Adaptive-observer-based consensus tracking with fault-tolerant network connectivity of uncertain time-delay nonlinear multiagent systems with actuator and communication faults. (February 2023)

• Record Type: Journal Article
• Authors: Yoo, Sung Jin
• Is Part Of: ISA transactions. Volume 133(2023)
• Page Start: 317
• Page End: 327
• Publication Date: 2023-02
• Subjects: Fault-tolerant network connectivity -- Preselected-time performance tracking -- Output feedback -- Time-delay nonlinear multiagent systems; Engineering instruments -- Periodicals; Engineering instruments; Periodicals; Electronic journals; 629.805
• DOI: 10.1016/j.isatra.2022.07.015
• Languages: English
• ISSNs: 0019-0578

Abstract

Abstract: In this study, a distributed output-feedback design approach for ensuring fault-tolerant initial network connectivity and preselected-time consensus tracking performance is proposed for a class of uncertain time-delay nonlinear multiagent systems (TDNMSs) with unexpected actuator and communication faults. It is assumed that time-varying state delays and system nonlinearities in TDNMSs are unknown. The main contribution of this study is to provide a delay-independent output-feedback control strategy to address a fault-tolerant initial connectivity preservation problem in the consensus tracking field. A local delay-independent adaptive state observer using neural networks is designed for each follower, and the boundedness of local observation errors is proved by constructing a Lyapunov–Krasovskii functional and adaptive tuning laws. Then, the local nonlinear relative output errors using a time-varying function with a preselected convergence time are derived to design simple local delay-independent trackers. The stability of the proposed consensus tracking system is analyzed, and simulation comparison results demonstrate the validity of the proposed strategy. Highlights: A memoryless output-feedback design for fault-tolerant connectivity-preserving tracking is investigated. The memoryless local adaptive state observer for each follower is constructed. The guaranteed-performance-based consensus and fault-tolerant connectivity are proved.