A. Isidori, A tool for semiglobal stabilization of uncertain non-minimum-phase nonlinear systems via output feedback, IEEE AUTO C, 45(10), 2000, pp. 1817-1827
The purpose of this paper is to present a simple design method by means of
which it is possible to robustly stabilize, using output feedback, a signif
icant class of uncertain nonlinear systems whose zero dynamics are unstable
. The proposed procedure leads to the construction of a dynamic controller
yielding robust, semiglobal practical stability.