Ricerc@Sapienza

This letter addresses the problem of robust
output regulation of systems described by linear
differential-algebraic equations (DAEs). Taking advantage
of some recent relevant results concerned with the
development of normal forms for general DAEs, it is shown
how an internal model can be designed in such a way
that the problem in question is reduced to the problem
of robustly stabilizing an augmented system modeled by
DAEs. Then, a suitable enhancement—within the context
of systems modeled by DAEs—of the theory of extended
observers is proposed, by means of which such robust
stabilization problem is solved.