Output feedback passification in nonlinear systems

In this paper basic concepts on the passivity, i. e. passivity, state feedback passivity and output feedback passivity, are reviewed. We propose sufficient conditions on static and dynamic output feedback passification. For static output feedback passification, the class of output feedback passive systems is extended with the help of a slightly modified storage function. Dynamic output feedback passification is achieved via observer based control and a supplementary input. Finally, asymptotic stabilization for a weak passive system is treated.