Abstract
In this paper, the output feedback stabilization problem is investigated for a class of low-order stochastic nonlinear time-delay systems with the lower-triangular form, where the powers of chained integrators are arbitrary real numbers between 0 and 1, and the multiple time-vary delays act on each system state. Because of the existence of low-order nonlinear terms, the system is not feedback linearizable and differentiable. Based on an extended adding a power integrator approach and a stability theory of stochastic continuous systems, an output feedback controller is systematically designed to ensure the global strong asymptotic stability of the closed-loop system. In the controller design, the negative effect of the multiple time-varying delays is counteracted by skillfully constructing a novel Lyapunov–Krasovskii functional, and the observer gains are determined by developing a recursive selection procedure. Finally, two numerical examples are provided to verify the effectiveness of the proposed method.
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Data availability
The data that support the findings of this study are available from the corresponding author, Jinping Jia, upon reasonable request.
Abbreviations
- LKF:
-
Lyapunov–Krasovskii functional
- SNTDS:
-
Stochastic nonlinear time-delay system
- HOS:
-
High-order system
- AAPI:
-
Adding a power integrator
- LOS:
-
Low-order systems
- GSS:
-
Global strong stability
- NGC:
-
Nonlinear growth condition
- SWP:
-
Standard Wiener process
- GSSP:
-
Globally strongly stable in probability
- GSASP:
-
Globally strongly asymptotically stable in probability
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Funding
This work is supported by the National Natural Science Foundation of China (Grant Nos. 62063031, 12101454), the College Teachers Innovation Foundation of Gansu Province of China (Grant No. 2023B-132), the Research Project of Tianshui Normal University (Grant No. TDJ2023-02) and the Foundation Project of Chongqing Normal University (Grant No. 23XLB013).
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Jia, J., Dai, H., Zhang, F. et al. Dynamic output feedback stabilization for a class of nonsmooth stochastic nonlinear systems perturbed by multiple time-varying delays. Nonlinear Dyn 112, 7093–7111 (2024). https://doi.org/10.1007/s11071-024-09377-2
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DOI: https://doi.org/10.1007/s11071-024-09377-2