Exomars Orbiter Module Bus OMB - ESA

1EXOMARS industrial day 2010

Exomars Orbiter Module Bus

OMB

TAS-F – 23rd Sept 2010

Exomars Industrial day- Turin


Exomars OMB definition

� Exomars OMB will:� serve as a carrier to deliver the

EDM at the right landing latitude in the 2016 Mission

� carry the five science payloads provided by JPL and stay around Mars for about 5.5 years

� Provide data relay capability in UHF to all Mars landed assets from Jan 2019 up to end 2022

Central tube & primary structure

Propellant tanks & Helium tanks


Exomars OMB Responsibilities

� TAS-F is Prime of the Orbiter Module Bus Prime

� The OMB is composed of :� Mechanical, Thermal & Propulsion (MTP) : OHB responsibility� Avionics, Electrical & Radio-frequency (AER) : TAS-F

responsibility

MTP AER


Exomars OMB Product tree

� Exomars OMB product tree:OMB

CSS

STR

GNC

TAS-F

OHB

HGA-Assy

X-DST

Telecom

TWTA

LGAs

RFDN

E 111

OMB AER system

E 1111

OMB MTP system E 1112

E 11113 E 11114

PCDU

Battery

Power

Harness

assy

E 11111

E 111111

E 111112

E 111113

Solar ArrayE 11112

Structural PanelE 111121

MechanismsE 111122

E 111131

E 111132

E 1111411

E 1111412

E 1111414

E 1111415

E 1111416

Data Handling

SMU

E 11115

E 111151

Photo Voltaic Assy E 111123

GSEK

X-Band UHFE 111141 E 111142

OBSW

PDHU

IMU

RWAUHF Transceiver*

UHF RFDN

UHF Antenna

SADM E 111124

*CFE

E 111152

E 111153

E 111133

E 111134

E 1111423

E 1111422

E 1111421

RCU

OMB

CSS

STR

GNC

TAS-F

OHB

HGA-Assy

X-DST

Telecom

TWTA

LGAs

RFDN

E 111

OMB AER system

E 1111

OMB MTP system E 1112

E 11113 E 11114

PCDU

Battery

Power

Harness

assy

E 11111

E 111111

E 111112

E 111113

Solar ArrayE 11112

Structural PanelE 111121

MechanismsE 111122

E 111131

E 111132

E 1111411

E 1111412

E 1111414

E 1111415

E 1111416

Data Handling

SMU

E 11115

E 111151

Photo Voltaic Assy E 111123

GSEK

X-Band UHFE 111141 E 111142

OBSW

PDHU

IMU

RWAUHF Transceiver*

UHF RFDN

UHF Antenna

SADM E 111124

*CFE

E 111152

E 111153

E 111133

E 111134

E 1111423

E 1111422

E 1111421

RCU


Exomars OMB MTP/ product tree

� Exomars OMB / MTP product tree (See OHB presentation)

GSEK

OMB system

OMB

Tanks

PIA

PCA

Propulsion

TAS-F

OHBE 111

OMB MTP

systemE 1112

E 11124

Thermal ControlE 11123

Structure assy

E 11121

Central TubeE 111211

Structure panelsE 111212

BracketsE 111213

E 111241

E 111242

E 111243

E 1111

Active elements

Passive elements

E 111231

E 111232

Engines

and thrustersE 111244

GSEK

OMB system

OMB

Tanks

PIA

PCA

Propulsion

TAS-F

OHBE 111

OMB MTP

systemE 1112

E 11124

Thermal ControlE 11123

Structure assy

E 11121

Central TubeE 111211

Structure panelsE 111212

BracketsE 111213

E 111241

E 111242

E 111243

E 1111

Active elements

Passive elements

E 111231

E 111232

Engines

and thrustersE 111244


Exomars OMB avionic architecture

� Exomars avionic architecture makes extensive use of 1553 bus for TM/TC of all units� Spacewire

