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

Figure 4

Modal shape comparison between FEA and separating vector by maximization kurtosis with gradient descent method.

(a) The 4th-order modal shape

(b) The 2nd-order modal shape

(c) The 7th-order modal shape

(d) The 6th-order modal shape

(e) The 1st-order modal shape

(f) The 3rd-order modal shape