Command filter-based event-triggered adaptive fixed-time output-feedback control for large-scale nonlinear systems

Yuanbo Su, Hong Xue, Yan Wang and Yingnan Pan

International Journal of Systems Science, 2021, vol. 52, issue 15, 3190-3205

Abstract: This paper studies the issue of event-triggered adaptive fixed-time control for uncertain large-scale nonlinear systems. A state observer is employed to estimate unknown states. By combining the technologies of command filter and backstepping control, a command filtered-based fixed-time adaptive control approach is proposed, which can cope with the issue of ‘complexity explosion’ in the backstepping design scheme. Meanwhile, a novel continuous hyperbolic tangent function is designed to handle the difficulty of fixed-time stability analysis with output-feedback control form, where two types of observer errors are needed in the designed Lyapunov function to achieve the fixed-time stability. Further, based on the event-triggered strategy, an event-triggered fixed-time adaptive controller is designed. Based on Lyapunov stability theory, it is proven that all signals of the closed-loop system are bounded. Finally, the effectiveness of the presented approach is validated by a simulation.

Date: 2021
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DOI: 10.1080/00207721.2021.1922953

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