and LVDS bus used for science & Rover data transfer via PDHU

SADM SADM

SA

Batteries

StarTrackers

CSS

Pyros to RCS,SA and HGA

deployment

HeaterHeater

Solar Arrays

Reaction Wheels

Rx

Tx

UHF antennasUHF

transceiversTCS

12 * 10 N thrusters

MainEngine424N

Pressure transducers

PPPPPP

Latchvalves

PCDU

Discrete links

PL 1553 bus

EDM Demonstrator

Interface with EDM

SMU

Spacewireor Packetwire

LGA 1 LGA 2

LGA 3

HGA

X-DST

X-DST

RFDN

TWTA

TWTA

APM

Gyroscopes

EDMpower line

LVDS data link

RC

S IF

PF 1553 bus

Science Payloads

MATMOS

HISCI

EMCS

SOIR NOMAD

MAGIE

PDHU

SBDL data link

Orbiter module bus : 2x1553 bus

SADMSADMSADM SADMSADMSADM

SA

Batteries

StarTrackersStar

TrackersStar

Trackers

CSS

Pyros to RCS,SA and HGA

deployment

HeaterHeaterHeaterHeater

HeaterHeater

Solar Arrays

Reaction Wheels

Rx

Tx

UHF antennasUHF

transceiversRx

Tx

UHF antennasUHF

transceiversTCS

12 * 10 N thrusters

MainEngine424N

Pressure transducers

PPPPPP

PPPPPPPPPPPPPPPP

Latchvalves

PCDU

Discrete links

PL 1553 bus

EDM Demonstrator

Interface with EDM

SMU

Spacewireor Packetwire

LGA 1 LGA 2

LGA 3

HGA

X-DST

X-DST

RFDN

TWTA

TWTA

APM

Gyroscopes

EDMpower line

LVDS data link

RC

S IF

PF 1553 bus

Science Payloads

MATMOS

HISCI

EMCS

SOIR NOMAD

MAGIE

PDHUPDHU

SBDL data link

Orbiter module bus : 2x1553 bus


Exomars OMB Mission phases

� ESA-NASA 2016 mission timeline

Q1 Q2 Q3 Q4Q1 Q2 Q3 Q4

2016 2017 2018 2019

Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4

Global Dust Storm Season

Global Dust Storm Season

Transfer

Aerobraking Orbiter in circular orbit

TGMI Science from circular orbit TGMI Science

& Rovers data relay

2016 Mission

Launch

2016 Lander EDL

2018 Rovers Landing

SuperiorConjunction

Wait in

4 SOL Orbit

Mars orbit insertion 4

sol

Elliptic

Release 4 sol

Science observations

science & Rovers data-

relay

Lander data

relay


End of

aerobraking

phase

Start of

aerobraking

phase

Exomars OMB – Design specificity

� Cruise phase : travel from Earth to Mars (10 months) –Stable attitude (only one face exposed to the sun)

� Aerobraking phase : 8 months of repetitive passes in Mars atmosphere to reach a circular orbit

� Primary mission : science mission July 2017- August 2019. Stable 2 hour orbit

� Secondary Mission : Jan 2019 – Dec 2022 : UHF data-relay . Same orbit as science orbit with different inclination.

1500W/m²

+X face


Exomars OMB AER / ITT-RFQ approach

� Exomars OMB / AER procurement approach

EPS & GNC

S/S Item Baseline approach ITT/RFQ Out KOM Comments

POWER PCDU ITT 15/09/2010 20/12/2010

updated kick-off date based on AIV/schedule optimisation

meeting EXM-MS-MIN-AI-0857 (8th July) / ITT converted

in RFQ / Release date planned on 15/09/2010 Closing

date to be changed to 29/10/2010.

POWER Battery ITT 18/02/2011 29/06/2011

POWERHarness

AssemblyITT 03/03/2011 12/07/2011

GNC IMU RFQ 17/11/2010 01/03/2011updated kick-off date based on AIV/schedule optimisation

meeting EXM-MS-MIN-AI-0857 (8th July)

GNC STR ITT 18/11/2010 01/03/2011updated kick-off date based on AIV/schedule optimisation


GNC CSSA RFQ 27/05/2011 07/10/2011updated kick-off date based on AIV/schedule optimisation


GNC RWS RFQ 27/04/2011 07/09/2011



� Exomars OMB / AER procurement DHSS and on-board

SWS/S Item Baseline approach ITT/RFQ Out KOM Comments

Data Handling SMU ITT 21/09/2010 17/12/2010updated kick-off date based on AIV/schedule optimisation


Data Handling PDHU ITT 08/12/2010 22/04/2011

Data Handling

OBSW

(OBSW

modules)

