improved engineering diagnoscs for space exploraon · • sofware introduces marker 102 before and...

102

103

104

105

106

107

Raw

CPS

2013 2014 2015 2016Year

m/z 28 m/z 15 m/z 14 m/z 13

Background Counts Trending

MassRa&oReadingsDuringSameMarkerforAllRuns

819

682

546

409

Total(hrs)

273

136

0

limit

Oct‘14 Jan‘15 Apr‘15 Jul‘15 Oct‘15 Jan‘16 Apr‘16 Jul‘16 Oct‘16 Jan‘17 Apr‘17

WRPOn-Time

DuraFon–nolimit

WRPon-Fme-350hrlifeFme–138%

WRPon-offcycles–nolimit

Filament1on-Fme-265hrlifeFme–53%

Filament2on-Fme-265hrlifeFme–7%

ElectronmulFplier1on-Fme–nolimit

ElectronmulFplier2on-Fme–nolimit

WRPSwapped

25052

25060

25068

25076

25084

25092

25100

25108

25116

25124

25132

25140

25148

25156

25164

25172

25180

25188

25196

25204

25212

25220

25228

25236

25244

25252

25260

25268

25276

25284

25292

25300

25308

25316

25324

25332

25340

25352

25360

25368

25376

25384

25392

25400

DeltaTrend

RFTemp. BestFit(0.2325x-248.28)

EXPID–ExperimentIdenBfier

1100

1120

1160

1180

1200

Ch11RFPressure-mbar

1140

-1

1

0

0.5

-0.5

5

10

15

20

25

30

35

Tempe

rature(C

)De

ltaValu

e

TrendingRFPressureVersusTemperature–ElectricalBaselineTests–SAMFlightModelonMars

Jan‘13

Jan‘14

Jan‘15

Jan‘16

Jan‘17

1200mb

1150mb

1100mb

RawData

SAMFMValve2Func/onDuringEBTh9ps://goo.gl/HiRdOp

HARDCODEDNO

V2OPSDURINGGETTERREPAIR

LAUNCH LANDING

EARTH MARS

1

6

5

4

3

2

VOLTAGE(V)

2009

2010

2011

Ch210:CAP+_Vmon(Capacitor+VoltageMonitor)Average

2012

2013

2014

2015

2016

2017

0

2

4

6

345 346 347 348 349

Voltage

TIME-Sec

CAP+_Vmon-October2014

MARKER102

MaximumVoltageDuringMarker102

MinimumVoltageDuringMarker102

LimitCheckReport(May2010)ShowingNon-Opera/onalV2

ImprovedEngineeringDiagnos1csforSpaceExplora1onB.D.Prats1,2,M.S.Johnson1,3,C.A.Malespin1,E.Lyness1,3,W.Brinckerhoff1,P.R.Mahaffy1andN.Dobson1,4

1NASAGoddardSpaceFlightCenter,Code699,benito.d.prats@nasa.gov,2eINFORMe,INC,3MicrotelLLC,4LinearLabs,LLC

•  Past,presentandfutureelectro-mechanicalsystemson-earth, on-orbit, on other planets and moons must bedesignedwithsufficientdiagnosUccapabiliUestoassuresafety,accuracy,compliancyandlongevity.

•  Unique technologies at the NASA GSFC PlanetaryEnvironments Laboratory enable robust system healthmeasurements during all phases of daily operaUons;integraUon,test,refurbishment,calibraUonandscience.

[1]Mahaffy,P.R.etal(2012)SpaceScienceReview170,401-478.[2]Goetz,W.etal(2016)Int.JournalofAstrobiology,Vol.15,Iss.3,239-250.[3]Brunner,A.E.etal(2013)LPSC,Abstract#2053.[4]Malespin,C.A.,etal(2015)LPSC,Abstract#2558.

Figure1.SAMValveV02HealthTrend-CapacitorRe-ChargeVoltage

•  NASA S AM ( S amp l e A n a l y s i s a t Ma r s ) :Instrument suite on-board NASA Mars ScienceLaboratory (CuriosityRover) launchedNovember2011,landedAugust2012nowin5thyearofconUnuing,Mars-surfaceatmosphericandsamplescienceoperaUons[1].

•  MOMA-MS (MarsOrganicMolecularAnalyzer):Linearion trap mass spectrometer built by NASA GoddardSpace Flight Center on-board ESA-Roscosmos ExoMarsRovertobelaunched2020&landingonMars2021[2].

•  Missionhistorywithnineyearsofhousekeepingtrendsprovide on-going data-analysis tool development andideasfor futurespace-missionhealthchecktoolstobeusedbylife-sustainingequipmentonmanned-missions.

•  ProperdesignandrobusthealthdiagnosUcsarecriUcalforsystemdesignandfortargetedoperaUonalfeatures.

Figure3.MOMA-MSEngineeringConsumablesPagefromXINA

•  Marks in telemetry idenUfy very parUcular instrumentstatestoquicklyexaminescience&housekeepingdata.

•  Markers allow quick and easy capture of problemsduringintegraUon,calibraUon,tesUngandoperaUons.

•  Figure 1 shows SAM valve operaUon on Mars duringmonthlyelectricaltests(healthchecks)usingamarker.

•  Sofware introduces marker 102 before and duringcapacitorre-chargetotrackvalveV02health.

•  Valve V02 at marker 102 shows a steady, consistentfive-yeartrendforconUnuingMarsscienceoperaUons.

•  Figure 2 shows temperature compensaUon tools thatremoveexternaleffects;SAMRFpressureflat&steady.

•  XINA shows real-Ume consumable metrics; pumpoperaUnghours,filamenton-Ume,valvecycles,etc.

•  Figure 3 shows flight MOMA-MS consumables pageincludingusageandremaininglifeofcomponents.

•  TrendsprovidedbyXINA tools candetectun-expectedusageorchangesthatallowrepairpriortolaunch.

•  Figures 1, 2 and 3 were created using XINA, a tooldeveloped at NASA/GSFC, that provides web-basedaccess to housekeeping and science data for SAM,MOMA-MSandfourothermissions.

•  To assess instrument health, Python tools have beendeveloped to quickly idenUfy temperature, voltage,pressuresthatmaybeoff-nominal(seeinset–Fig.1).

•  Figure 4 shows mass spectrometer science trendsproducedusingWaveMetricsIgorPro7&add-ons[3].

•  ElectronmulUpliervoltagewas increased forSAMTestBed[4]toimprovedataasaresultofthisIGORanalysis.

•  Lessons learned; disciplined use of markers early inproject can yield far bener data analysis (includingcustom tools) later and can quickly provide a robust,accessibledatadistribuUonsystemfortheprojectteam.

•  These techniques, used in future space-exploraUonmissions,canassurecompliancy,longevityandsafety.

Figure4.BackgroundMassRaGoPreparedUsingIgorPro7-SAMTestBedScience–ShowingDegradaGonofElectronMulGplier

•  Flight sofware and scripts for SAM and MOMA-MSwere purposely designed with the ability to uniquelymarkdatabasedoncontexttoallowdatatrending.

Figure2.RFPressureTrendingusingXINA