Disturbance Observer Based Fixed-Time Control of Stochastic Systems
Information Security and Assurance (ISA)（2024）
Abstract
In this paper, the novel fixed -time anti -disturbance control scheme is proposed for a class of stochastic systems subjected to multiple disturbances and faults, and the disturbances consist of derivative -bounded disturbances and multiply noise. Based on the pole placement method, the fixed -time disturbance observer (Fixed -time DO) is devised to estimate derivative -bounded disturbances and an adaptive law is employed to approach the time -varying fault. Then a composite fixed -time controller is constructed to make the system converge to equilibrium position within a pre -specified time. At the same time, simulation examples illustrate that the proposed controller is effective and the convergence time is not related to the initial states of the system.
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Key words
Stochastic system,Fixed-time disturbance observer,Time-varying fault,Fixed-time control
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