Driss Mehdi

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— This paper considers robust stability analysis for a matrix affected by LFT-based complex uncertainty (LFT for linear fractional transformation). A method is proposed to compute a bound on the amount of uncertainty ensuring robust root-clustering in a combination (intersection and/or union) of several possibly nonsymmetric half planes, discs, and(More)
—This note comes back to the hard problem of pole placement by static output feedback: let a triplet of matrices ; ; be given with state variables, inputs and ouputs, find a matrix such that the spectrum of + equals a specified set. When + , a simple noniterative technique based upon the notion of eigenstructure that, in most cases, assigns + roots is(More)
This paper investigates the stabilizability of a class of linear periodic discrete-time systems for which the state vector complies with a positivity constraint. LMI-based conditions for the existence of a desired periodic state feedback controller guaranteeing the resultant closed-loop system is asymptoti-cally stable and positive are presented. The(More)