Feature Extraction of Double Pulse Metal Inert Gas Welding Based on Broadband Mode Decomposition and Locality Preserving Projection

Figure 3

The time-domain waveforms of x(n). (a) Mixed signal x(n). (b) Square component. (c) AM-FM sinusoidal component. (d) Noise component.

(a)

(b)

(c)

(d)