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New fixed-time sliding mode control for a mismatched second-order system
Transactions of the Institute of Measurement and Control ( IF 1.8 ) Pub Date : 2020-09-10 , DOI: 10.1177/0142331220952305
Guo Jianguo 1 , Yang Shengjiang 1
Affiliation  

A fixed-time sliding mode control (FTSMC) method is proposed for a second-order system with mismatched uncertainties in this paper. A new sliding mode, which is insensitive to the mismatched disturbance, is present to eliminate the effect of mismatched uncertainties by adopting the differentiable nonlinear function, and to obtain the fixed time stability independent of initial conditions by using the fraction-order function. In order to improve the performance of control system, the extended disturbance-observer-based fixed-time sliding mode control (EDO-FTSMC) approach is investigated to obtain the fixed-time stability subject to the mismatched uncertainties. Finally, the performance of the proposed control method is illustrated to compare other control approaches with numerical simulation results and application examples.

中文翻译:

失配二阶系统的新固定时间滑模控制

本文针对具有失配不确定性的二阶系统提出了一种固定时间滑模控制(FTSMC)方法。提出了一种新的对失配扰动不敏感的滑模,通过采用可微非线性函数消除失配不确定性的影响,并利用分数阶函数获得独立于初始条件的固定时间稳定性。为了提高控制系统的性能,研究了基于扩展干扰观测器的固定时间滑模控制(EDO-FTSMC)方法,以获得受失配不确定性影响的固定时间稳定性。最后,说明了所提出的控制方法的性能,以将其他控制方法与数值模拟结果和应用实例进行比较。
更新日期:2020-09-10
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