Adaptive feedback control for nonlinear triangular systems subject to uncertain asymmetric dead-zone input  

作　　者：Minghui Feng Yanjie Chang Zhiyu Duan Xianfu Zhang 

机构地区：[1]School of Control Science and Engineering,Shandong University,Jinan,250061,Shandong,China

出　　处：《Control Theory and Technology》2023年第4期530-540,共11页控制理论与技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.61973189,62073190);the Research Fund for the Taishan Scholar Project of Shandong Province of China(No.ts20190905);the Natural Science Foundation of Shandong Province of China(No.ZR2020ZD25).

摘　　要：In this paper,an adaptive control strategy is proposed to investigate the issue of uncertain dead-zone input for nonlinear triangular systems with unknown nonlinearities.The considered system has no precise priori knowledge about the dead-zone feature and growth rate of nonlinearity.Firstly,a dynamic gain is introduced to deal with the unknown growth rate,and the dead-zone characteristic is processed by the adaptive estimation approach without constructing the dead-zone inverse.Then,by virtue of hyperbolic functions and sign functions,a new adaptive state feedback controller is proposed to guarantee the global boundedness of all signals in the closed-loop system.Moreover,the uncertain dead-zone input problem for nonlinear upper-triangular systems is solved by the similar control strategy.Finally,two simulation examples are given to verify the effectiveness of the control scheme.

关 键 词：Dead-zone input Dynamic gain Adaptive estimation Global boundedness 

分 类 号：O17[理学—数学]