Szukana fraza: [Abstract = "The problem of smooth state feedback posture stabilization of the posture kinematic models of a class of restricted mobility robots is addressed. Three techniques are presented\: the first two methods \(output linearization and Lyapunov design\) ensure the posture stabilization with internal stability of the system while the third one \(time\-varying smooth state feedback\) ensures the stabilization of the full state."]