Adaptive fuzzy output feedback control of uncertain nonlinear systems with unknown backlash-like hysteresis

作者：Li, Yongming; Tong, Shaocheng^*; Li, Tieshan

来源：Information Sciences, 2012, 198: 130-146.

DOI：10.1016/j.ins.2012.02.050

• Output feedback
• Adaptive fuzzy control
• Backlash-like hysteresis
• Backstepping design
• Stability analysis

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.

• 出版日期2012-9-1
• 单位大连海事大学; 辽宁工业大学