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

Table 15

Error of natural frequencies identified by maximization negentropy with quasi-Newton iteration method with measurement noise.

Modal order	Real natural frequency (Hz)	Frequency identified (Hz)	Percentage of relative error
1	22.89	—	—
2	91.55	92	0.492%
3	205.99	207	0.490%
4	366.23	367	0.210%
6	824	825	0.121%
7	1121.6	1122	0.036%