd DEBUG CRLOOPRETURN

enable:'-----------------------'write enablecmd = $06 'opcode for write enableLOW cs 'CS lowSHIFTOUT so, clk, MSBFIRST, [cmd\8] 'sets

WEL bit to 1 in status registerHIGH cs 'CS highRETURN

disable:'----------------'disable writecmd = $04LOW csSHIFTOUT so, clk, MSBFIRST, [cmd\8]HIGH csRETURN

unprotect:'---------------------------------------'performing a global unprotect of flash

GOSUB enablecmd = $01 'opcode for global unprotectdat = $00 'sets the status at unprotectLOW csSHIFTOUT so, clk, MSBFIRST, [cmd\8, dat\8]HIGH csRETURN

rd:'----------------'read from memorycmd = $0BLOW csSHIFTOUT so, clk, MSBFIRST, [cmd\8, addhi\8, addlomi\16, 0\8]SHIFTIN si, clk, MSBPRE, [stat\8]HIGH cs

DEBUG " ", DEC stat, " "

RETURN

prgm:'------------------------------------------'___________________________________________

GOSUB accelGOSUB logGOSUB disable

RETURN

prgmOne:'------------------------------------------'___________________________________________

GOSUB accelOneGOSUB logOneGOSUB disable

RETURN

log:'----------------------------------------------'writing commands to the flashGOSUB enable

cmd = $02LOW csSHIFTOUT so, clk, MSBFIRST, [cmd\8, addhi\8, addlomi\16, result\8]HIGH csDEBUG " ", DEC result, " "RETURN

logOne:GOSUB enablecmd = $02LOW csSHIFTOUT so, clk, MSBFIRST, [cmd\8, addhi\8, addlomi\16, resultOne\8]HIGH csDEBUG DEC resultOne, " "RETURN

accel:'------------------------------------------'logging accelerometer data into memoryHIGH Adc0831result = 0LOW Adc0831SHIFTIN AdcData, AdcClock, MSBPOST, [result\9]HIGH Adc0831RETURN accelOne:'------------------------------------------'logging accelerometer data into memoryHIGH Adc0832resultOne = 0LOW Adc0832SHIFTIN AdcDataOne, AdcClockOne, MSBPOST, [resultOne\9]HIGH Adc0832RETURN