Exomars Orbiter Module Bus OMB TAS-F 23rd Sept 2010 Exomars Industrial day- Turin 1
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 2
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 3
Exomars OMB Product tree Exomars OMB product tree: OMB E 111 TAS-F OHB OMB AER system E 1111 OMB MTP system E 1112 GSE K Power E 11111 GNC Telecom E 11113 E 11114 PCDU RCU Battery Harness assy E 111111 E 111112 E 111113 STR CSS IMU RWA Solar Array E 11112 Structural Panel E 111121 Mechanisms E 111122 Photo Voltaic Assy E 111123 SADM E 111124 E 111131 E 111132 E 111133 E 111134 Data Handling E 11115 SMU OBSW PDHU E 111151 E 111152 E 111153 X-Band E 111141 UHF E 111142 HGA-Assy LGAs X-DST TWTA RFDN E 1111411 E 1111412 E 1111414 E 1111415 E 1111416 *CFE UHF Transceiver* UHF RFDN E 1111421 E 1111422 UHF Antenna E 1111423 4
Exomars OMB MTP/ product tree Exomars OMB / MTP product tree (See OHB presentation) OMB E 111 TAS-F OHB OMB system E 1111 OMB MTP system E 1112 GSE K Structure assy E 11121 Propulsion E 11124 Central Tube E 111211 Structure panels Brackets E 111212 E 111213 PCA PIA Tanks E 111241 E 111242 E 111243 Thermal Control E 11123 Engines and thrusters E 111244 Active elements Passive elements E 111231 E 111232 5
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 MATMOS SOIR NOMAD EMCS HISCI MAGIE PL 1553 bus UHF LVDS data link transceivers PF 1553 bus SBDL data LGA 1 LGA 2 link Rx UHF antennas Tx Science Payloads HGA TWTA X-DST RFDN TWTA X-DST LGA 3 APM Discrete links Main Engine 424N 12 * 10 N thrusters Orbiter module bus : 2x1553 bus EDM Demonstrator PDHU Interface with EDM Spacewire or Packetwire SMU SA PCDU SADM SADM Batteries Latch P PPPPP Pressure valves P PPP transducers Solar Arrays TCS Star Trackers CSS EDM Reaction Wheels power line Gyroscopes RCS IF 6 Pyros to RCS, SA and HGA deployment Heater Heater
Exomars OMB Mission phases ESA-NASA 2016 mission timeline 2016 2017 2018 2019 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Transfer Wait in 4 SOL Orbit 2016 Mission Aerobraking Orbiter in circular orbit Launch 2016 Lander EDL Mars orbit insertion 4 sol Elliptic Release 4 sol TGMI Science from circular orbit 2018 Rovers Landing TGMI Science & Rovers data relay Global Dust Storm Season Superior Conjunction Global Dust Storm Season Lander data relay Science observations 7 science & Rovers datarelay
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 Start of aerobraking phase End of aerobraking phase 8
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 POWER Battery ITT 18/02/2011 29/06/2011 POWER Harness Assembly ITT 03/03/2011 12/07/2011 GNC IMU RFQ 17/11/2010 01/03/2011 GNC STR ITT 18/11/2010 01/03/2011 GNC CSSA RFQ 27/05/2011 07/10/2011 GNC RWS RFQ 27/04/2011 07/09/2011 / ITT converted in RFQ / Release date planned on 15/09/2010 Closing date to be changed to 29/10/2010. 9
Exomars OMB AER / ITT-RFQ approach Exomars OMB / AER procurement DHSS and on-board S/SSW Item Baseline approach ITT/RFQ Out KOM Comments Data Handling SMU ITT 21/09/2010 17/12/2010 Data Handling PDHU ITT 08/12/2010 22/04/2011 Data Handling OBSW (OBSW modules) OMB Thermal control (OMB EDM Thermal control (EDM OMB EPS management (EPS ASW) OMB Antenna pointing control UHF TTC (APM (Electra transceiver PDHU Management (PDHU Mangt Science instruments management EDM management ITT 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 Applicative SW implementing the thermal control law of OMB units during the all the phase applicative SW implementing the thermal control law of EDM units during the Cruise phase 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) Management of the HGA pointing mechanisms (HGA APM ASW) Managing of the RF equipments (power-on/off, configuration, monitoring,...) applicative SW managing the PDHU (power on/off, configuration, monitoring), download/upload of science data to/from ground, communication with electra. applicative SW setting the operating mode of each science payload on each orbit, performing monitoring, context storage, DH TM packets acquisition applicative SW in charge of setting the EDM units (CTPU, RTPU) during the Cruise phase. 10
Exomars OMB AER / ITT-RFQ approach Exomars OMB / AER procurement approach Solar Array Assembly S/S Item Baseline approach ITT/RFQ Out KOM Comments SA Structural Panel ITT 22/11/2010 01/04/2011 SA Photo Voltaïc Assy (PVA) ITT 25/05/2011 04/10/2011 SA SADM ITT 18/02/2011 29/06/2011 11
Exomars OMB AER / ITT-RFQ approach Exomars OMB / AER procurement approach Telecom S/S Item Baseline approach ITT/RFQ Out KOM Comments Telecom X band RFDN ITT 01/02/2011 09/06/2011 Telecom X band LGA ITT 03/08/2011 09/12/2011 Telecom X band DST ITT 12/11/2010 01/04/2011 Telecom X band TWTA ITT 17/01/2011 26/05/2011 Telecom X band HGA Assembly ITT 17/12/2010 06/05/2011 Telecom UHF RFDN ITT 08/02/2011 16/06/2011 Telecom UHF LGA ITT 31/05/2011 07/10/2011 12
Exomars OMB GSE / product tree Exomars OMB /GSEs product tree 13
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 EGSE X-band RF SCOE ITT 19/01/2011 30/05/2011 EGSE RTS SCOE (HW) ITT 02/05/2011 12/09/2011 ITT limited to HW EGSE DH_GNC SCOE (HW) ITT 02/05/2011 12/09/2011 ITT limited to HW EGSE Power SCOE ITT 24/11/2010 06/04/2011 EGSE TM/TC FEE (HW) ITT 02/05/2011 12/09/2011 ITT limited to HW EGSE POWER 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 EGSE UHF-band RF SCOE CFI from JPL 14
Exomars OMB SCC GSE / product tree Exomars OMB /SCC GSEs product tree OHB 15
Exomars OMB SCC GSE / procurement Exomars OMB /SCC GSEs procurement approach SCC GSE HGA Deployment device as part of HGA ITT SCC GSE SCC Test Clamp Bands OHB 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 GSE Propellant loading device OHB SCC GSE X Band RF SuitCase ITT 04/01/2013 16/05/2013 ITT limited to HW SCC GSE Instrument I/F Simulators 02/05/2011 12/09/2011 CFI from JPL SCC GSE OMB simulator (need TBC) M ITT limited to HW. Note : need date and content to be defined by TAS-I in OMB SOW 16