International Journal of Rotating Machinery / 2017 / Article / Tab 3

Research Article

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%1.48500.935117.03700.2176
Mean 15%1.51440.930617.10980.6459

ARX-nom. 10%0.07800.00500.09370.3668
Stand. dev. 15%0.10670.00660.20801.0023

ARX-opt. 10%1.47230.932916.38533.6159
Mean 15%1.48660.939016.37923.6518

ARX-opt. 10%0.05680.00420.26281.5461
Sta. Dev. 15%0.07820.00440.54843.1678

ARX-opt. 10%1.55830.931316.93560.3788
Mean 15%1.50690.934216.95600.2588

ARX-opt. 10%0.05450.00630.06730.3596
Stand. dev. 15%0.08140.00670.06870.2473

ARMAX- 10%26.2230.808311.983229.510
nom. Mean 15%93.0740.501524.536444.332

ARMAX- 10%34.2340.14838.917830.975
nom. Std. 15%108.290.502126.108137.97

ARMAX- 10%1.48470.936516.63652.1382
opt. Mean 15%1.43770.936416.40293.5123

ARMAX- 10%0.05730.00700.44852.1277
opt. Std. 15%0.09100.00710.39802.3409

ARMAX 10%1.51810.929717.00260.0153
opt Mean 15%1.50930.932016.95230.2806

ARMAX 10%0.08840.00670.08980.3178
opt. Std. 15%0.05550.00430.06710.2085