Mixed Time/Frequency domain identification for linear systems
DEI - 3B Room
November 23rd, 2010
In the system identification community typically two mainstream can be recognized: on one side the input-output data used for identification were sampled values of time domain system response; on the other, input-output data were described in the frequency domain as transfer function or spectrum points. Even identification methods, although relying on the same basic concepts, divided in these two mainstreams differentiating in algorithms and procedures to handle these different kind of data. In the engineering practice several situations occur in which both data types are collected: for instance in the identification of rotor crafts dynamics. In order to perform identification exploiting the information carried by both kinds of signals, in recent years methods to transform data in the favored domain have been proposed. In this work a joint time/frequency domain identification method is studied, that allows to handle both data types in their own natural domain, taking advantage of the traditional techniques of system identification.