24/06/2011 02/11/2011

several modules of the OMB OBSW are proposed to be

subject to ITT (as per TAS-F proposal / 19th July 2010) -

need date is aligned with OBSW V2 development start OMB Thermal

control (OMB

Applicative SW implementing the thermal control law of

OMB units during the all the phaseEDM Thermal

control (EDM

applicative SW implementing the thermal control law of

EDM units during the Cruise phase

OMB EPS

management

(EPS ASW)

applicative SW controlling the PCDU heaters switches in

function of the main bus voltage and also taking over the

SA power management when necessary (MPPT clamping)

OMB Antenna

pointing

control (APM

Management of the HGA pointing mechanisms (HGA APM

ASW)UHF TTC

(Electra

transceiver

Managing of the RF equipments (power-on/off,

configuration, monitoring, ...)

PDHU

Management

(PDHU Mangt

applicative SW managing the PDHU (power on/off,

configuration, monitoring), download/upload of science

data to/from ground, communication with electra.Science

instruments

management

applicative SW setting the operating mode of each science

payload on each orbit, performing monitoring, context

storage, DH TM packets acquisitionEDM

management applicative SW in charge of setting the EDM units (CTPU,

RTPU) during the Cruise phase.

ITT



� Exomars OMB / AER procurement

approach Solar Array Assembly


SAStructural

PanelITT 22/11/2010 01/04/2011



SAPhoto Voltaïc

Assy (PVA)ITT 25/05/2011 04/10/2011



SA SADM ITT 18/02/2011 29/06/2011



� Exomars OMB / AER procurement

approach Telecom


Telecom X band RFDN ITT 01/02/2011 09/06/2011updated kick-off date based on AIV/schedule optimisation


Telecom X band LGA ITT 03/08/2011 09/12/2011updated kick-off date based on AIV/schedule optimisation


Telecom X band DST ITT 12/11/2010 01/04/2011updated kick-off date based on AIV/schedule optimisation


Telecom X band TWTA ITT 17/01/2011 26/05/2011

TelecomX band HGA

AssemblyITT 17/12/2010 06/05/2011



Telecom UHF RFDN ITT 08/02/2011 16/06/2011updated kick-off date based on AIV/schedule optimisation


Telecom UHF LGA ITT 31/05/2011 07/10/2011


Exomars OMB GSE / product tree

� Exomars OMB

/GSEs product tree


Exomars OMB EGSE / procurement approach

� Exomars OMB /EGSEs procurement

approach

item Baseline approach ITT/RFQ Out KOM Comments

EGSE CCS 02/05/2011 12/09/2011 CFI from TAS-I

EGSEX-band RF

SCOEITT 19/01/2011 30/05/2011

EGSERTS SCOE

(HW)ITT 02/05/2011 12/09/2011 ITT limited to HW

EGSEDH_GNC

SCOE (HW)ITT 02/05/2011 12/09/2011 ITT limited to HW

EGSE Power SCOE ITT 24/11/2010 06/04/2011

EGSETM/TC FEE

(HW)ITT 02/05/2011 12/09/2011 ITT limited to HW

EGSEPOWER FEE

(HW)ITT ITT limited to HW

EGSE STR EGSE as part of STR ITT

EGSE STR OGSE as part of STR ITT

EGSE IMU EGSE as part of SIMU ITT

EGSEUHF-band RF

SCOECFI from JPL


Exomars OMB SCC GSE / product tree

� Exomars OMB /SCC GSEs product

tree

OHB


Exomars OMB SCC GSE / procurement

� Exomars OMB /SCC GSEs procurement approach

SCC GSE

HGA

Deployment

device

as part of HGA ITT

SCC GSESCC Test

Clamp BandsOHB

note 1) this item is now procured by OHB due to the new

model philosophy (mechanical qualification at MTP level

on PFM)

SCC GSE

Simulant

liquid loading

device

OHB

SCC GSEPropellant

loading deviceOHB

SCC GSEX Band RF

SuitCaseITT 04/01/2013 16/05/2013 ITT limited to HW

SCC GSEInstrument I/F

Simulators02/05/2011 12/09/2011 CFI from JPL

SCC GSE

OMB

simulator

(need TBC)

MITT limited to HW. Note : need date and content to be

defined by TAS-I in OMB SOW

Exomars Orbiter Module Bus OMB - ESA

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