Digital Control Electronics For Optical Gyroscopes · Digital Control Electronics For Optical...
Transcript of Digital Control Electronics For Optical Gyroscopes · Digital Control Electronics For Optical...
Digital Control Electronics For Optical Gyroscopes
MarcoCerrato,PhysicsB.S.
DanielBlumenthal,Ph.D.
SaratGundavarapu,GraduateMentor
Dept.ofElectrical&ComputerEngineering
July28th,2016
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What Is An Optical Gyroscope?
! HighlySensiGveRotaGonalSensors
! EmployedinAircraJNavigaGon
! PotenGalUseinOtherIndustries
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Ω
Fiber Optic Gyroscope
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! ScaleFactor! ProperFrequency! AllanDeviaGon
Project Milestones
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Goal:MiniaturizeBulkyOpGcGyrosintoOn-ChipVersions.
! SizeReducGon
! LowPowerDraw
! VeryPreciseMeasurements
! DigitalControlElectronics
Digital Control Electronics
! UsedAsFuncGonGenerator! AppliesFrequencyToPhaseModulator! IfApplyingCorrectFrequency,SensiGvityOfGyroIsMaximized
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! FieldProgrammableGateArray(FPGA)! CanBeUsedForManyPurposes
FPGA Tools And Software
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! VeryHighSpeedIntegratedCircuitHardwareDescripGveLanguage(VHDL)! HardwareDescripGveProgrammingLanguageExclusivetoFPGAs
! XilinxISEDesignSuite14.7! NaGveFPGAProgramming&AssignmentSoJware
! ISIMVHDLSimulaGonSoJware! ModelsVHDLBehavior
FPGA Signal Traces ! ProgrammedFPGAsToSynthesizeDifferentFrequencies! AlsoChangedDutyCycleOfSignal
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Ex:Generate5MHz,SimulaGonToOscilloscopeTrace
Ex:VariableDutyCycle,75%to25%
Traces To IP Core Comparisons ! IPCores:CodeInVHDLLibraries(Pre-Coded)
! CheckedOscilloscopeTracesFromCustomCodetoIPCores
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VHDLCustom
IPCore
10MHZ
25MHz
Why Do This? ! Goal:CreateProgramToDynamicallyChangeSignalFrequency! WouldAllowUsToApproachProperFrequencyByTesGngMoreFrequencies
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! ExampleModelingOfProperFrequency! Pre-RecordedDataToShowHowtoFind
ProperFrequency
! ProperFrequencyFoundAtLowestVoltage! WantToUseFPGADynamicSignalToFind
ProperFrequency
Frequency(MHz)
Voltages(V
olts)
ProperFrequency=7.96MHZ
Current Roadblock(s)
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! CurrentSignalFrequencyCanbeChangedStaGcally! AJerRe-ProgrammingOrRestarGng
Oscilloscope
! Problem:Can’tMakeSignalChangeDynamically! NoOscilloscopeRestartOrRe-
Programming
Future Research & Testing • ControlElectronics:
• MoreTesGngOfFPGAs• IntegrateFPGASignalsWithGyroscope
• ErrorAnalysis:• AnalysisTechniquesSuchAsAllanDeviaGon(FrequencyStability)• ApplyToDiscoverNoiseErrorTypesAndPossibleSoluGons
• General:• AjemptClosedLoopCircuitofOpGcalGyroscope• CustomBeginning-To-EndGyroscopeTesGngProcess
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Acknowledgements • IExtendMyGraGtudeToTheFollowing:
• AIMPhotonicsInternshipGroup• DanielBlumenthal• SaratGundavarapu• McNairScholarsProgram• OpGcalCommunicaGonsandPhotonicsNetworksGroup
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