Constrained Unscented Kalman Filter for Structural Identification of Bouc–Wen Hysteretic System

Table 3

Model parameters used in Example 3.

Parameter	True	Initial guess	Estimated		Absolute error
			UKF	CUKF	UKF	CUKF
(%)	2	—	—	—	—	—
(rad/s)	2	—	—	—	—	—
()	12	10	16.96	11.33	4.96	1.33
()	4	0.1	0.79	5.03	0.77	0.24
()	15	0.3	7.44	11.94	7.56	3.06
(—)	2	1	1.73	1.93	0.27	0.07
()	0.5	0	1.2	0.5	0.7	0
()	0.5	0	1.7	1.2	1.2	0.7

These parameters are presumed to be determined.