Application of System Identification for Modeling the Dynamic Behavior of Axial Flow Compressor Dynamics

Table 3

Simulation results with 10% and 15% noise standard deviation.

	Error sqr.	Correlat. coef.	Natural freq.	Nat. freq.; error
ARX-nom. 10%	1.4850	0.9351	17.0370	0.2176
Mean 15%	1.5144	0.9306	17.1098	0.6459
ARX-nom. 10%	0.0780	0.0050	0.0937	0.3668
Stand. dev. 15%	0.1067	0.0066	0.2080	1.0023
ARX-opt. 10%	1.4723	0.9329	16.3853	3.6159
Mean 15%	1.4866	0.9390	16.3792	3.6518
ARX-opt. 10%	0.0568	0.0042	0.2628	1.5461
Sta. Dev. 15%	0.0782	0.0044	0.5484	3.1678
ARX-opt. 10%	1.5583	0.9313	16.9356	0.3788
Mean 15%	1.5069	0.9342	16.9560	0.2588
ARX-opt. 10%	0.0545	0.0063	0.0673	0.3596
Stand. dev. 15%	0.0814	0.0067	0.0687	0.2473
ARMAX- 10%	26.223	0.8083	11.9832	29.510
nom. Mean 15%	93.074	0.5015	24.5364	44.332
ARMAX- 10%	34.234	0.1483	8.9178	30.975
nom. Std. 15%	108.29	0.5021	26.108	137.97
ARMAX- 10%	1.4847	0.9365	16.6365	2.1382
opt. Mean 15%	1.4377	0.9364	16.4029	3.5123
ARMAX- 10%	0.0573	0.0070	0.4485	2.1277
opt. Std. 15%	0.0910	0.0071	0.3980	2.3409
ARMAX 10%	1.5181	0.9297	17.0026	0.0153
opt Mean 15%	1.5093	0.9320	16.9523	0.2806
ARMAX 10%	0.0884	0.0067	0.0898	0.3178
opt. Std. 15%	0.0555	0.0043	0.0671	0.2085