Structural Stiffness Identification Based on the Extended Kalman Filter Research

Table 2

Structural stiffness identification results.

Stiffness	Noise level
	No noise	Error level %	SNR = 40	Error level %	SNR = 30	Error level %
𝐾1	12000	0	12118	0.98	11459	−4.51
𝐾2	11000	0	10904	−0.87	11491	4.46
𝐾3	10000	0	10039	0.39	9628	−3.72
𝐾4	9000	0	8991	−0.10	9038	0.42