Online Modal Identification of Concrete Dams Using the Subspace Tracking-Based Method

Table 1

A comparison of the ARE of time-varying modal identification results for frequencies using the EIV-PAST-RSSI and GYAST-RSSI methods.

Case	Mode	Method	No noise (%)	SNR = 50 dB (%)	SNR = 40 dB (%)	SNR = 30 dB (%)
I	1	EIV-PAST-RSSI	0.25	0.41	0.63	0.88
		GYAST-RSSI	0.23	0.44	0.51	0.75
	2	EIV-PAST-RSSI	0.32	0.64	1.58	2.05
		GYAST-RSSI	0.29	0.60	1.47	2.11
	3	EIV-PAST-RSSI	0.30	0.83	1.02	1.37
		GYAST-RSSI	0.36	0.80	0.97	1.22
	4	EIV-PAST-RSSI	0.42	0.77	1.29	1.58
		GYAST-RSSI	0.58	0.69	1.36	1.77
II	1	EIV-PAST-RSSI	0.11	0.20	0.59	0.92
		GYAST-RSSI	0.21	0.34	0.48	0.85
	2	EIV-PAST-RSSI	0.32	0.41	0.68	1.09
		GYAST-RSSI	0.47	0.59	0.50	1.32
	3	EIV-PAST-RSSI	0.79	0.86	1.25	1.73
		GYAST-RSSI	0.79	0.86	1.25	1.73
	4	EIV-PAST-RSSI	0.54	0.99	1.43	1.92
		GYAST-RSSI	0.48	0.87	1.51	1.77