Fixed-Time Adaptive Fuzzy Control for Uncertain Nonlinear Systems

作者：Lu, Kaixin; Liu, Zhi^*; Wang, Yaonan; Chen, C. L. Philip

来源：IEEE Transactions on Fuzzy Systems, 2021, 29(12): 3769-3781.

DOI：10.1109/TFUZZ.2020.3028458

• Nonlinear systems
• Adaptive systems
• Fuzzy control
• Asymptotic stability
• Uncertainty
• Switches
• Adaptive fuzzy control
• backstepping
• fixed time
• uncertain nonlinear systems

Most current methodologies on fixed-time adaptive fuzzy control for uncertain nonlinear systems result in practical fixed-time stability but not fixed-time stability, or require prior knowledge of the system dynamics. To obviate such restrictions, a fixed-time adaptive fuzzy control scheme is newly proposed with the discoveries of a singularity-avoidance virtual control design, a modified class of tuning functions, and a projection operator based adaptation mechanism. Fixed-time stability is established in the sense that the tracking error asymptotically converges to a user-defined interval within a prescribed fixed time. Illustrative examples verify the approaches developed.

• 单位
  广东工业大学