1 / 44

Space Systems

Space Systems. Bob Hall & John Carrico. Agenda. Background Examples How AGI technology is applied to space When AGI technology is applied to space. Background. STK, ODTK, NTK: “Tool Kit” Many small tools that used together can model large complex systems Models of how things move

aziza
Download Presentation

Space Systems

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Space Systems Bob Hall & John Carrico

  2. Agenda • Background • Examples • How AGI technology is applied to space • When AGI technology is applied to space

  3. Background • STK, ODTK, NTK: “Tool Kit” • Many small tools that used together can model large complex systems • Models of how things move • Models of moving payloads on moving things • Sensors • Antennas • Models of how these moving things interact

  4. Background… • Space Applications • Defense • Air Force and other DoD • UK MOD • French Air Force • Civil • NASA • ESA • CNES • DLR • JAXA • NSPO • Commercial and Contractors • Digital Globe, Space Imaging, OrbImage, Sirius, XM • Boeing, Lockheed Martin, Northrop Grumman, Orbital Sciences • Qinetiq, SSTL • EADS Astrium • RSC Energia

  5. Examples • 1 spacecraft • 2 spacecraft • Many spacecraft

  6. Imaging satellite • When can I take a picture of a target? • Constraints • Lighting • Terrain

  7. Jammed Beam Communications • When can I communicate with my satellite? • Constraints • Signal-to-noise; Bit error rate • Terrain • Interference and jamming

  8. Attitude • Model attitude control laws • Sensors • Actuators

  9. Solar power • Calculate power based on solar array geometry relative to Sun

  10. Sensor obscuration • Parts of spacecraft block sensor field-of-view

  11. Ground-track control • Repeating-ground-track Sun-synchronous frozen- orbit

  12. Transfer to geostationary • Normal transfer • Sensor constraints • Where to put sensors • Sun sensor • Maneuvers • Launch window • Delta-V vs Sun angle

  13. Transfer to geostationary… • AsiaSat3 rescue • Low-thrust

  14. Geostationary • Orbit • Communications • Multi-beam and shaped patterns

  15. Lunar transfer

  16. Lunar landing • Landing site selection • Communications • Lighting • Terrain • Soft landing • Closed loop control

  17. Libration point • Sun-Earth/Moon • Gravity assist

  18. Libration point… • Earth-Moon • Communications relay • Station/depot • Transfer

  19. Libration point… • Any set of bodies

  20. Interplanetary • Communications, coverage, attitude, orbits, maneuvers work around other planets • Aerobraking • Make your own asteroids

  21. Multiple hop communications • Chains

  22. ODTK • Tracking spacecraft and calculating the orbit • Operations • Automation • Notification

  23. Error Analysis • Tracking schedule to meet requirements • With STK • What types of tracking do I need • Is it worth it to add additional hardware? • What if we miss a pass?

  24. ODTK… • Maneuver detection • Maneuver and OD • Maneuver calibration

  25. Rendezvous • Rendezvous: often used to describe getting a spacecraft from one orbit to a control box near but offset from another • Rendezvous from 6678 km sma orbit to 6838 km sma orbit • 4 maneuvers used to execute 2 Hohmann transfers • Proximity Operations: Begins after rendezvous • Very near another spacecraft (e.g., < 1 km) • Docking: Controlling spacecraft to touch at desired velocity

  26. Docking • Closed loop control • Fuzzy logic controller used for multiple constraints

  27. Proximity Operations • Moving one spacecraft around and close to another • Multiple way-points and collection stay-times

  28. Formation flying • Formation design • Communications • Science and sensor collection

  29. Coordinated mission Sensors Communications Constellation design Relative station keeping Constellations

  30. Space and other objects • Interaction with missiles, ground, sea, and air • Same capabilities work communications, navigation, sensor collection

  31. Close approach • Conjunction analysis • Launch windows • Laser clearinghouse

  32. Coverage • Single object • Area • Constraints • Interference • Terrain • Attitude • Works on the Moon and Mars

  33. GPS • NTK • Ground • Aircraft • Spacecraft

  34. Scheduling Timeslots Tasks Scheduled Activity Resources Resource Availability

  35. STK/Analyzer • Parametric analysis • Monte Carlo • Runs STK for you

  36. How technology is applied • Desktop • Automated desktop • Matlab, • Excel • Real-time situational awareness • Server on a network • Embedded system

  37. Desktop • Interactive • From quick trade-off studies to high-fidelity analysis • Reports and graphs

  38. Automated desktop • Use, Matlab, Excel, or other programs to run software for you

  39. Real-time situational awareness • Telemetry monitoring • Other feeds • Flight Control

  40. Live server on a network • LAN • HTML • Web Services

  41. Pre-computed data Ground tracks Sensor footprints Data served on a network

  42. Embedded system • STKx • 4DX

  43. When technology is applied • Proposals • Early analysis • System design • Pre-launch analysis • Operations • Payload support • Contingency operations • Post-mission

  44. Summary • Many tools used in different ways applied to many situations • Many examples of AGI Technology applied to space – more to come • Designed for complete life-cycle

More Related