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

Table 7

Error of natural frequencies identified by minimum mutual information 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	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%