Delay-dependent state feedback stabilization for a networked control model with two additive input delays

Delay-dependent state feedback stabilization for a networked control model with two additive input delays
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具有两个附加输入延迟的网络控制模型的延迟相关状态反馈稳定性

DOI:
10.1016/j.amc.2015.05.114
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发表时间:
2015-08
影响因子:
4
通讯作者:
Zhengqiang Zhang
Zhengqiang Zhang
中科院分区:
数学2区
文献类型:
--
作者:
Hanyong Shao;Zhengqiang Zhang

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本文的重点是具有两个附加输入延迟的网络控制模型的延迟相关状态反馈稳定性。首先研究延迟相关的稳定性。通过根据延迟将整个延迟区间分割为子区间,构造李亚普诺夫泛函。为了减少保守性,我们以两种方式处理李雅普诺夫泛函。更具体地说,我们将李雅普诺夫泛函作为一个整体来考察它的正定,而不是像通常那样将它的每一项限制为正定。此外,在估计李亚普诺夫函数的导数时,我们通过为不同的子区间引入不同的松弛变量来设法获得相当严格的上限。由此产生的稳定性结果分别取决于两个延迟,并且比一些现有的结果保守。然后,根据稳定性结果对状态反馈稳定性进行了研究。为控制器制定了与延迟相关的条件,使得闭环系统渐近稳定。最后通过算例说明了稳定结果的保守性较小以及所提稳定方法的有效性。
This paper is centered on delay-dependent state feedback stabilization for a networked control model with two additive input delays. Firstly delay-dependent stability is investigated. By splitting the whole delay interval into subintervals according to the delays, a Lyapunov functional is constructed. To reduce conservatism we handle the Lyapunov functional in two ways. More specifically, we take the Lyapunov functional as a whole to examine its positive definite, rather than restrict each term of it to positive definite as usual. In addition, when estimating the derivative of the Lyapunov functional, we manage to get a fairly tighter upper bound by introducing different slack variables for the different subintervals. The resulting stability results turn out dependent on the two delays separately, and less conservative than some existing ones. Then, based on the stability results state feedback stabilization is studied. Delay-dependent conditions are formulated for the controller such that the closed-loop system is asymptotically stable. Finally examples are given to show the less conservatism of the stability results and the effectiveness of the proposed stabilization method.
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