Fixed-Time Stabilization of High-Order Uncertain Nonlinear Systems:Output Feedback Control Design and Settling Time Analysis  

作　　者：GUO Chaoqun HU Jiangping 

机构地区：[1]School of Automation Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China [2]Yangtze Delta Region Institute(Huzhou),University of Electronic Science and Technology of China,Huzhou 313001,China

出　　处：《Journal of Systems Science & Complexity》2023年第4期1351-1372,共22页系统科学与复杂性学报（英文版）

基　　金：This research was supported partially by the National Natural Science Foundation of China under Grant Nos.62103341,61473061 and 71503206;the Sichuan Science and Technology Program under Grant No.2020YFSY0012.

摘　　要：This paper is devoted to stabilizing the high-order uncertain nonlinear system in a fixed time by output feedback control.First,a novel settling time solution method is proposed by establishing an indirect double system and using the comparison principle.Then a fixed-time observer and a neural networked based adaptive law are constructed to estimate the state and the unknown disturbance for the high-order uncertain nonlinear system.Furthermore,a fixed-time output feedback controller is proposed via the homogeneity technique.The upper bound of the settling time is analyzed for the closed-loop system under the proposed output feedback control.Finally,simulation examples are given to illustrate the effectiveness of the theoretical results.

关 键 词：Fixed-time observer high-order uncertain system homogeneity approach output feedback control settling time 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]