期刊
INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL
卷 31, 期 10, 页码 4917-4932出版社
WILEY
DOI: 10.1002/rnc.5511
关键词
backstepping method; full‐ state constraints; fuzzy control; pure‐ feedback systems
This paper proposes radical constraint functions and a control algorithm based on fuzzy control to address the constraints of uncertain nonlinear pure-feedback systems, while also avoiding assumptions and increasing algorithm applicability.
This paper studies the full-state and input constraints of uncertain nonlinear pure-feedback systems. The radical constraint functions are proposed, which avoids the drawbacks of the barrier Lyapunov functions and the logarithmic constraint functions. At the same time, a control algorithm based on fuzzy control is proposed to avoid the explosion of terms problem of the backstepping method. In addition, this paper avoids an Assumption of nonaffine function, which reduces the conservatism and increases the applicability of the algorithm. This control algorithm is proposed so that all signals of the closed-loop system are the semi-globally uniformly ultimately bounded, and the tracking error converge to a small neighborhood of the origin, and all states and input of nonlinear pure-feedback systems can be constrained. Finally, simulation results are provided to verify the effectiveness of the proposed approach.
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