Recursive Least-Squares Estimation for Hammerstein Nonlinear Systems with Nonuniform Sampling

Table 2

The parameter estimates and their errors (𝜎²=0.50²).

𝑘	𝛼1	𝛼2	𝛽1	𝛽2	𝛽3	𝛽4	𝛾1	𝛾2	𝛾3	δ (%)
100	−0.69605	0.48092	−0.59484	0.83269	−0.30638	0.59981	1.17677	0.54701	0.18587	13.23523
500	−0.68503	0.51969	−0.54542	0.81494	−0.30331	0.68632	1.05813	0.54706	0.22836	7.30117
1000	−0.65503	0.49678	−0.50768	0.79029	−0.26915	0.68531	1.01708	0.51876	0.25274	4.13831
2000	−0.64233	0.46233	−0.49229	0.74295	−0.25140	0.66911	1.00467	0.50079	0.25083	2.89926
3000	−0.64733	0.45069	−0.49445	0.72782	−0.25286	0.65764	1.01820	0.49893	0.24231	3.07166
4000	−0.65262	0.45294	−0.49564	0.72445	−0.25257	0.65608	1.00431	0.50179	0.25233	2.68214
5000	−0.66319	0.45510	−0.50654	0.72291	−0.25789	0.65842	0.99803	0.50215	0.25341	2.01651
6000	−0.66697	0.46155	−0.51409	0.72921	−0.25706	0.66243	0.99700	0.50881	0.25474	1.45453
True values	−0.68000	0.47241	−0.52674	0.73948	−0.25070	0.66221	1.00000	0.50000	0.25000