LFT uncertain model validation with time- and frequency-domain measurements

In this paper the authors study a model validation problem pertaining to li near fractional uncertainty models. They extend the previous validation app roaches, based upon either time or frequency measurements, to one using sim ultaneously time- and frequency-domain data. They show that this problem ca n be reduced to two independent convex feasibility tests, each of which cor responds to the time- or frequency-domain data alone, and each can be verif ied numerically using available algorithms and software programs. The merit of such a mixed time-and frequency-domain approach, therefore, lies in tha t not only can it accommodate the two distinctively different types of meas urement data simultaneously, but also from a computational standpoint it wi ll not suffer from a complexity growth beyond that associated with the exis ting time-domain tests.