Adaptive Fuzzy Output Feedback Control for Switched Nonstrict-Feedback Nonlinear Systems With Input Nonlinearities

作者：Tong, Shaocheng^*; Li, Yongming; Sui, Shuai

来源：IEEE Transactions on Fuzzy Systems, 2016, 24(6): 1426-1440.

DOI：10.1109/TFUZZ.2016.2516587

• Fuzzy adaptive control
• fuzzy logic systems (FLS)
• switched nonstrict-feedback systems
• unknown dead zones

This paper studies adaptive fuzzy output feedback tracking control problem for nonstrict-feedback switched nonlinear systems. The switched systems under consideration contain unknown nonlinearities, unmeasured states, and unknown deadzones. Fuzzy logic systems are utilized to approximate the unknown nonlinearities, and a switched fuzzy state observer is designed, and thus, the immeasurable states are estimated via it. In the framework of observer-based output feedback control, and by using the certainty equivalence deadzone inverse, a novel adaptive fuzzy output feedback control design method with the parameters adaptation laws is developed. The stability of the closed-loop system and the convergence of the tracking error are proved based on Lyapunov function and the average dwell-time methods. Two simulation examples are provided to check the effectiveness of the proposed approach.

• 出版日期2016-12
• 单位辽宁工业大学