Download - Digital Control Electronics For Optical Gyroscopes · Digital Control Electronics For Optical Gyroscopes Marco Cerrato, Physics B.S. Daniel Blumenthal, Ph.D. Sarat Gundavarapu, Graduate

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Page 1: Digital Control Electronics For Optical Gyroscopes · Digital Control Electronics For Optical Gyroscopes Marco Cerrato, Physics B.S. Daniel Blumenthal, Ph.D. Sarat Gundavarapu, Graduate

Digital Control Electronics For Optical Gyroscopes

MarcoCerrato,PhysicsB.S.

DanielBlumenthal,Ph.D.

SaratGundavarapu,GraduateMentor

Dept.ofElectrical&ComputerEngineering

July28th,2016

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Page 2: Digital Control Electronics For Optical Gyroscopes · Digital Control Electronics For Optical Gyroscopes Marco Cerrato, Physics B.S. Daniel Blumenthal, Ph.D. Sarat Gundavarapu, Graduate

What Is An Optical Gyroscope?

! HighlySensiGveRotaGonalSensors

! EmployedinAircraJNavigaGon

! PotenGalUseinOtherIndustries

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Ω

Page 3: Digital Control Electronics For Optical Gyroscopes · Digital Control Electronics For Optical Gyroscopes Marco Cerrato, Physics B.S. Daniel Blumenthal, Ph.D. Sarat Gundavarapu, Graduate

Fiber Optic Gyroscope

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!  ScaleFactor!  ProperFrequency! AllanDeviaGon

Page 4: Digital Control Electronics For Optical Gyroscopes · Digital Control Electronics For Optical Gyroscopes Marco Cerrato, Physics B.S. Daniel Blumenthal, Ph.D. Sarat Gundavarapu, Graduate

Project Milestones

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Goal:MiniaturizeBulkyOpGcGyrosintoOn-ChipVersions.

! SizeReducGon

! LowPowerDraw

! VeryPreciseMeasurements

! DigitalControlElectronics

Page 5: Digital Control Electronics For Optical Gyroscopes · Digital Control Electronics For Optical Gyroscopes Marco Cerrato, Physics B.S. Daniel Blumenthal, Ph.D. Sarat Gundavarapu, Graduate

Digital Control Electronics

! UsedAsFuncGonGenerator! AppliesFrequencyToPhaseModulator! IfApplyingCorrectFrequency,SensiGvityOfGyroIsMaximized

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!  FieldProgrammableGateArray(FPGA)!  CanBeUsedForManyPurposes

Page 6: Digital Control Electronics For Optical Gyroscopes · Digital Control Electronics For Optical Gyroscopes Marco Cerrato, Physics B.S. Daniel Blumenthal, Ph.D. Sarat Gundavarapu, Graduate

FPGA Tools And Software

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! VeryHighSpeedIntegratedCircuitHardwareDescripGveLanguage(VHDL)!  HardwareDescripGveProgrammingLanguageExclusivetoFPGAs

!  XilinxISEDesignSuite14.7!  NaGveFPGAProgramming&AssignmentSoJware

! ISIMVHDLSimulaGonSoJware! ModelsVHDLBehavior

Page 7: Digital Control Electronics For Optical Gyroscopes · Digital Control Electronics For Optical Gyroscopes Marco Cerrato, Physics B.S. Daniel Blumenthal, Ph.D. Sarat Gundavarapu, Graduate

FPGA Signal Traces ! ProgrammedFPGAsToSynthesizeDifferentFrequencies! AlsoChangedDutyCycleOfSignal

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Ex:Generate5MHz,SimulaGonToOscilloscopeTrace

Ex:VariableDutyCycle,75%to25%

Page 8: Digital Control Electronics For Optical Gyroscopes · Digital Control Electronics For Optical Gyroscopes Marco Cerrato, Physics B.S. Daniel Blumenthal, Ph.D. Sarat Gundavarapu, Graduate

Traces To IP Core Comparisons ! IPCores:CodeInVHDLLibraries(Pre-Coded)

! CheckedOscilloscopeTracesFromCustomCodetoIPCores

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VHDLCustom

IPCore

10MHZ

25MHz

Page 9: Digital Control Electronics For Optical Gyroscopes · Digital Control Electronics For Optical Gyroscopes Marco Cerrato, Physics B.S. Daniel Blumenthal, Ph.D. Sarat Gundavarapu, Graduate

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

Page 10: Digital Control Electronics For Optical Gyroscopes · Digital Control Electronics For Optical Gyroscopes Marco Cerrato, Physics B.S. Daniel Blumenthal, Ph.D. Sarat Gundavarapu, Graduate

Current Roadblock(s)

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! CurrentSignalFrequencyCanbeChangedStaGcally!  AJerRe-ProgrammingOrRestarGng

Oscilloscope

! Problem:Can’tMakeSignalChangeDynamically! NoOscilloscopeRestartOrRe-

Programming

Page 11: Digital Control Electronics For Optical Gyroscopes · Digital Control Electronics For Optical Gyroscopes Marco Cerrato, Physics B.S. Daniel Blumenthal, Ph.D. Sarat Gundavarapu, Graduate

Future Research & Testing • ControlElectronics:

•  MoreTesGngOfFPGAs•  IntegrateFPGASignalsWithGyroscope

•  ErrorAnalysis:•  AnalysisTechniquesSuchAsAllanDeviaGon(FrequencyStability)•  ApplyToDiscoverNoiseErrorTypesAndPossibleSoluGons

• General:•  AjemptClosedLoopCircuitofOpGcalGyroscope•  CustomBeginning-To-EndGyroscopeTesGngProcess

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Page 12: Digital Control Electronics For Optical Gyroscopes · Digital Control Electronics For Optical Gyroscopes Marco Cerrato, Physics B.S. Daniel Blumenthal, Ph.D. Sarat Gundavarapu, Graduate

Acknowledgements •  IExtendMyGraGtudeToTheFollowing:

•  AIMPhotonicsInternshipGroup•  DanielBlumenthal•  SaratGundavarapu•  McNairScholarsProgram•  OpGcalCommunicaGonsandPhotonicsNetworksGroup

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Page 13: Digital Control Electronics For Optical Gyroscopes · Digital Control Electronics For Optical Gyroscopes Marco Cerrato, Physics B.S. Daniel Blumenthal, Ph.D. Sarat Gundavarapu, Graduate

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