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

Table 5

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

AR parameter		The coefficient of polynomial base function
	−5.917		0.591	0.859	0.259	0.049	−0.030
	14.648		2.493	1.075	1.155	1.086	0.714
	−19.417		−9.857	−4.254	−4.470	−3.609	−2.805
	14.535		10.635	4.915	4.673	4.482	4.141
	−5.826		−3.112	−1.687	−1.333	−1.905	−2.071
	0.977