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ATV Rendezvous Mission 1: Jules Verne

ATV Rendezvous Mission 1: Jules Verne. Brian Rishikof Odyssey Space Research 281-488-7953 March 24, 2004. Outline. ATV (Automated Transfer Vehicle) Program ATV Vehicle ATV Trajectory and GN&C Demonstration. ATV Program. ESA (European Space Agency) ISS Partner

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ATV Rendezvous Mission 1: Jules Verne

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  1. ATV RendezvousMission 1: Jules Verne Brian Rishikof Odyssey Space Research 281-488-7953 March 24, 2004

  2. Outline • ATV (Automated Transfer Vehicle) Program • ATV Vehicle • ATV Trajectory and GN&C • Demonstration Odyssey Space Research

  3. ATV Program • ESA (European Space Agency) • ISS Partner • EADS (European Aeronautic Defence & Space) • Flight Segment Prime Contractor • CNES (Centre National D’Etudes Spatiales) • Operations Prime Contractor • RSC- E (Rocket and Space Corporation - Energia) • ESA Integration Sub-contractor • NASA (National Aeronautics & Space Administration) • Prime ISS Integrator • RASA (Russian Aviation and Space Agency) • Integrator Odyssey Space Research

  4. ATV International Korolev(Moscow) MCC-HHouston MCC-M Moscow ESTEC Noordwijk(Amsterdam) ATV-CC Toulouse Les Mureaux (Paris) Odyssey Space Research

  5. ITAR • International Traffic in Arms Regulations • ATV has been designated as a “defense article” • Subject to Export Control restrictions • Complicates support • Perils of International cooperation Odyssey Space Research

  6. ATV Mission • Dock to ISS Service Module aft • Deliver Cargo • Russian Water • Fuel • Gases • Other • ISS Propulsion • Reboost • Attitude control • Debris avoidance Odyssey Space Research

  7. MAY 2005 Jules Verne - Launch Date Odyssey Space Research

  8. Vehicle Configuration *400 km, 51.6 deg inclination Odyssey Space Research

  9. Vehicle Comparison Odyssey Space Research

  10. Vehicle Systems Odyssey Space Research

  11. Communication Odyssey Space Research

  12. Rendezvous Safety Rqmnts • “1 Fail Op” • “2 Fail Safe” • 24 hour safe free-drift trajectory • Approach Ellipsoid • 2 km x 2 km x 4 km • Keep Out Sphere (KOS) • 200 m sphere Odyssey Space Research

  13. Rendezvous Constraints • Russian Ground Station Visibility • ISS attitude and array feathering limits • ATV/ISS: Communication • ATV/ISS: Common GPS satellites and visibility • ISS: Power • ISS configuration dependent • Lighting for visual monitoring • Lighting for sensors • Power Odyssey Space Research

  14. Fixed Phasing Duration ~ 7.3 hours AI 3.5 km Variable Phasing Duration 49 - 97 hours Fixed Initial Drift ~ 3 hours KOS AE V-Bar S-S Comm S2 Phase 6 Phase 5 Phase 4 Phase 3 Phase 2 Phase 1 S-1/2 S1 R-Bar S0 dV6 0.5 rev >20 min >10 min S-1 S-2 dV4 dV5 S-3 dVMC12 MC  ATV-CC computes Mid-Course transfers dVMC11 and dVMC12 S-4  ATV-CC computes dV3 and dV4 S-3  ground computes dV5 and dV6 S-2  reference point; half orbit after dV6 S-1  point where 1st correction (trim) maneuver is initiated; 1 orbit after S-2 S-1/2  phasing targeted point; 1 orbit after S-1 dV3 S-4 dV2 dVMC11 MC dV1 CAM test 1 ATV Trajectory (1/2) Odyssey Space Research

  15. Omni-directional Space-to-Space Comm Range (~3km) Directional Space-to-Space Comm Range (~30km) 250 m KOS AE V-Bar AI 3.5 km S3 S2 40 min ~5 km Decision Point 45 min S0 S1 S-1/2 R-Bar S41 12m S4 20m >10 min >20 min S3 Start RGPS Navigation Transition to VDM Transition to VDM Relative Attitude Absolute GPS Navigation Crew Visual Assessment ATV Trajectory (2/2) Odyssey Space Research

  16. 2x GPS receivers/antennas AGPS RGPS 3x 2-axis accelerometers 4x 2-axis gyros KURS Range + range rate 2x Videometers Range (range rate) & LOS relative attitude 2x Telegoniometers Range (range rate) & LOS PRIME MONITORING SENSORS AGPS RGPS KURS TGM VDM VDM+ Rel Att USOS Cameras SM Camera DOCKING 10 cm 1 m 10 m 100 m 1 km 10 km 100 km ATV Navigation Odyssey Space Research

  17. S 4b S 41 S 4a V ATV Control • “Yaw Steering” • For power and communication • “Earth Pointing” • Early phasing • LVLH (0,0,0) • Pointing sensors at ISS • Relative Attitude • Measurements start at 30 m • Transition occurs at 20 m Odyssey Space Research

  18. ATV Control • Phasing • Earth Pointed OCS major maneuvers • Otherwise Yaw steering • Rendezvous • ACS maneuvers • Yaw steering attitude • Final Approach • Earth Pointed (LVLH 0,0,0) • Relative Attitude (0,0,0) • Simultaneous control of CG and docking probe tip Odyssey Space Research

  19. ATV Guidance Odyssey Space Research

  20. Safety • Tiered Approach • Ground and Crew as additional controls • Crew “in the loop” just prior to docking Coarse State Monitoring BACKUP FLIGHT Systems Trajectory Monitoring PRIMARY FLIGHT Systems System/Subsystem FDIR Odyssey Space Research

  21. ABORT ? Contingencies • ABORT (CAM) • Backup H/W & S/W • ESCAPE • Nominal H/W & S/W • Also, during Final Approach • HOLD • RETREAT • Vehicle/Crew/Ground commands ABORT Odyssey Space Research

  22. Decision Point • Distance at which momentum will overcome any propulsive reaction and result in contact • After this point, assumption is continuing is safer than executing “large” maneuver • “Decision” made by crew on-board ISS • ATV-CC communication lags result in earlier “ground” decision point Odyssey Space Research

  23. No “Piloting” Prescribed reactionon threshold detection by visual means Single operator with all “critical” information and command access Crew Monitoring • Visual target on ATV • Active illumination Camera on ISS • Prime • Backup (to be installed via EVA) Odyssey Space Research

  24. Safe! Show ATV is Demonstration Odyssey Space Research

  25. Demonstration Mission • Philosophy • Demonstrate safety critical elements that cannot be fully tested on ground • Demonstrate safety critical elements before they are relied upon during flight for safety Odyssey Space Research

  26. Demonstration Plan • Currently 3 day mission rendezvous mission • Progressively test and evaluate • Achieve incremental milestones • Demonstrate sensors as they come online (prime and monitoring) • Demonstrate communication and critical commanding • Demonstrate integrated vehicle GN&C performance • Demonstrate ALL contingency actions • After ALL demonstration objectives/criteria satisfied + Proceed to Docking attempt • Nominal rendezvous profile Odyssey Space Research

  27. ATV: For Fun! • http://esamultimedia.esa.int/docs/atv_model/ATV_2002_Intro.htm BUILD YOUR OWN! Odyssey Space Research

  28. Acknowledgments • Jean-François Clervoy/ESA • Douglas Yazell/Honeywell • AIAA Houston • NASA-JSC-EG • NASA ATV Team • Congratulationsto ATV Team Odyssey Space Research

  29. The End Odyssey Space Research

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