This article is devoted to the global practical tracking for a class of uncertain nonlinear systems. Notably, the input powers of the system are unknown and not required to be upper bounded by known constants. This means the presence of new type of serious uncertainties, which makes the problem under investigation largely challenging and urges us to develop a new powerful adaptive control scheme, particularly the compensation strategy to overcome the negative influence caused by the uncertainties. For this, a dual high‐gain‐based adaptive control design scheme is proposed, in which a dynamic high gain and a high gain function are jointly introduced to compensate the serious system uncertainties. Under the designed controller, all the signals of the resulting closed‐loop system are bounded and furthermore the tracking error remains any prescribed small after a finite time.

中文翻译：

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使用双高增益自适应反馈对输入功率未知的非线性系统进行全局实用跟踪

本文致力于一类不确定非线性系统的全局实际跟踪。值得注意的是，系统的输入功率是未知的，并且不需要以已知常数为上限。这意味着存在新型的严重不确定性，这使得所研究的问题具有很大的挑战性，并敦促我们开发一种新的强大的自适应控制方案，尤其是克服不确定性所带来的负面影响的补偿策略。为此，提出了一种基于双高增益的自适应控制设计方案，其中联合引入了动态高增益和高增益函数以补偿严重的系统不确定性。在设计好的控制器下