valin thorn may 12, 2000 - spaceref · valin thorn may 12, 2000 iss program integration office...

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Valin Thorn

May 12, 2000

ISS Program Integration OfficeVehicle Integrated Performance and Resources (VIPER)

[email protected]

Alternative Propulsion Module Assessment Team

Valin Thorn

2

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Purpose & Agenda

Purpose

Explain need for US Propulsion Module, basicrequirements, and when needed

Agenda

Why Build A Prop Module?What Prop Module Is Needed?When Is Prop Module Needed?

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! Critical ISSGN&C/Propulsionfunctionality residesonly with Russian &European assets" Altitude

maintenance/reboost

" Debris avoidancemaneuvers

" Attitude control

" Propellant resupply

! Service ModuleGN&C/Prop system is1FT

Why Build Prop Module?

Critical ISS Functionality

ISS Propulsion Asset BasicsOrbiter

Reboost Generic

ISS Mission

Orbiter Max

Reboost Mission

Prop Module

FGBService Module

Progress M

Progress M1

ATV ICM

Max Propellant For ISS

(Useable)

232AC w/FICS

1626AC w/FICS

9809 5500 860 1100 1950

4000 MMH/NTO

860 UDMH/NTO

5000

Guidance # # # # SM SM SM #

Navigation # #GPS

(USOS)GPS

(USOS)SM SM SM #

Control/Thrusters # # # # # # # #

Disabled After SM Arrival

Russian & European Assets

Units Are kg (2.2 lb / kg)

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Orbit Reboost & Debris

Avoidance Maneuver

Prop90%

Attitude Control Prop

10%


Critical ISS Resource

! ISS needs an average of7000 kg of propellanteach year for altitudemaintenance, debrisavoidance & attitudecontrol" Total life need 105,000 kg/

231,000 lb (thru 2014)

! Reserve propellantprovides one year of ISSorbit life in case ofsupply interruption

ISS Propellant Required Vs. YearAssembly Sequence Rev E, Planning Atmosphere

0

2000

4000

6000

8000

10000

12000

14000

16000

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17Year

Pro

pel

lan

t (k

g)

Reserve Prop

Prop Required

ISS Assembly Rev E ISS Assembly Complete

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ISS Propellant Supply

! Multiple supplyvehicles are requiredto satisfy the ISS’s7000 kg annualaverage propellantneed

! Current plan for6 Progress M1’s/yearmeets need" P-M1’s not planned for

maximum prop load toincrease dry cargocapability

ISS Propellant Supply Vehicles Vs. Prop Required

0

1000

2000

3000

4000

5000

6000

7000

8000

9000

10000

11000

12000

ProgressM

ProgressM1

Prog M1 X3 Flights

Prog M1 X6 Flights

ATV OrbiterReboost

Nom MissX 5 Flts/Yr

OneOrbiter

MaxReboostMissionISS Propellant Supply Vehicle

Eq

uiv

alen

t P

rop

ella

nt

(kg

)

Peak Annual ISS Prop Required

Average Annual ISS Prop Required

(ISS Assembly Complete)

Planning Atmosphere

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Prop Supply Scenario Comparisons

! Increase annual ATV supply" Requires 0.45 more ATVs / year than

agreement" First available late 2003" Russian dependency" Dependency on ESA for critical

functionality…?

! Orbiter Max Reboost Missions" Requires ISS “Supplemental” Prop

Module (SPM) to provide attitudecontrol and debris avoidancemaneuvers

" Extra Shuttle mission required tomeet logistics req’t

✦ Peak altitude maintenance years require7 Shuttle missions

" Consumes ISS structural life" Dependent on VRCS, 0 FT system

! US Propulsion Module" Max prop supply flight needed every

4 years – also used for otherlogistics support

0

1000

2000

3000

4000

5000

6000

7000

8000

ISS

Eq

uiv

alen

t P

rop

ella

nt

3 Prog M1's

5 Orb Nom

Reboost

5 Orbiter Nom

Mission Prop

Resupply

US Prop Module3 Prog

M1's

0.8 ATVs

0.8 ATVs

1.25ATVs

6 Orbiter Reboost

& Logistics Missions

5 Orb Nom

Reboost

8660 kg 14310 kg

Annual Av Prop Req't

Annual Av Prop Req't(No Russians)

