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.
| ā | 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 |
|
|