Abstract
In this paper we give some necessary conditions to achieve noninteraction and stability via dynamic state-feedback for a wide class of nonlinear systems with block-partitioned outputs. Moreover, a class of regular dynamic state-feedback is defined and it is shown that the asymptotic stability of certain dynamics, together with the asymptotic stabilizability of certain system, is necessary to achieve noninteraction and stability via regular dynamic state-feedback. These two conditions, plus the asymptotic stabilizability of a suitable system, are shown to be also sufficient to solve the problem.
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