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SIF #2 - 7: Multi-Spacecraft Formation


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The first presentation from Sumeet Satpute's innovation project - multi-spacecraft formation, in collaboration with main supervisor professor Reza Emami and assistant supervisor Dr. Per Bodin at OHB, Sweden.

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SIF #2 - 7: Multi-Spacecraft Formation

  1. 1. Sumeet SatputeSumeet Satpute Onboard Space SystemsOnboard Space Systems Department of Computer Science, Electrical and Space EngineeringDepartment of Computer Science, Electrical and Space Engineering Luleå University of TechnologyLuleå University of Technology Multi-Spacecraft Formation Main SupervisorMain Supervisor Prof. Reza EmamiProf. Reza Emami Onboard Space SystemsOnboard Space Systems Luleå Uviversity of TechnologyLuleå Uviversity of Technology Assistant SupervisorAssistant Supervisor Dr. Per BodinDr. Per Bodin AOCS DepartmentAOCS Department OHB, SwedenOHB, Sweden May 10, 2016May 10, 2016
  2. 2. Introduction • What?  An autonomousautonomous formation system involving multiple spacecraft with an intelligentintelligent architecture • Why?  Payload requirements  Redundancy  Economical MMS
  3. 3. Research Focus • Autonomous Co-location of Geostationary satellites • Multi-Spacecraft Formation
  4. 4. Autonomous Co-location of Geostationary Satellites
  5. 5. Satellite Co-location • Sharing same longitudinal position with multiple geostationary satellites • Maximize the slot capacity • Affecting Factors  Number of participating satellites  Operational burden  Orbit determination accuracy  Station keeping period  Characteristics of the propulsion system  Separation distance
  6. 6. Separation techniquesLongitude separation Eccentricity separation Inclination separation Both eccentricity and inclination separation
  7. 7. Project Requirements • EightEight geostationary satellites • Orbit determination using onboard navigation systemonboard navigation system • DesignDesign station keeping maneuvers • Low thrust electric propulsionelectric propulsion • ReduceReduce separation distance • MinimizeMinimize the fuel consumption for each satellite
  8. 8. Multi-Spacecraft Formation • Distributed fault-tolerant control and guidance architectures • Multi-agent performance enhancement mechanisms • Optimal and robust reconfiguration
  9. 9. State of the Art • Rendezvous, docking and formation of two spacecraft • Separate controllers for orbital and attitude maneuvers • Static communication topology • Maintain acceptable performance under sensor, actuator or internal component faults PRISMA
  10. 10. • Design a multi-spacecraft formation architecturemulti-spacecraft formation architecture  Maintain inter-satellite formation  Fault tolerant capability  Maintain communication • Formation performance enhancement: concurrentconcurrent individual and social learningindividual and social learning • Formation Reconfigurability: Dynamic team formationDynamic team formation Research Direction
  11. 11. Probable Solution • Scalable hierarchical control  Executive LevelExecutive Level  Supervisor LevelSupervisor Level  Lower LevelLower Level  Task division, task accomplishment, dividing resources  Coordinating group of spacecraft  Physical level  Maintain spacecraft variables ExecutiveExecutive LevelLevel ExecutiveExecutive LevelLevel SupervisorSupervisor LevelLevel SupervisorSupervisor LevelLevel Low LevelLow LevelLow LevelLow Level SpacecraftSpacecraft Group Goal Group Goal Information Exchange Information Exchange Network Topology Network Topology Low level Control
  12. 12. Expected Research Outcome
  13. 13. • Autonomous co-locationAutonomous co-location with electrical propulsion and on-board navigation systems • IntelligentIntelligent control architecture • Address issues like fault tolerance, reliability,fault tolerance, reliability, adaptability and learningadaptability and learning. • Advancing the real-world applicabilityreal-world applicability of spacecraft formation
  14. 14. Application Research will contribute towards the vision of Fractionated Spacecraft Architecture: Responsive, Robust and IntelligentResponsive, Robust and Intelligent Space SystemsSpace Systems
  15. 15. Thank You