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Adaptive neural network fixed-time control for an uncertain robot with input nonlinearity
Kong, Linghuan1; Ouyang, Yuncheng2; Liu, Zhijie3
2024-03
Source PublicationInternational Journal of Robust and Nonlinear Control
ISSN1049-8923
Volume34Issue:5Pages:3033-3056
Abstract

The article introduces an innovative adaptive fixed-time control strategy designed for a robot system grappling with challenges like actuator saturation and model uncertainty. Two strategies are explored: model-based control and neural networks control. In instances of model uncertainty, neural networks are leveraged to contend with the unknown dynamics of the robot system. These networks undergo training to approximate the elusive model parameters. Through this neural network approach, we establish adaptive laws grounded in fixed-time convergence, ensuring that system tracking errors converge to a confined range near zero within a predetermined time frame. To tackle the issue of actuator saturation, an enhanced auxiliary system is introduced. This auxiliary system is tailored to counterbalance the adverse impacts of actuator saturation, thereby augmenting the tracking performance of the robot system. The proposed control policy is rigorously analyzed using Lyapunov theory, demonstrating that the system's tracking errors converge within a fixed time frame. To validate the efficacy of the proposed methodology, both numerical simulations and practical experiments are conducted, affirming the effectiveness of the approach.

KeywordAdaptive Neural Networks Fixed-time Control Input Saturation Robotic System
DOI10.1002/rnc.7122
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaAutomation & Control Systems ; Engineering ; Mathematics
WOS SubjectAutomation & Control Systems ; Engineering, Electrical & Electronic ; Mathematics, Applied
WOS IDWOS:001110438600001
PublisherWILEY, 111 RIVER ST, HOBOKEN 07030-5774, NJ
Scopus ID2-s2.0-85178218332
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Document TypeJournal article
CollectionFaculty of Science and Technology
DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
Corresponding AuthorOuyang, Yuncheng
Affiliation1.Department of Electrical and Computer Engineering, Faculty of Science and Technology, University of Macau, Macao
2.The Engineering Research Center of Autonomous Unmanned System Technology, Ministry of Education, and Anhui Provincial Engineering Research Center for Unmanned System and Intelligent Technology, Anhui University, Hefei, China
3.School of Intelligence Science and Technology, University of Science and Technology Beijing, Beijing, China
First Author AffilicationFaculty of Science and Technology
Recommended Citation
GB/T 7714
Kong, Linghuan,Ouyang, Yuncheng,Liu, Zhijie. Adaptive neural network fixed-time control for an uncertain robot with input nonlinearity[J]. International Journal of Robust and Nonlinear Control, 2024, 34(5), 3033-3056.
APA Kong, Linghuan., Ouyang, Yuncheng., & Liu, Zhijie (2024). Adaptive neural network fixed-time control for an uncertain robot with input nonlinearity. International Journal of Robust and Nonlinear Control, 34(5), 3033-3056.
MLA Kong, Linghuan,et al."Adaptive neural network fixed-time control for an uncertain robot with input nonlinearity".International Journal of Robust and Nonlinear Control 34.5(2024):3033-3056.
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