Seakeeper 8000 GYRO User manual

Rev3JULY2013
OPERATIONMANUAL
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MODEL8000GYRO
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OPERATION
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MODEL8000GYRO901413
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MODEL8000GYRO
OPERATIONMANUAL
JULY2013
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Contents:
Section1–SystemOverview
Section2–SystemOperation
Section3–PowerFailures,Alarms,andTroubleshooting
Section4–Maintenance
Section5–Warranty,LimitofLiability,PropertyRights
Section6–GyroSpecsandSummary
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44425PECANCOURT,SUITE151
CALIFORNIA,MARYLAND,20619,U.S.A
PHONE:410‐326‐1590
FAX:410‐326‐1199
E-MAIL: [e-mail]

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Section1:SYSTEMOVERVIEW
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1.0SystemOverview
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TheSeakeeperModel8000Gyrousesgyroscopicprinciplestoreduceboatrollmotionsinwavesand
wakesindependentofboatspeed.OneModel8000Gyrowillreducetherollmotionsofaboatthat
displaces15to25tons.Boatswithhigherdisplacementtypicallyrequiremultiplegyrostoprovidegood
rollreduction.Inmultiplegyroinstallations,thegyrosoperateindependentlyofeachotherand
thereforethismanualonlydiscussesoperationofasingleunit.
AModel8000GyroconsistsofaGyroassembly(includingGyroControlBoxandCompactMotorDrive
Box),serialcommunicationscable,andDisplay.Figure1illustratestheinterconnectionofthese
componentsandtheirinterfacewiththeboat.
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FIGURE1–MODEL8000GYROSTABILIZATIONSYSTEMCOMPONENTS
TechnicalspecificationsprovidedinSection6listthepowerconsumption,totalweight,anddimensions
ofthemajorcomponents.Gyroscopicprincipalsthatapplytoboatrollcontrolarediscussedon

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Seakeeper’swebsiteatwww.seakeeper.com.TheSeakeeperwebsitealsocontainsvideosofgyro
operationandvideosofseveraldifferentboatsoperatinginwaveswiththeModel7000Gyroonandoff.
Itisrecommendedthatthereaderplaythesevideospriortoreadingtheremainderofthismanual.
Thegyro’sgimbalangleandthegyro’srateofrotationaboutthegimbalaxis(termedprecessionrate)
playanimportantroleinitsoperation.TheseparametersareillustratedinFigure2.Atzerodegree
gimbalangle,thegyroisvertical;itcanprecessamaximumof+/‐60degreesaboutthisposition.The
amountoftorquethatthegyroexertsonaboat’shulltocounterthewaveinducedrollisdirectly
proportionaltotheprecessionrate.Thefurtherthegyroisfromvertical(zerodegrees)thelowerthe
anti‐rolltorque.TheverticalarrowsinFigure2illustratethedirectionoftheforcesthatthegyroexerts
ontheboat’shulltodamprollmotion.
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FIGURE2–GYROPRECESSION

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Seakeepergyroprecessionisactivelycontrolledbyanelectroniccontrollerandahydraulicbrake
throughouteachrollcyclesothegyrosuppliesthemaximumanti‐rolltorqueanddoesnotmake
mechanicalcontactwithhardstopsthatlimitthemaximumgimbalangletravelto+/‐60o.
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Thereisalargetorqueaboutthegimbalaxiswhenthegyroisprecessing.
Therefore,thegyroshouldbehousedinacompartmentorinstalledinacageso
personnelcannotcomeintocontactwiththegyrowhileitisprecessing.Ifitisever
necessarytotouchthegyrowhiletheflywheelisspinning,theLockbuttononthe
Keypadmustbedepressedtostopthegyrofromprecessing.Gyromaintenance
shouldnotbeattemptedunlessthegyroislockedandtheflywheelhasstopped
spinning.
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1.1GyroAssembly
Thegyroassemblyconsistsofaflywheelhousedinacastaluminumvacuum‐tightenclosure.The
flywheelspinsaboutaverticalaxisandissupportedbyupperandlowerpairsofbearings.ADC
brushlessmotormountedinsidetheenclosurespinstheflywheelathighspeed.
Theenclosureisfastenedtotwogimbalshaftsthataresupportedbygimbalbearingsoneitherside.
Theseshaftsestablishanathwartshipgimbalaxisaboutwhichtheflywheelandenclosureprecessor
rotateupto+/‐60degreesduringoperation.Eachofthegimbalbearingsissupportedbyasaddlebeam
whichisbondedtothehullstructure.Thesebeamstransfertheloadsthatthegyroproducestothehull
structure.
Anactivehydraulicbrakemechanismislocatedonthegyroassemblytoregulatethegyro’sprecession
motionsaboutthegimbalshaft.Itincludestwohydrauliccylindersmountedonthebrakesaddlebeam
andahydraulicmanifoldonthenon‐brakesaddlebeam.
Acoolantpump,heatexchangerwithreservoir,andthermostaticmixingvalvearelocatedonthebrake
saddlebeamnearthehydrauliccylinders.Bracesforwardandaftoftheenclosureconnectthebrake
andnon‐brakesaddlebeams.Aglycol/watermixiscirculatedthruaclosedlooptothemotordrivebox,
hydraulicmanifold,andtheendcapsoftheenclosuretoremoveheat.
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FIGURE3–GYROASSEMBLY

