Feature Extraction and Information Condensation
Identify damage-sensitive features.
- Past experience
- Component and system testing
- Numerical analysis to simulate damage
Want many samples of low-dimension feature vectors.
The need for low-dimension feature vectors often necessitates some form of information condensation (e.g. compression of acceleration-time histories into modal properties).
Identify and quantify sources of feature variability.
Incorporate feedback from other portions of the process.