An Extended Time Series Algorithm for Modal Identification from Nonstationary Ambient Response Data Only

Table 4

The results of initial estimation for the AR parameters and the coefficients of polynomial base function from the nonstationary response data through the three-stage least-square method (, , ).

AR parameter		The coefficient of polynomial base function
	−5.946		0.653	1.122	0.712	0.355	0.173
	14.790		2.705	−0.751	−0.847	0.492	−0.271
	−19.697		−10.108	3.982	3.532	−1.762	0.981
	14.815		10.482	−6.499	−4.345	2.678	−2.100
	−5.966		−2.871	3.336	1.576	−1.392	1.373
	1.005