Research Article
Application of System Identification for Modeling the Dynamic Behavior of Axial Flow Compressor Dynamics
Table 2
Simulation results with 1% and 5% noise std.
| ā | Error squared | Correl. coef.
| Natural freq.
| Natural freq. error |
| ARX-nom. 1% | 1.5154 | 0.9338 | 16.9958 | 0.0247 | Mean 5% | 1.5159 | 0.9311 | 17.0211 | 0.1241 |
| ARX-nom. 1% | 0.0456 | 0.0078 | 0.0126 | 0.0388 | Stand. dev. 5% | 0.0428 | 0.0057 | 0.0993 | 0.3552 |
| ARX-opt. 1% | 1.4606 | 0.9337 | 16.5024 | 2.9272 | Mean 5% | 1.4408 | 0.9383 | 16.5826 | 2.4553 |
| ARX-opt. 1% | 0.0633 | 0.0073 | 0.4595 | 2.7031 | Sta. Dev. 5% | 0.0544 | 0.0058 | 0.4590 | 2.3990 |
| ARX-opt 1% | 1.4837 | 0.9321 | 16.9763 | 0.1394 | Mean 5% | 1.4828 | 0.9317 | 16.9946 | 0.0317 |
| ARX-opt 1% | 0.0369 | 0.0086 | 0.0909 | 0.3359 | Stand. dev. 5% | 0.0494 | 0.0051 | 0.0561 | 0.1756 |
| ARMAX- 1% | 23.4750 | 0.9200 | 17.1773 | 1.0429 | nom. Mean 5% | 36.4212 | 0.7272 | 15.1183 | 11.069 |
| ARMAX- 1% | 24.6217 | 0.0721 | 4.4278 | 12.1042 | nom. Std. 5% | 66.8224 | 0.3197 | 9.6057 | 26.5340 |
| ARMAX- 1% | 1.4761 | 0.9359 | 16.4052 | 3.4997 | opt. Mean 5% | 1.4676 | 0.9364 | 16.5794 | 2.4741 |
| ARMAX- 1% | 0.0710 | 0.0070 | 0.4461 | 2.6227 | opt. Std. 5% | 0.0580 | 0.0054 | 0.3955 | 2.1698 |
| ARMAX- 1% | 1.5249 | 0.9343 | 16.9840 | 0.0941 | opt. Mean 5% | 1.4866 | 0.9317 | 17.0024 | 0.0141 |
| ARMAX- 1% | 0.0607 | 0.0054 | 0.0445 | 0.1716 | opt. Std. 5% | 0.0619 | 0.0045 | 0.0952 | 0.3731 |
|
|