Fixed-Time Fuzzy Control for a Class of Nonlinear Systems

作者：Sun, Yumei; Wang, Fang^*; Liu, Zhi; Zhang, Yun; Chen, C. L. Philip

来源：IEEE Transactions on Cybernetics, 2022, 52(5): 3880-3887.

DOI：10.1109/TCYB.2020.3018695

• Nonlinear systems
• Stability criteria
• Fuzzy control
• Adaptive systems
• Control systems
• Upper bound
• Adaptive fuzzy control
• backstepping
• fixed-time control
• nonlinear systems

Fixed-time tracking control is considered for a class of nonlinear systems in this article. Different from the conventional literature on fixed-time control studies, in this article, the nonlinearities of systems are all completely unknown. Fuzzy-logic systems are utilized to model these unknown nonlinearities. To deal with the fixed-time control under the approximation errors, three steps are taken. First, a new criterion of fixed-time stability is developed; second, a new fixed-time control scheme is proposed, which is different from the existing adaptive design method; and third, to analyze the fixed-time stability of the system, two novel inequalities are established. It shows that the proposed fuzzy control scheme can guarantee system performance in a fixed time, and the upper bound of the settling time only depends on the design parameters.

• 单位
  广东工业大学