arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1802.09689math.OCcs.SYeess.SY
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自适应滑模控制无需了解不确定性边界

Adaptive sliding mode control without knowledge of uncertainty bounds

University of California, Berkeley(加州大学伯克利分校);Ford Motor Company(福特汽车公司)

Yi-Wen Liao, Selina Pan, Francesco Borrelli, J. Karl Hedrick

AI总结:

本文提出一种新的自适应方法,用于处理具有时变有界的非线性系统的控制输入。方法无需事先了解不确定性及其边界,通过自适应滑模结构调整增益,保证系统半全局稳定性,仿真显示可减小控制器增益并抑制抖振。

摘要:

本文提出了一种新的自适应方法,用于确定一类具有时变有界不确定性的非线性系统的控制输入。所提方法不需要任何关于不确定性的先验知识,包括其边界。主要思想是在自适应滑模控制结构下,通过更新律减小滑动面附近的增益并增加滑动面外的增益。通过李雅普诺夫理论保证闭环系统和适应误差的半全局稳定性。仿真结果表明,所提自适应方法能够将控制器增益的幅度减至可能的最小值并平滑抖振。

英文摘要:

This paper proposes a new adaptation methodology to find the control inputs for a class of nonlinear systems with time-varying bounded uncertainties. The proposed method does not require any prior knowledge of the uncertainties including their bounds. The main idea is developed under the structure of adaptive sliding mode control; an update law decreases the gain inside and increases the gain outside a vicinity of the sliding surface. The semi-global stability of the closed-loop system and the adaptation error are guaranteed by Lyapunov theory. The simulation results show that the proposed adaptation methodology can reduce the magnitude of the controller gain to the minimum possible value and smooth out the chattering.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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