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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