ChipSat Talk

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

Transcript

1. CENTIMETER-SCALE SPACECRAFT Zachary Manchester Space Systems Design Studio Cornell University (Currently at NASA Ames)
2. WHAT ARE WE TALKING ABOUT? 2
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
4. •  Where we’ve been •  What we’re working on now •  Where we’re heading CHIPSAT HARDWARE 4
5. WHERE WE’VE BEEN Solar Cells Microcontroller Radio Chip Antenna 3.8 cm Energy Storage Capacitor DC-DC Power Converter 5
10. WHAT WE’RE WORKING ON NOW… 10
11. WHAT WE’RE WORKING ON NOW… 11
12. That’s Us!
15. THE FUTURE… Solar Cells Radio Passive Components Microcontroller GPS Receiver Battery Dipole Antenna 15
16. •  Spacecraft scaling and dynamics •  Strength in numbers •  Mission concepts WHAT CAN WE DO WITH CHIPSATS? 16
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
18. CHIPSAT DYNAMICS 18
19. SOLAR SAILING 19
20. LORENTZ AUGMENTED ORBITS 20
21. PLASMA CHARGING EFFECTS 21 -100 V ~ 0V I+ e-
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
24. ATMOSPHERIC ENTRY 24
25. STRENGTH IN NUMBERS 25
26. PROBABILITY OF SUCCESS Series Components Probability of Success 26
27. A NEW PARADIGM Probability of Success Number of ChipSats 27
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
29. QUESTIONS? 29