Cristian Flutur

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Given a generalized system whose transfer matrix function may be improper or may be polynomial, we provide necessary and sufficient conditions under which a minimal factorization does exist. The conditions are formulated in terms of deflating subspaces of pencils related to a special type of realisation, called centered, which allows to efficiently cater(More)
Solutions of the output regulation problem in a nonlinear setting invariably target systems presented under some “normal form”. This paper reviews a recently introduced such form for MIMO nonlinear systems and discusses consequent necessary conditions for solving the MIMO nonlinear output regulation problem. As opposed to the (by now classic)(More)
The problem of simultaneously squaring down and cancelling a specified part of the zeros of a completely general linear system by an invertible transformation is investigated from different standpoints. Various classes of solutions featuring minimal McMillan degree, unitary or J-inner symmetry, either with respect to the imaginary axis or the unit circle(More)
In aceasta lucrare este prezentată problema reglarii ieşirii dacă se consideră sisteme neliniare MIMO. In acest context formele normale pentru reprezentarea sistemelor neliniare sunt de mare interes. Două forme normale pentru sisteme neliniare MIMO sunt prezentate. Prima releva vectorul de grade relative si poate fi aplicată pentru sisteme pătrate(More)
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