Nonparametric MIMO FRF matrix estimation using a single periodic broadband excitation

This paper presents a new method to estimate the FRF matrix of a MIMO linear time-invariant system using periodic broadband excitation. The main advantage of this method lies in the fact that a full MIMO FRF matrix can be estimated using only one experiment in contrast to other approaches that require at least as many experiments as there are inputs (Dedene et al., 2002; Guillaume et al., 1996; Pintelon and Schoukens, 2001). This yields a reduction of the experiment duration if the excitation signals are properly designed. Experimental validation of this new method on a multivariable test setup is presented