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一种新的约束变速趋近律离散滑模控制方法

DOI: 10.3724/SP.J.1004.2013.01552, PP. 1552-1557

Keywords: 趋近律,无抖振,离散,滑模控制,约束

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Abstract:

?考虑惯性执行器输出速度有限的实际,引入趋近律变化速率的控制函数,设计了一种新的无抖振离散滑模变速趋近律算法.首次提出了通过设计趋近律变化速率来构造离散滑模趋近律的思想,使得控制器的物理意义更加明显,设计更加灵活和简单.对于标称系统,该算法可以使切换函数在有限时间内快速无抖振地收敛至零;对于满足匹配条件的不确定系统,切换函数能够收敛至与不确定性及控制参数相关的某一数值,通过设置控制参数,可使这一数值任意小.

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