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Subsystem State-Space Model Identification and Its Sensitivity to Test Variability

P. Kalling ; Thomas Abrahamsson (Institutionen för tillämpad mekanik, Dynamik) ; Tomas McKelvey (Institutionen för signaler och system, Signalbehandling)
Proceedings of the 2004 International Conference on Noise and Vibration Engineering, ISMA; Leuven; Belgium; 20 September 2004 through 22 September 2004 p. 2729-2743. (2004)
[Konferensbidrag, refereegranskat]

A method for identification of a subsystem state-space model is presented. Having available models for the complete coupled system and for the remaining subsystem, the unknown model can be extracted via linear matrix operations only. Hence, the method is computationally cheap. However, as the a priori known models most likely are contaminated with modelling and parametric errors visavis physical reality, a sensitivity analysis is performed. Analytical expressions for the identified model sensitivity to parameterized uncertainties in the known models are derived. General conclusions based on inspection of the analytical expressions are validated by numerical experiments.



Denna post skapades 2006-08-25. Senast ändrad 2016-06-21.
CPL Pubid: 15286