A novel hybrid scheme for fixed-time SOSM control of nonlinear uncertain systems subject to mismatched terms
作者：
Highlights：
• Firstly, we consider a new kind of SOSM systems in the presence of mismatched terms. The mismatched terms can be properly selected to reduce the input uncertainties.
• Secondly, different from these finite-time controllers, the design of a more difficult fixed-time SOSM controller whose settling time is free of the initial system values is considered in this paper.
• Finally, a novel hybrid scheme, that switches from a novel fixed-time attractive controller to a newly finite-time controller, is proposed. Lyapunov analysis shows that the system under the proposed controller is globally fixed-time stable.
摘要
•Firstly, we consider a new kind of SOSM systems in the presence of mismatched terms. The mismatched terms can be properly selected to reduce the input uncertainties.•Secondly, different from these finite-time controllers, the design of a more difficult fixed-time SOSM controller whose settling time is free of the initial system values is considered in this paper.•Finally, a novel hybrid scheme, that switches from a novel fixed-time attractive controller to a newly finite-time controller, is proposed. Lyapunov analysis shows that the system under the proposed controller is globally fixed-time stable.
论文关键词：Hybrid scheme,Sliding mode control,Second-order sliding mode,Fixed-time control,Mismatched term
论文评审过程：Received 2 February 2020, Revised 23 May 2020, Accepted 5 July 2020, Available online 17 July 2020, Version of Record 17 July 2020.
论文官网地址：https://doi.org/10.1016/j.amc.2020.125511
