This paper studies the problem of global output feedback control for a class of feedforward nonlinear systems with the unknown output function and input matching uncertainty, whose nonlinearities satisfy the linear growth condition on unmeasured states multiplying the unknown constant, polynomial-of-output and polynomial-of-input growth rates, where the value range of the power of polynomial-of-output growth rate is increased compared with the existing results. Under the new transformation, based on the dynamic gain method and backstepping method, by constructing a new extended state observer with two dynamic gains, an output feedback controller can be designed to ensure that all the signals of the closed-loop system are bounded, the states of the original system and the corresponding observer converge to zero, and the estimate of input matching uncertainty converges to its actual value.

中文翻译：

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具有未知输出函数和输入匹配不确定性的前馈非线性系统的输出反馈控制

本文研究了一类具有未知输出函数和输入匹配不确定性的前馈非线性系统的全局输出反馈控制问题，其非线性满足在未测状态乘以未知常数、输出多项式和多项式的线性增长条件。投入增长率，其中与现有结果相比，产出增长率多项式的幂值范围增加。在新的变换下，基于动态增益法和反步法，通过构造一个具有两个动态增益的新的扩展状态观测器，可以设计一个输出反馈控制器，保证闭环系统的所有信号都是有界的，原始系统和相应观察者的状态收敛到零，