On-Board Computing for Structural Health Monitoring with Smart Wireless Sensors by Modal Identification Using Hilbert-Huang Transform

Figure 2

Numerical HHT algorithm evaluated from on-board computing and offline computing for the first frequency case.

(a) On-board original signal

(b) Offline original signal

(c) On-board band-pass filtered signal

(d) Offline band-pass filtered signal

(e) On-board IMF

(f) Offline IMF

(g) On-board phase unwrapping

(h) Offline phase unwrapping