标题：Global finite-time output-feedback stabilization for uncertain nonlinear systems with unknown growth rate
作者：Li Fengzhong; Liu Yungang
作者机构：[Li Fengzhong; Liu Yungang] Shandong Univ, Sch Control Sci & Engn, Jinan 250061, Peoples R China.
会议名称：35th Chinese Control Conference (CCC)
会议日期：JUL 27-29, 2016
来源：PROCEEDINGS OF THE 35TH CHINESE CONTROL CONFERENCE 2016
关键词：Uncertain nonlinear systems; global stabilization; finite-time; convergence; output-feedback; time-varying technique
摘要：This paper considers the global finite-time output-feedback stabilization for a class of uncertain nonlinear systems. Essentially different from the existing related literature, the systems in question allow serious parametric unknowns and serious time-variations coupling to the unmeasurable states, and possess remarkably inherent nonlinearities allowing to be low-order and high-order with respect to the unmeasurable states. By combining time-varying technique, homogeneous domination approach and certainty equivalence principle, a delicate time-varying output-feedback strategy is established to achieve the finite-time stabilization for the systems under investigation. It is shown that, as long as the involved time-varying gain is chosen fast enough to overtake the serious parametric unknowns and the serious time-variations, the output-feedback controller designed renders the closed-loop system states converge to zero in finite time.