In this paper, global practical tracking is investigated via output feedback for a class of uncertain nonlinear systems subject to unknown dead-zone input. The nonlinear systems under consideration allow more general growth restriction, where the growth rate includes unknown constant and output polynomial function. Without the precise priori knowledge of dead-zone characteristic, an input-driven observer is designed by introducing a novel dynamic gain. Based on non-separation principle, a universal adaptive output feedback controller is proposed by combining dynamic high-gain scaling approach with backstepping method. The controller proposed guarantees that the closed-loop output can track any smooth and bounded reference signal by any small pre-given tracking error, while all closed-loop signals are globally bounded. Finally, simulation examples are given to illustrate the effectiveness of our dynamic output feedback control scheme.

在本文中，通过输出反馈来研究一类不确定非线性系统的全局实际跟踪，该不确定非线性系统受到未知死区输入的影响。所考虑的非线性系统允许更一般的增长限制，其中增长速度包括未知常数和输出多项式函数。在没有死区特性的先验知识的情况下，通过引入新颖的动态增益来设计输入驱动的观察器。基于非分离原理，提出了一种动态自适应高增益定标方法与反推方法相结合的通用自适应输出反馈控制器。所提出的控制器保证了闭环输出可以通过任何很小的预先给定的跟踪误差来跟踪任何平滑且有界的参考信号，而所有闭环信号都是全局有界的。最后，