Ricerc@Sapienza

Thispaperaddressestheproblemofrobustlystabilisingaclassoflineardifferential-algebraic systems char-
acterised by autonomous and asymptotically stable zero dynamics, in spite of parameter uncertainties
ranging over apriori fixed bounded sets. We exploit recent results related to the structural properties and
normal forms of this class of systems and propose a robust control that asymptotically recovers, in practical
terms, the performance of a nominal, though non-implementable, stabilising control. The proposed con-

This study presents a robust defence strategy in reaction to destabilising cyber-physical attacks launched against linear time invariant systems and its application to power systems. The proposed protection scheme aims at making the dynamics of a selected subsystem decoupled from the dynamics of the subsystem targeted by the attack. The standard decoupling methods are made robust, in spite of poor information about plant parameters and lack of state measurement, with the aid of an extended observer.