Abstract
This paper is devoted to solving the global fixed-time event-triggered stabilization problem for a class of nonstrict-feedback stochastic systems with full state constraints. Firstly, the nonlinear state constrained system is converted into a novel constrained free system with the help of nonlinear map**s, which eliminates the feasibility conditions of virtual control signals while satisfying the state constraints. Secondly, a lemma about the variable separation technique is put forward to deal with unknown nonlinear terms in stochastic systems, which avoids the restrictive growth assumption that unknown functions need to be satisfied. Then, a fixed-time event-triggered control strategy based on the symbol function technique is designed by combining the backstep** method with the fixed-time stability theory of stochastic systems. It is proved that all closed-loop signals are globally fixed-time stable in probability. Finally, a numerical example and a single-link robot system are simulated to verify the availability and feasibility of the developed approach.
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Funding
This work was supported in part by the NSFC under Grants 62221004, 62073166; the Postgraduate Research & Practice Innovation Program of Jiangsu Province under Grant KYCX22_0444; the Key Laboratory of Jiangsu Province; the Shandong Provincial Natural Science Foundation under Grant ZR2021ZD13; and the Project on the Technological Leading Talent Teams Led by Frontiers Science Center for Complex Equipment System Dynamics (FSCCESD220401).
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Qi, X., Xu, S., Li, Y. et al. Global fixed-time event-triggered control for stochastic nonlinear systems with full state constraints. Nonlinear Dyn 111, 7403–7415 (2023). https://doi.org/10.1007/s11071-023-08263-7
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DOI: https://doi.org/10.1007/s11071-023-08263-7