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Command-filter-based finite-time event-triggered adaptive output feedback control for nonlinear systems with state-function constraints. (English) Zbl 1530.93445

Summary: This paper investigates the finite-time (FT) adaptive output feedback control for a class of nonlinear systems with asymmetric state-function constraints and unknown external disturbances. Incorporating the asymmetric barrier Lyapunov function (BLF) into the backstepping technique, a new control approach is proposed to ensure that all states do not cross the constraint boundary. With the help of the command filter, the explosion of complexity induced by repeated differentiations of virtual controllers is eliminated, and the corresponding compensation system is used to offset the filter error. Meanwhile, the fuzzy logic system (FLS) and fuzzy state observer are employed to approximate unknown nonlinear functions and estimate unmeasurable states respectively. For effectively conserve communication resources, a novel adaptive event-triggered controller is proposed such that all signals of the closed-loop system are bounded, the tracking error converges to a small neighborhood containing the origin in finite time. Finally, the feasibility of the fabricated control scheme is verified with two examples.

MSC:

93D40 Finite-time stability
93C40 Adaptive control/observation systems
93B52 Feedback control
93C10 Nonlinear systems in control theory
93E11 Filtering in stochastic control theory
93C42 Fuzzy control/observation systems
Full Text: DOI

References:

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