RequiresProp Module

For ACS & Debris

Avoidance Maneuvers

None None

Additional Shuttle Mission Required To Meet Logistics

Req't

NoneDry Cargo

Impacts Russia Out, No Progress Vehicles, 4 Crew ISS,No Dry Cargo Shift Req'd

Shuttle Covers RS Dry Cargo

Shortfall, 3190 kg, + 0.6 Flts/Yr

ATV Covers RS Dry Cargo Shortfall, 3190 kg

3 Progress M1sOrb Reboost X 5

3 Progress M1s0.8 ATVs

(ATV:Prop 2810kg / Dry Cargo 3190

kg)

Russia Out

0.8 ATVOrb Reboost X 5

Russia Out

1.25 ATVs

Russia Out

Orbiter Reboost & Logistics Missions

Russia Out

Orb Reboost X 5US Prop ModuleMax Prop Supply

Flt

Scenarios

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Temporary Loss Of Prop Assets

! Temporary loss ofRussian propellant supplyassets does not requireU.S. propulsion module" Reserve/skip cycle propellant

protects 1 year of orbit lifetime" Shuttle ISS reboost available,

not relied on to protect 1 yearof orbit lifetime

" ICM can replace the equivalentof 2.6 Progress M1’s

! Soyuz launch vehiclereliability high" 97.8% since 1973" 97.7% since 1993

ISS Propellant Required Vs. YearAssembly Sequence Rev E, Planning Atmosphere

0

2000

4000

6000

8000

10000

12000

14000

16000

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17Year

Pro

pel

lan

t (k

g)

Reserve Prop

Prop Required

ISS Assembly Rev E ISS Assembly Complete

ICM

=

ProgressM1’s

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! Risk that ISSGN&C/Propulsionfunctionality andresource may be lost isunacceptable" The extreme consequences

of losing a multi-billiondollar international assetrequire driving theprobability of occurrence tozero

! Alternate means for ISSGN&C/Propulsion systemfunctions are required forpotential loss of Russianpartnership

✦ Risk of unfriendly break-up

?

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What Prop Module Is Needed?

! ISS attitude control" Attitude maneuvers & hold

✦ Visiting vehicle prox ops & dockings✦ Attitude recovery from free-drift

" CMG reset/desaturation✦ CMG’s provide steady-state attitude

control, not maneuver capability

! ISS orbit maneuver control" Altitude maintenance (~5/year)" Debris avoidance(~3/year)

! Locate on US segment ofISS -- front" No interference with Russian

segment build, Progress vehicleoperations, and ATV operations

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When Is Prop Module Needed?

! Propulsion Moduleneeded by mid 2003 inmost contingencyscenarios

! ICM lifetime key driver" 3 year certified life

" Avionics not in-orbitserviceable

" ICM not returnable

! With SM installed, ATVmay provide more timein no Progress vehiclescenarios

ICM

Prop Module(PDR Baseline)

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11




No Service Module, Minimum Russian Support

ICM-FGB/ICM-FGB/ICM-Shuttle

S tage

I C M

C R V

P r o pModule

Flt .Att.

C r e wOnboard

2A.2 B 2A.3 3 A 4 A 5 A 5A.1 6 A 7 A 7A.1

XVV/XPOP

Traj & A t tControl(SS, Man,A l t )

A T V

10A? ? ? ? ? ? ? ? ? ?

XNS

20011 2 3 4

20021 2 3 4

20031 2 3 4

20041 2 3 4

20003 4

YearQuarter

FGB/FGB/Prog-ShtlFGB/FGB/FGB CMG/ICM/Shuttle-ATV-ICM

St ill D es ign For PM On Front/Node 2

F G B

20051 2 3 4

20061 2 3 4

" ICM On ly Ce rt i fied To Stag e7A.1

" CRV Wi th Cu rr ent Fund ing May 0 5" CRV Wi th Cr is is Ef fort, P re-Node 3Locat ion On Node 1 Port Side On CB A

ECLSS In US Lab Before CRV

CMG/PM/Shuttle-ATV-PM

" Boeing Reported Fir st PMJuly 04

" PM2 For 2 Fault Toler ance

" Pre fer Node 2 I ns tall Before P M

" ICM Ce rt i fied In O rbit L i fe Lim it 3 Years

" Start FGB Life Exte ns io n" FGB Cert Expires 5 /01 FGB Life E xtens ion For At t itude Control – No Reboost

"Pla nned F irs t PMJuly 03

" Pla nn ed Fir st ATV Ju ly04

" Cert ify I CM For Cont rol Of Sta ges Beyond 7 A.1

----- Continue Normal Build ---!!!!

