期刊
INFORMATION SCIENCES
卷 198, 期 -, 页码 130-146出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.ins.2012.02.050
关键词
Output feedback; Adaptive fuzzy control; Backlash-like hysteresis; Backstepping design; Stability analysis
资金
- National Natural Science Foundation of China [61074014, 51179019, 60874056]
- Outstanding Youth Funds of Liaoning Province [2005219001]
- Natural Science Foundation of Liaoning Province [20102012]
- China Postdoctoral Special Science Foundation [200902241]
In this paper, the problem of adaptive fuzzy output-feedback control is investigated for a class of uncertain nonlinear systems with unknown backlash-like hysteresis and unmeasured states. The fuzzy logic systems are used to approximate the nonlinear system 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 semi-globally uniformly ultimately bounded (SUUB), and both observer error and tracking error can converge to a small neighborhood of the origin. Two simulations are included to illustrate the effectiveness of the proposed approach. (C) 2012 Elsevier Inc. All rights reserved.
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