ChipSat Talk

ChipSat Talk

This is a talk I gave as part of the Earth science seminar series at NASA Ames

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Zac Manchester

October 25, 2012
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Transcript

  1. 3.

    WHAT ARE WE TALKING ABOUT? 3 Printed Circuit Board 3.8

    cm x 3.8 cm x 3mm A = 14.4 cm2 m = 8 gm A/m = 1.8 cm2/gm Depackaged Components on Silicon 1.7 cm x 1.7 cm x 350 µm A = 2.89 cm2 m = 220 mg A/m = 13.1 cm2/gm System on Chip 1.0 cm x 1.0 cm x 25µm A = 1.0 cm2 m = 7.5 mg A/m = 133 cm2/gm
  2. 4.

    •  Where we’ve been •  What we’re working on now

    •  Where we’re heading CHIPSAT HARDWARE 4
  3. 5.

    WHERE WE’VE BEEN Solar Cells Microcontroller Radio Chip Antenna 3.8

    cm Energy Storage Capacitor DC-DC Power Converter 5
  4. 6.

    6

  5. 7.

    7

  6. 8.

    8

  7. 9.

    9

  8. 13.
  9. 14.
  10. 16.

    •  Spacecraft scaling and dynamics •  Strength in numbers • 

    Mission concepts WHAT CAN WE DO WITH CHIPSATS? 16
  11. 17.

    SPACECRAFT SCALING 17 Symbol Meaning AD Aerodynamic Drag EC Eddy

    Current Drag GG Gravity Gradient GR General Relativity LZ Lorentz Force M Magnetism MT Magnetism - Torquer MR Magnetism – Residual Field Moon Lunar Gravity OB Earth Oblateness PA Planetary Albedo PC Particle Collisions PL Solar System Planetary Gravity PR Poynting-Robertson Drag SP Solar Pressure SR Special Relativity SW Solar Wind Sun Solar Gravity g Characteristic Length
  12. 22.

    22

  13. 23.

    ATMOSPHERIC DRAG 23 8 cm! Aluminized CP-1! UHF center-fed dipole!

    1 x 1 x 0.01 cm satellite-on-chip! ~ adrag = A m 1 2 Cd⇢v2ˆ v
  14. 28.

    •  Don’t think about individual ChipSats •  Manage the statistics

    of the cloud •  Use little or no closed-loop control •  Take advantage of environmental effects HOW DO WE PLAN MISSIONS? f(qi, ˙ qi, t) @f @t + @f @qi ˙ qi + @f @ ˙ qi ¨ qi = 0 28