Linux in Space: Fault Detection, Recovery and Fault-Tolerant System Designs
summary
Linux4Space examines real CubeSat practice: Raspberry Pi and BeagleBone demo mission and a custom 10×10×10 cm Linux computer built from COTS parts. Redundancy ranges from two SD cards to duplicated flash with ECC, cross‑strapping and a supervisor switch; boot uses U‑Boot recovery flags and Yocto builds producing nominal and recovery images. A Visat satellite is orbiting 2.5 years with Linux payloads, thermal vacuum runs total ~1000 hours, radiation testing shows components survive ~2 years, and comms are as slow as 9.6 kbps (future 10 Mbps for ~20 min/day).
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chapters (18)
- 0:00Linux in space projects
- 3:09Linux in space challenges
- 6:05Fault tolerance fundamentals
- 9:17Redundancy and fail-safe design
- 13:11Software updates and boot reliability
- 16:41Real-world satellite Linux systems
- 18:46Linux computer for CubeSats
- 21:40Mission-level fault mitigation
- 22:47Avoiding single points of failure
- 26:23System-level fault mitigation
- 27:06Hardware testing for space reliability
- 28:10Thermal vacuum testing
- 31:07Simplicity in autonomous design
- 33:20Minimizing writes to NVM
- 34:02Yocto-based Linux build
- 35:07Boot procedure and recovery
- 37:38Yocto layers for space missions
- 38:42Q&A on speeds and costs
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