A relaxed quadratic function negative-determination lemma and its application to time-delay systems

A relaxed quadratic function negative-determination lemma and its application to time-delay systems
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松弛二次函数负定引理及其在时滞系统中的应用

DOI:
10.1016/j.automatica.2019.108764
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发表时间:
2020-03
期刊:
影响因子:
6.4
通讯作者:
Wu Min
Wu Min
中科院分区:
计算机科学2区
文献类型:
--
作者:
Zhang Chuan-Ke;Long Fei;He Yong;Yao Wei;Jiang Lin;Wu Min

文献摘要

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对于具有时变时滞的系统的分析,常常引入关于时变时滞的二次函数。为了确定这类函数的负定性,本文发展了一个基于参数可调的引理,它包含了文献中广泛使用的引理作为特例,并且在不需要额外的决策变量的情况下具有降低保守性的潜力。利用该引理建立了线性时滞系统的稳定性判据,并通过数值算例验证了该判据的优越性,最后将该判据应用于单区域电力系统负荷频率控制方案的稳定性分析。
The quadratic function with respect to the time-varying delay has often been introduced for the analysis of systems with time-varying delays. To determine the negative definiteness of such function, this paper develops a parameter-adjustable-based lemma, which contains the lemma popularly used in literature as a special case and has potential to reduce the conservatism without requiring extra decision variables. A stability criterion for a linear time-delay system is established by using the proposed lemma, whose advantage is demonstrated via a numerical example, and the criterion is finally applied to analyze the stability of load frequency control scheme for a single-area power system.
DOI: --
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