Comparison of Different Independent Component Analysis Algorithms for Output-Only Modal Analysis

Figure 9

FFT of each independent component identified by maximum likelihood estimation with stochastic gradient descent method.

(a) FFT of the 1st independent component

(b) FFT of the 2nd independent component

(c) FFT of the 3rd independent component

(d) FFT of the 4th independent component

(e) FFT of the 5th independent component

(f) FFT of the 6th independent component