Rotorcraft system identification: an integrated time-frequency domain approach

The problem of rotorcraft system identification is considered and a novel, two step technique is proposed, which combines the advantages of time domain and frequency domain methods. In the first step, the identification of a black-box model using a subspacemodel identificationmethod is carried out, using a techniquewhich can deal with data generated under feedback; subsequently, in the second step, a- priori information on the model structure is enforced in the identified model using an Hinf model matchingmethod. A simulation study is used to illustrate the proposed approach.