Shock and Vibration / 2019 / Article / Tab 4

Research Article

An Introduction of a Robust OMA Method: CoS-SSI and Its Performance Evaluation through the Simulation and a Case Study

Table 4

CoS-SSI results.

Mode 1Mode 2Mode 3
(Hz)Error ()Error () (Hz)Error ()Error () (Hz)Error ()Error ()

Theoretical value7.0119Null1.12%Null19.6468Null3.15%Null28.3904Null4.55%Null

SNR = 10S17.02750.22%2.17%93.75%19.33241.60%4.45%41.27%28.51830.45%6.53%43.52%
S27.011801.97%75.89%19.33771.57%5.91%87.62%28.57810.66%6.71%47.47%
S37.04050.41%5.17%361.61%19.33221.6%3.92%24.44%28.50760.41%5.83%28.13%

SNR = 0.5S17.01700.07%3.47%209.82%19.59470.27%5.14%63.17%28.42880.14%6.53%43.52%
S27.02340.16%2.58%130.36%19.59350.27%3.74%18.73%28.51250.43%3.50%23.08%
S37.02200.14%4.45%297.32%19.58870.30%3.51%11.43%28.47360.29%5.53%21.54%