Adaptive fuzzy output feedback backstepping control of pure-feedback nonlinear systems via dynamic surface control technique

作者：Tong Shaocheng^*; Li Yongming

来源：International Journal of Adaptive Control and Signal Processing, 2013, 27(7): 541-561.

DOI：10.1002/acs.2325

• nonlinear pure-feedback systems
• fuzzy logic systems
• fuzzy state observer
• adaptive backstepping control
• dynamic surface control

In this paper, an adaptive fuzzy backstepping dynamic surface control approach is considered for a class of uncertain pure-feedback nonlinear systems with immeasurable states. Fuzzy logic systems are first employed to approximate the unknown nonlinear functions, and then an adaptive fuzzy state observer is designed to estimate the immeasurable states. By the combination of the adaptive backstepping design with a dynamic surface control technique, an adaptive fuzzy output feedback backstepping control approach is developed. It is proven that all the signals of the resulting closed-loop system are semi-globally uniformly ultimately bounded, and the observer and tracking errors converge to a small neighborhood of the origin by choosing the design parameters appropriately. Simulation examples are provided to show the effectiveness of the proposed approach.

• 出版日期2013-7
• 单位辽宁工业大学