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Stabilization of nonlinear systems using output feedback. (English) Zbl 0924.93038
Picci, Giorgio (ed.) et al., Dynamical systems, control, coding, computing vision. New trends, interfaces, and interplay. Basel: Birkhäuser. Prog. Syst. Control Theory. 25, 111-133 (1999).
The author presents two different approaches to the problem of output feedback stabilization for nonlinear systems. In the first part of the paper, a new proof of a method based on Teel-Praly’s nonlinear separation principle is given. The result applies to single-input single-output systems of the form $\begin{cases} \dot x=f(x)+ug(x)\\ y=h(x)\end{cases}$ where $$f,g,h$$ are continuous maps, and provides semi-global stabilization.
In the second part, the author considers nonlinear systems in normal form, and introduces a recursive procedure which provides robust semiglobal practical stabilization by output feedback. This approach is first illustrated in the case of linear systems.
For the entire collection see [Zbl 0911.00015].

##### MSC:
 93D15 Stabilization of systems by feedback 93C10 Nonlinear systems in control theory 93B52 Feedback control