PMID- 38057170 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20240222 IS - 1879-2022 (Electronic) IS - 0019-0578 (Linking) VI - 145 DP - 2024 Feb TI - Fixed-time command-filtered composite adaptive neural fault-tolerant control for strict-feedback nonlinear systems. PG - 87-103 LID - S0019-0578(23)00535-9 [pii] LID - 10.1016/j.isatra.2023.11.037 [doi] AB - The research investigates the fixed-time command-filtered composite adaptive neural fault-tolerant (FCCANF) control issue of strict-feedback nonlinear systems (SFNSs). There exist unknown functions and bounded disturbances in the considered systems. Radial basis function neural networks (RBFNNs) will be used in the estimate of the unknown functions. By the serial-parallel estimation models (SPEMs), the forecast biases and the track biases can change the weights of RBFNNs and the approximate characteristics of RBFNNs will be improved. Then, utilizing the novel fixed-time command filter and adaptive disturbance observers, the issue of complex explosion will be effectively solved and the external disturbance is effectively compensated. Subsequently, by utilizing the adaptive control technique, a novel FCCANF controller is developed. Additionally, we have that the system internal variables are bounded and the output variable inclines to a little interval around zero in fixed time which is not determined by the system initial variables. Eventually, numerical and practical examples are shown to prove the availability of the obtained control technique. CI - Copyright (c) 2023 ISA. Published by Elsevier Ltd. All rights reserved. FAU - Liu, Siwen AU - Liu S AD - The Navigation College, Dalian Maritime University, Dalian 116026, China. Electronic address: SiwenLiu0220@163.com. FAU - Wang, Huanqing AU - Wang H AD - The school of Mathematical Sciences, Bohai University, Jinzhou 121000, China. Electronic address: ndwhq@163.com. FAU - Li, Tieshan AU - Li T AD - The Navigation College, Dalian Maritime University, Dalian 116026, China; The school of Automation Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China; The Yangtze Delta Region Institute, University of Electronic Science and Technology of China, Huzhou, 313000, China. Electronic address: tieshanli@126.com. LA - eng PT - Journal Article DEP - 20231125 PL - United States TA - ISA Trans JT - ISA transactions JID - 0374750 SB - IM OTO - NOTNLM OT - Backstepping OT - Command filter OT - Disturbance observer OT - Fault-tolerant control OT - Fixed-time control COIS- Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. EDAT- 2023/12/07 00:42 MHDA- 2023/12/07 00:43 CRDT- 2023/12/06 21:58 PHST- 2022/11/13 00:00 [received] PHST- 2023/10/09 00:00 [revised] PHST- 2023/11/24 00:00 [accepted] PHST- 2023/12/07 00:43 [medline] PHST- 2023/12/07 00:42 [pubmed] PHST- 2023/12/06 21:58 [entrez] AID - S0019-0578(23)00535-9 [pii] AID - 10.1016/j.isatra.2023.11.037 [doi] PST - ppublish SO - ISA Trans. 2024 Feb;145:87-103. doi: 10.1016/j.isatra.2023.11.037. Epub 2023 Nov 25.