Adaptive Fuzzy Output Feedback Dynamic Surface Control of Interconnected Nonlinear Pure-Feedback Systems

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

来源：IEEE Transactions on Cybernetics, 2015, 45(1): 138-149.

DOI：10.1109/TCYB.2014.2333738

• Backstepping design
• dynamic surface control
• fuzzy decentralized control
• fuzzy state observer
• interconnected nonlinear pure-feedback systems
• stability analysis

In this paper, an adaptive fuzzy decentralized output feedback control design is presented for a class of interconnected nonlinear pure-feedback systems. The considered nonlinear systems contain unknown nonlinear uncertainties and the states are not necessary to be measured directly. Fuzzy logic systems are employed to approximate the unknown nonlinear functions, and then a fuzzy state observer is designed and the estimations of the immeasurable state variables are obtained. Based on the adaptive backstepping dynamic surface control design technique, an adaptive fuzzy decentralized output feedback control scheme is developed. It is proved that all the variables of the resulting closed-loop system are semi-globally uniformly ultimately bounded, and also that the observer and tracking errors are guaranteed to converge to a small neighborhood of the origin. Some simulation results and comparisons with the existing results are provided to illustrate the effectiveness and merits of the proposed approach.

• 出版日期2015-1
• 单位辽宁工业大学; 大连海事大学