A study of some approaches to vibration data analysis [Elektronisk resurs] / Tomas Abrahamsson, Tomas McKelvey, Lennart Ljung

• Using data from extensive vibrational tests of the new aircraft Saab 2000 three different methods for vibration analysis are studied. These methods are ERA (eigensystem realization algorithm), N4SID (a subspace method) and PEM (prediction error approach). We find that both the ERA and N4SID methods give good initial model parameter estimates that can be further improved by the use of PEM. We also find that all methods give good insights into the vibrational modes. 

Indexterm och SAB-rubrik

System identification Model analysis State-space methods Application