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

Table 13

Error of natural frequencies identified by maximization kurtosis with gradient descent method.

Modal order	Real natural frequency (Hz)	Frequency identified (Hz)	Percentage of relative error
1	22.89	23	0.481%
2	91.55	—	—
3	205.99	207	0.490%
4	366.23	—	—
6	824	825	0.121%
7	1121.6	—	—