ATV Rendezvous Mission 1: Jules Verne

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ATV RendezvousMission 1 Jules Verne

• Brian Rishikof
• Odyssey Space Research
• 281-488-7953
• March 24, 2004

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Outline

• ATV (Automated Transfer Vehicle) Program
• ATV Vehicle
• ATV Trajectory and GNC
• Demonstration

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ATV Program

• ESA (European Space Agency)
• ISS Partner
• EADS (European Aeronautic Defence Space)
• Flight Segment Prime Contractor
• CNES (Centre National DEtudes 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

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ATV International
Korolev(Moscow)
MCC-HHouston
MCC-M Moscow
ESTEC Noordwijk(Amsterdam)
ATV-CC Toulouse
Les Mureaux (Paris)
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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

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ATV Mission

• Dock to ISS Service Module aft
• Deliver Cargo
• Russian Water
• Fuel
• Gases
• Other
• ISS Propulsion
• Reboost
• Attitude control
• Debris avoidance

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Jules Verne - Launch Date
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Vehicle Configuration
400 km, 51.6 deg inclination
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Vehicle Comparison
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Vehicle Systems
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Communication
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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

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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

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ATV Trajectory (1/2)
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ATV Trajectory (2/2)
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ATV Navigation

• 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

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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

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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

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ATV Guidance
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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
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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
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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

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Crew Monitoring

• No Piloting
• Prescribed reactionon threshold detection by
  visual means
• Single operator with all critical information
  and command access

• Visual target on ATV
• Active illumination Camera on ISS
• Prime
• Backup (to be installed via EVA)

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Demonstration
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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

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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 GNC performance
• Demonstrate ALL contingency actions
• After ALL demonstration objectives/criteria
  satisfied Proceed to Docking attempt
• Nominal rendezvous profile

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ATV For Fun!
BUILD YOUR OWN!

• http//esamultimedia.esa.int/docs/atv_model/ATV_20
  02_Intro.htm

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Acknowledgments

• Jean-François Clervoy/ESA
• Douglas Yazell/Honeywell
• AIAA Houston
• NASA-JSC-EG
• NASA ATV Team
• Congratulationsto ATV Team

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The End