Progress

D es ign For ATV Docking To FGB Aft, ATV AddsGN&C Capab il i ty, Mod ATV D oc king Me ch anis m

Preliminary

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No SM, No Progress Vehicles

ICM-FGB/ICM-FGB/ICM-Shuttle

S tage

I C MShutt leMaxReboostFl ight s

C R V

P r o pModule

Flt .Att.

C r e wOnboard

2A.2 B 2A.3 3 A 4 A 5 A 5A.1 6 A 7 A 7A.1

XVV/XPOP


A T V

10A? ? ? ? ? ? ? ? ? ?

XNS

20011 2 3 4

20021 2 3 4

20031 2 3 4

20041 2 3 4

20003 4

YearQuarter

FGB/FGB/Prog-ShtlFGB/FGB/FGB CMG/ICM/Shuttle-ATV-ICM

St ill D es ign For PM On Front/Node 2

D es ign For ATV Docking To FGB Aft, ATV AddsGN&C Capab il i ty, Mod ATV D oc king Me ch anis m

F G B

20051 2 3 4

20061 2 3 4

" ICM On ly Ce rt i fied To Stag e7A.1


ECLSS In US Lab Before CRV

CMG/PM/Shuttle-ATV-PM





" Start FGB Life Exte ns io n" FGB Cert Expires 5 /01 FGB Life E xtens ion For At t itude Control – No Reboost


" Pla nn ed Fir st ATV Ju ly04



" US Comma nd & Cont rol

Preliminary

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Service Module Then No Progress Vehicles

Stage

I C MShutt leM a xReboostFl ights

C R V

P r o pModule

Flt .Att.

C r e wOnboard

2A.2 B 2A.2 C 3 A 4 A 5 A 5A.1 6 A 7 A 7A.1

XVV/XPOP


A T V

10A? ? ? ? ? ? ? ? ? ?

XNS

20011 2 3 4

20021 2 3 4

20031 2 3 4

20041 2 3 4

20003 4

YearQuarter

ICM/ICM/Shuttle-ICMFGB/FGB/FGB

CMG/ICM/Shuttle-ATV-ICM

Still Design For PM On Front/Node 2

S M

20051 2 3 4

20061 2 3 4

" ICM On ly Ce rt i fied To Stage 7 A.1


ECLSS In SM

CMG/Shuttle-ATV-PM/Shuttle-ATV-PM




" SM Control & Maintenance?

" Fir st ATV WithC ri sis Funding D at eTBD

" Pla nn ed Fir st ATV Ju ly 04



XVV Only After 12A.1

No Permanent Crew Until C R V




Preliminary

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14



When Is Prop Module Needed?Loss of SM at Launch, Russia Remains Full Partner

ICM-FGB/ICM-FGB/ICM

Stage

I C M

Progress

Soyuz-TM

Prop. Module

Flt .Att.

C r e wOnboard

2A.2 B 2A.3 3 A 4 A 5 A 5A.1 6 A 7 A 7A.1

XVV/XPOP


A T V

8 A? ? ? ? ? ? ? ? ? ?

ECLSS In US Lab

XNS

20011 2 3 4

20021 2 3 4

20031 2 3 4

20041 2 3 4

20003 4

YearQuarter

20051 2

ICM/ICM/ProgFGB/FGB/FGBCMG/ICM/Prog

CMG/PM/PM

SM Repla cement Wit hA&RD Incl Added Prop

Capabil it y

Cont inue Normal Build


" ICM Ce rt i fied In O rbit L i feL imit 3 Years

" FGB Cert Expires 5 /01F G B" Execute FGB Life Extension

" Cert ify I CM For Cont rol Of Sta ges Beyond 7 A.1" ICM On ly Ce rt i fied To Stage 7 A.1

Requir es SM R eplac ement Fir st



Preliminary

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15



Summary

! New short term contingencyinsurance policy not required

" ICM almost ready" Shuttle reboost w/FICS" Propellant reserve

! U.S. Propulsion Module needed toback-up critical ISS functionality incase of Russian melt-down

" Altitude maintenance/reboost" Debris avoidance" Attitude control" Propellant resupply

! Prop Module needed by mid 2003 toprotect loss of Progress vehiclesupport

! Need short term contingencystrategy for ISS development &operations until PM ready

?

ICM

Propulsion Module(PDR Design)

Russians?

valin thorn may 12, 2000 - spaceref · valin thorn may 12, 2000 iss program integration office...

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