上海交通大学 航空航天学院,上海,200240
纸质出版:2019
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田海生, 龚德仁, 王楠, 段登平. 基于改进型离散Wirtinger型不等式的时变时滞系统稳定性分析[J]. 微电子学与计算机, 2019, 36(10): 21-26.
TIAN Hai-sheng, GONG De-ren, WANG Nan, et al. Stability analysis of time-varying delayed systems based on improved discrete wirtinger-based inequality[J]. 2019, 36(10): 21-26.
针对离散时变时滞系统的稳定性问题
采用改进型离散Wirtinger不等式方法进行研究
获得了一个保守性更低的稳定性判据.首先构造了一个新的辅助向量函数
利用正定矩阵的二次型都是正值的特性
提出了改进型Wirtinger不等式
获得了比传统的方法如离散Jensen不等式、离散Wirtinger不等式更好的求和逼近结果.在此基础上
构建了合适的Lyapunov-Krasovskii泛函
应用改进型离散Wirtinger不等式从而获得有更低保守性的稳定性判据
最终利用两个数值仿真完成验证.验证结果表明
利用新方法得到的时滞上界要大于现有的不等式方法
更接近理论值
从而表明了本文方法的有效性和优越性.
In view of the stability analysis of linear discrete systems
an intense research has been conducted by adopting an improved discrete Wirtinger-based inequality. A new stability criterion of linear discrete systems with interval time-varying delay is derived
which yields less conservative stability conditions. By definition of a novel auxiliary function
we propose a better integral inequality and receive a tighter stability condition as compared to the recently results such as discrete Jensen inequality
discrete Wirtinger-based inequality. Based on the new inequality
we construct a dedicated Lyapunov-Krasovskii functional and obtain a tighter estimation of the derivative of Lyapunov-Krasovskii functional in terms of the new inequality. Finally
two numerical examples are given to demonstrate the efficiency of our new methods.
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