Output feedback robust stabilization for a class of nonlinear systems with input unmodeled dynamics
一类带不确定输入动态非线性系统的输出反馈鲁棒镇定

The problem of global robust stabilization via output feedback for a class of nonlinear systems with input unmodeled dynamics is considered.The improved high-gain observers with an additional parameter are introduced to design robust output feedback controllers,by which the gain can be determined without recursive procedure.Under the assumption that the unmodeled dynamics are minimum-phase and relative degree zero,a globally stabilizing output feedback controller is explicitly constructed based on nonseparation principle.