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Adaptive fuzzy output-feedback control for output constrained nonlinear systems in the presence of input saturation.
- Source :
-
Fuzzy Sets & Systems . Aug2014, Vol. 248, p138-155. 18p. - Publication Year :
- 2014
-
Abstract
- Abstract: In this paper, the problem of adaptive fuzzy output-feedback control is investigated for a class of output constrained uncertain nonlinear systems with input saturation and unmeasured states. To address output constraint and input constraint, a barrier Lyapunov function and an auxiliary design system are employed, respectively. Fuzzy logic systems are utilized to approximate the unknown nonlinear functions, and a fuzzy state observer is designed to estimate the unmeasured states. By utilizing the fuzzy state observer, and combining the adaptive backstepping technique with adaptive fuzzy control design, an observer-based adaptive fuzzy output-feedback control approach is developed. It is proved that the proposed control approach can guarantee that all the signals in the closed-loop system are bounded, and the input and output constraints are circumvented simultaneously. A numerical example is provided to illustrate the effectiveness of the proposed approach. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 01650114
- Volume :
- 248
- Database :
- Academic Search Index
- Journal :
- Fuzzy Sets & Systems
- Publication Type :
- Academic Journal
- Accession number :
- 96186287
- Full Text :
- https://doi.org/10.1016/j.fss.2013.11.006