GMN 5366TP-2004 Vehicle Stability Enhancement Syst

NorthAmericanENGINEERINGSTANDARDSTestProcedureGM5366TPVehicleStabilityEnhancementSystemHighSpeedTestingOriginatedDate:April23,2004GMN5366TPRevisedDate:ApprovalDate:June4,2004Page1of111IntroductionNote:Nothinginthespecification,however,supersedesapplicablelawsandregulationsunlessaspecificexemptionhasbeenobtained.Note:IntheeventofaconflictbetweentheEnglishandthedomesticlanguage,theEnglishlanguageshalltakeprecedence.1.1Purpose.ToevaluatetheVehicleStabilityEnhancementSystemperformanceduringhighspeedmaneuvers.1.2Foreword–N/A1.3Applicability–N/A1.4Definitions.2ReferencesNote:Onlythelatestapprovedstandardsareapplicableunlessotherwisespecified.2.1Normative–N/A2.2GMSSTS3.2.1.4.4VSESHighSpeedEvasiveManeuvers.2.3Additional–N/A3Resources3.1Facilities.3.1.1Laboratoryfortestvehiclebuildandinstrumentationinstallation.3.1.2Surfaceareamustbeofsufficientsizetoaccommodatetestmaneuverswithoutvehicleleavingsurface.3.1.3Vehiclesweighstationcapableofmeasuringvehicleweightateachcorner.3.2Equipment.3.2.1Brakepressuresensorslocatedateachcornerandatmastercylinder.3.2.2Vehiclesteeringwheelanglesensor.3.2.3Vehiclevelocitysensor,VxandVy3.2.4Vehiclesideslipanglesensor3.2.5Yawratesensoratvehicle’scenterofgravity(+/-75deg/sec)3.2.6Lateralaccelerometeratvehicle’scenterofgravity(+/-1.25G’s)3.2.7Longitudinalaccelerometeratvehicle’scenterofgravity(+/-1.25G’s)3.2.8Wheelspeedsensorsateachcorner.3.2.9Brakepedalforce3.2.10Brakepadtemperaturesateachcorner(150to200degreesF)3.3TestVehicle/TestPiece.SeeProcedureSection3.4TestTime.Calendartime:2DaysTesthours:8hoursCoordinationhours:6days3.5TestRequiredInformation.SeeProcedureSection3.6Personnel/Skills.Experiencedvehicledynamicstesttechnicianforvehicleinstrumentation.Vehicledynamicstestdrivercertifiedforhandlingtests.NorthAmericanENGINEERINGSTANDARDGMN5366TPOriginatedDate:April23,2004GMN5366TPRevisedDate:ApprovalDate:June4,2004Page2of114Procedure4.1Preparation.4.1.1InstrumentationInstallationAllinstrumentationmustbesecurelyfastenedtothevehicleduetothenatureoftestmaneuver.Instrumentationshouldbelocatedonthepassengerorrearseatstoavoidexcessiveballastintherearofthevehicle.4.1.2VehiclePreparationBallastvehicletocurbweightbeforeinstallationofinstrumentation.Afterinstallation,thevehiclemustbewithinsuspensionalignmentspecifications(toe)withafulltankofgas.Tirepressuresshouldbesetto5psiaboveplacard;tiretubesarerecommended,especiallyonhighcenterofgravityvehicles.Tiresshouldbebrokeninbutmustnothaveexcessivewear.Brakepadsshallbeburnishedpriortotest.Rollcagesforlowcenterofgravityvehicles(cars)shallbeused,andoutriggersshallbeaddedforhighcenterofgravityvehicles(trucksandcrossovers).Forspeedsofgreaterthan100mph/161kphorgreater,seeAppendix1(GMTrafficSafetyHighSpeedRegulations).4.1.3OperatorsPrecautions.Allinstrumentationmustbesecurelyfastenedduetothenatureofvehicledynamicstesting.Thevehicleoperatormustusethevehiclerestraintsystematalltimes.Thevehicle’sairbagshouldbedisarmedduetothesteeringwheelangelsensorinstallation.Vehicletestingmustbedoneinthemiddleofatestsurfacetoavoidleavingtheboundariesofthetestsurface.4.1.4WarningIndicatorsVSESandABSwarningindicatorsmustbeclearlyvisibleandinworkingcondition.4.1.5VSESSupplierParticipationItishighlyrecommendedforchassiscontrolsperformanceengineertocoordinateVSESsupplierparticipation.PerformanceengineermayelecttousethisprocedureasatooltoguideVSEShighspeedcalibration.Uponcompletionofcalibrationdevelopment,performanceengineershallformallyconducttestprocedure.Duetosupplier’sinvolvement,itishighlyrecommendedthatthetestvehiclebeequippedwithsupplier’sinstrumentationtoassistinissueresolutionsifapplicable.4.2Conditions.4.2.1EnvironmentalConditions.Windspeedshouldbelessthan20MPH,itshouldnotberaining.4.2.2TestConditions.ThetestshouldbeperformedinthedesignatedareaattheGMVehicleDynamicsTestArea(BlackLake)SiteFacility,OvalTrack,orCircleTrack.Testtrackshouldbedrywithsurfacefrictioncoefficientbetween0.8and1.0,unlessotherwisedirectedbyrequestor.NOTE:Deviationsfromtherequirementsofthistestprocedureshallhavebeenagreedupon.Suchrequirementsshallbespecifiedoncomponentdrawings,testcertificates,reportsetc.4.3Instructions.4.3.1ZeroInstrumentationDrivevehiclestraight-ahead.Thelongitudinal/lateralaccelerometershouldbeat0+/-0.02G’srespectivelywithvehicletravelingstraightaheadwithnovehicleaccelerationordeceleration.Thesteeringwheelangelsensorshouldbe0+/-1.0degreeswithvehicletravelingstraightahead.Yawratesensorshouldbeat0+/-0.5degreespersecond.DatronVyspeedshallbe0+/-0.1kph.Brakepressuresensorsshouldbeat0+/-10psiwithnobrakepedalinput.4.3.2ThefollowinglistedmaneuverswillbesubjectivelyevaluatedbythedesignatedchassiscontrolsperformanceengineertoassesstheperformanceleveloftheVehicleStabilityEnhancementSystem(VSES).Thefoundationturnmaneuverisdefinedastakingthevehicletothemaximum,between90%-100%,lateralaccelerationbyusingasteeringinputlessthan45oper/sec.ThedriverwillthenallowthevehicletostabilizeforthreeNorthAmericanENGINEERINGSTANDARDGMN5366TPOriginatedDate:April23,2004GMN5366TPRevisedDate:ApprovalDate:June4,2004Pag