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1.2 Display
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ThedisplayshownbelowistheuserinterfacetotheModel8000Gyroandshouldbemountedatthe
primaryhelmstation.Itisusedtostart,operate,monitorandshutdowntheGyro.Sensors,alarmsand
shutdownsareprovidedtoallowunattendedoperation.Howeverthegyroisahigh‐speedmachineand
specialattentionshouldbepaidtovibrationandnoiseasthiscouldbethefirsthintofamechanical
problem.
Thedisplayprovidesinformationintheeventofanalarm.Alarmscauseprecessiontostop(LOCK)and
thegyrotostartcoastingdown(STOP).
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FIGURE4–OPERATORDISPLAY
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1.3 CompactMotorDriveBox
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TheCompactMotorDriveBoxcontainstheelectroniccomponentsthattake208‐230VACat50/60Hz
fromtheboat’sgeneratororshorepowerandsupplycurrenttotheflywheelmotoraccordingto
commandsfromtheGyroControlBox.Theglycol/watermixthatcoolsthegyroisalsocirculated
throughacoldplateinsidethedriveboxtoremoveheatfromhi‐powerelectroniccomponents.
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TheCompactMotorDriveBoxcontainshighvoltageelectronicsand
thecovershouldnotberemovedwhiletheflywheelisspinningexcept
byanauthorizedtechnician.Thishighvoltageexistsevenifthe
flywheeliscoastingdownandthesupplyvoltagehasbeenshutoff.
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FIGURE5–COMPACTMOTORDRIVEBOX(Left)FIGURE6–COMPACTMOTORDRIVEBOX(Right)
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1.4 GyroControlBox
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TheGyroControlBoxcontainsmotionsensorsandacontrollermodulethatmonitorsandautomatically
regulatesoperationofthegyro.
Themotionsensorsuitecontainsratesensorsthatmeasuretheangularmovementsofthevesseland
accelerometersthatmeasuretheverticalandlateralboatmovement.
Thecontrollercommandsthemotorspeedandregulatesthegyro’sprecessionrateandgimbalangle.
Thisisaccomplishedbycommandstoahighresponseflowcontrolvalveinthehydraulicbrakecircuit
thatincreasesordecreasesbrakepressure.
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FIGURE7–GYROMOUNTEDCONTROLBOX

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1.5 Brake
Thebrakemechanismconsistsoftwohydrauliccylinderswhicharemountedonthebrakesaddlebeam
andattachtoacrankarmonthegyrogimbalshaft.Thehydrauliccylindersareplumbedtoamanifold/
valveassemblysowhenthegyrorotatesaboutthegimbalaxis,oilfromonesideofeachcylinderis
pushedthroughthehighresponseflowcontrolvalveintothesamesideoftheothercylinder.Thegyro
controllermodulateshowfasttheoilcanflowthroughthecontrolvalvethuscontrollingtheprecession
rateofthegyro.
Thebrakehydrauliccircuitisapre‐chargedclosedloop–thatis,thereisnopump,motororreservoirin
thecircuit.Accumulatorsareinstalledinthecircuitsotheprechargepressuredoesnotincreaseasthe
fluidtemperaturerisesduetothebrakingaction.Lockingsolenoidsareinstalledinthecircuittolock
thegyrosoitcannotprecessifthereisaleakinthecircuitoramechanicalproblemwiththegyro.
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FIGURE8–BRAKE

