Description

The best way to do FMEA/FDIR might be see how other places did FMEA/FDIR. There should be research into this to discover the best way about doing it to get some in-house experience with this.

Tasks

• [ ] Find research papers on FMEA/FDIR
• [ ]

Notes

Diluxykaa - FDIR Notes

March 8, 2025

look into top level/second…definition (look from nasa) and FDIR/FMEA papers from other companies (kepler)

1. https://llis.nasa.gov/lesson/839

• fault-detection, fault-isolation, and recovery (FDIR) techniques in critical systems like space missions
• FDIR: detect faults quickly, isolate them accurately, and recover systems efficiently, reducing downtime and enhancing system reliability and operational success

Fault-Detection Techniques:

• Manual Detection: Can be done by human senses (e.g., if a light isn’t on despite being switched on).
• Built-In Test (BIT): Self-diagnostic tools to detect faults, varying from simple indicator lights to complex computer systems that generate test signals. BIT can be passive (monitoring) or active (testing with signals).
• Centralized vs. Decentralized BIT:
  • Centralized: One central unit monitors all system failures.
  • Decentralized: Each unit has its own detection system, which helps pinpoint specific issues.
• Voting Scheme: Uses redundant systems to cross-check data and identify failures based on majority voting (e.g., inertial measurement systems on the Orbiter).

Recovery Techniques: