This paper aims at validating the feasibility of an identification procedure, based on the use of the Hilbert
transform, by means of experimental tests for shear-type multi-degree-of-freedom systems. Particularly,
a three-degree-of-freedom frame will be studied either numerically or experimentally by means of
a laboratory scale model built at the laboratory of the Structural, Aerospace and Geotechnical Engineering
Department (DISAG) of University of Palermo. Several damage scenarios have been considered to prove
the effectiveness of the procedure. Moreover, the experimental tests have been conducted by considering
two different input loads: pulse forces, simulated by means of an instrumental hammer, and wide band
noise base inputs, by a shake table.
In the first section the damage identification procedure, proposed in recent works, is presented. The
procedure is based on the minimization of an objective function mathematically based on the properties of
the analytical signal and the Hilbert transform. Second section reports the experimental model geometrical
data and the data acquisition set-up as built in the DISAG laboratory. In Section 3, the results of the
experimental campaigns are presented and discussed having considered three damage scenarios. The
validated procedure has been proved to be able to not only detect damage even at early stage but it also needs
processing of only few samples of the structural respons