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1.6 Cooling
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Thecoolingcircuitisaclosedloopthatsuppliesaglycol/water(50%distilledwaterand50%glycol)mix
to:
Themotordriveboxtoremoveheatfromthedriveelectronics
Thebrakemanifoldtoremoveheatfromthebrakehydrauliccircuit
Thegyroenclosurewaterjacketstoremoveheatfromtheflywheelbearings
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Theheatedfluidthenpassesthroughathermostaticmixingvalvebeforebypassingorflowingthrougha
heatexchangerthathasseawateronthecoldside.Thecircuitalsocontainsacoolantreservoirfor
coolantexpansionandtomakefillingeasy.Thereservoircontainsa7psi(0.5bar)pressurecap.
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FIGURE9–COOLINGSYSTEMCOMPONENTS
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OPERATION
MANUAL
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MODEL8000GYRO90141311of11
Section1:SYSTEMOVERVIEW
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FIGURE10–COOLINGSYSTEMCOMPONENTS(GyroEnclosureHidden)

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OPERATION
MANUAL
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MODEL8000GYRO9014131of11
Section2:SYSTEMOPERATION
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2.0 Introduction
ThissectiondescribesoperationoftheSeakeeperModel8000Gyrosystem.
2.1 DisplayScreens:Overview
1) When24VdcisappliedtotheGyroControlBoxtheDISPLAYwillpowerupandinitialize.The
SPLASHscreenwillbedisplayed
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2) AftertheDISPLAYhasinitializedtheHOMEscreenwillbedisplayed
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3) TheDISPLAYhasasetoffivebuttonsthatareundertheBUTTONICONSthatappearonthe
displayscreen.TheBUTTONSarethemeansforselectingthefunctionsoftheDISPLAY.
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OPERATION
MANUAL
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Section2:SYSTEMOPERATION
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a. HOMEScreenBUTTONICONfunction
i. GYROON/OFFandFAULTRESET
1. TheICONwillchangefromred(GYROOFF)togreen(GYROON)
2. TheICONwillturnredindicatingtheGYROisoffwhenafault
appears
3. WhenaFAULToccurstheBUTTONisusedtoresettheactivefault
ii. GYROLOCK/UNLOCK
1. WhentheGYROcontrolisinitializing,ortheGYROoff,thelock
symbolswillbothbeblue
2. WhentheGYROisinLOCKmode,stabilizationisoff,theLOCK
symbolwillbered
3. WhentheGYROisUNLOCK,stabilizationison,theUNLOCKsymbol
willbegreen
iii. DISPLAYDAY/NIGHT
1. TogglestheDISPLAYbrightnessbetweentheDayandNightsettings
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OPERATION
MANUAL
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MODEL8000GYRO9014133of11
Section2:SYSTEMOPERATION
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iv. HOMESCREENVIEW
1. SwitchestheHOMEscreenviewsfromananimationscreen,toa
screendisplayingarrowswithnoanimation,toascreenthatshows
GYROrateonagraph
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HomeScreenwithAnimation:
Flywheelwillbespinningand
gyrostabilizing
HomeScreenwithArrowsfor
flywheelspinningandstabilizing
HomeScreenindicatingGyro
Rate
v. SETTINGSSCREEN
1. ChangesfromtheHOMEscreentotheSETTINGSscreen
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OPERATION
MANUAL
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Section2:SYSTEMOPERATION
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4) WhenthebuttonisdepressedfortheSETTINGSscreentheDISPLAYchangestothe
SETTINGSscreen
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a. SETTINGSscreenBUTTONICONfunctions
i. AllowsthebrightnessoftheDISPLAYtobeincreasedordecreased.
ThebrightnesssettingsfortheDAYorNIGHTmodescanbeindependently
adjustedbyselectingtheDAYorNIGHTonthemainpagebeforeentering
theSETTINGSscreen.
1. WhenthebuttonisdepressedtheBRIGHTNESSsettingsappears
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2. TheBRIGHTNESSisdecreasedorincreasedbydepressingthe
MINUSbuttonorthePLUSbutton 
3. TonavigatebacktotheSETTINGSscreentheBACKbuttonis
depressed
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