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NETWORKED CONTROL IN SPACE SYSTEMS - A BRIEF OVERVIEW Per Bodin, Swedish Space Corporation

NETWORKED CONTROL IN SPACE SYSTEMS - A BRIEF OVERVIEW Per Bodin, Swedish Space Corporation. Formation Flying Mission Types Research Activities Design Challenges Activities at SSC. Types of Spacecraft Formation Flying. Free-Space Formations Passive Formations Forced Motion

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NETWORKED CONTROL IN SPACE SYSTEMS - A BRIEF OVERVIEW Per Bodin, Swedish Space Corporation

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  1. NETWORKED CONTROL IN SPACE SYSTEMS - A BRIEF OVERVIEWPer Bodin, Swedish Space Corporation • Formation Flying Mission Types • Research Activities • Design Challenges • Activities at SSC

  2. Types of Spacecraft Formation Flying • Free-Space Formations • Passive Formations • Forced Motion • Rendezvous and Docking Missions

  3. Free-Space Formations • Far Away From Earth: Typically Lagrange Point • Astronomical or Physical Applications • Typical Application: Optical Interferometry • Missions: Darwin or Terrestrial Planet Finder • High Precision Optical Metrology

  4. Passive Formations GPS-based • Use Natural Orbit Properties • Loose Formations • Typical Application: Synthetic Aperture Radar • Safe Constellations baseline Interferometric SAR

  5. Forced Motion • Forced Flight in Earth Orbit • On Orbit Servicing, Inspection, Assembly • Typically: ISS circumflight • Based on Optical, Local RF, or GPS

  6. Rendezvous and Docking • Autonomous and Safe Detection, Approach, and Docking • ISS Transports • Mars Sample and Return Mission

  7. Research Activities • Architectures for Distributed Space Systems • High Precision Metrology • High Precision Micropropulsion • Control Strategies such as Model Predictive Control • Relative Dynamics • Testbeds

  8. Challenges in Developing Multi Spacecraft Systems • Safety • High level of functionality needed to maintain formation • Safe constellation with lost maneuvering capability • Collision Protection and Protection against evaporation • Safe Deployment of Formation • Software Development • Maintaining identical software for several platforms that may differ slightly • Generalization and Modularization of Control Software • Distributed Control and Distribution of Heavy Computations • Configuration Management for Several Spacecraft • Hardware • Procurement • Design • Manufacturing

  9. SSC Activities in Formation Flying • PRISMA • PROBA3 • SMART-OLEV

  10. PRISMA • Technology Demonstration • High Fidelity GPS Navigation • Vision Based Sensor Technology • RF Navigation • GNC Experiments • Passive Formations • Forced Motion • Autonomous Rendezvous • New Green Propulsion System • New Microthruster Technology • Swedish National Project • Launch in June 2009 • Participation from DLR (Germany), CNES (France), DTU (Denmark)

  11. PROBA3 • ESAs Formation Flying Initiative • Two Spacecraft • Coronograph Science Payload • High Elliptic Orbit • Early Development Phase • Secondary Objective • Demonstration of Multi Spacecraft Aspects such as Software Development and Architecture

  12. SMART-OLEV • Telecom Satellite Orbit Life Extension Vehicle • Will Extend Life of a Telecom Satellite Running Out of Fuel • Rendezvous and Docking in Geostationary Orbit • End of Construction Phase

  13. NETWORKED CONTROL IN SPACE SYSTEMS - A BRIEF OVERVIEWPer Bodin, Swedish Space Corporation

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