Temple University Advisors: Dr. John Helferty Charles Wright Jinyan Chen Billy Cheng Brittany Gray...
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ROCK IT ROCKE
FULL MISSION SIMULATION TEST REPORT
Temple UniversityAdvisors: Dr. John Helferty
Charles WrightJinyan Chen
Billy ChengBrittany GrayMay 12, 2010
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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
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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
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Pictures
Schematic Including The BS2 Microcontroller
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Pictures Up-Close Of BS2, ADC0831, Z-Accelerometers, And
RS232 Interface
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Pictures
Z-Axis Accelerometer Board
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Pictures
Prototype
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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
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Test Results
Debug Pictures Of Data Out From Z-Axis Accelerometers
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Test Results Using Vref(5V)/256 * Acc.Data = Outcoming Volts
Calibration of Z-Axis Accelerometers
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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
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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
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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
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Thank you
Questions?
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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
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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