Relationships between asymptotic stability and exponential stability of positive delay systems

Relationships between asymptotic stability and exponential stability of positive delay systems
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正时滞系统渐近稳定性与指数稳定性的关系

DOI:
10.1080/03081079.2012.737324
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发表时间:
2013-02
影响因子:
2
通讯作者:
James Lam
James Lam
中科院分区:
计算机科学3区
文献类型:
--
作者:
Xingwen Liu;James Lam

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研究了连续时间和离散时间正时滞系统的渐近稳定性与指数稳定性之间的关系。一个系统被称为正的,如果它的状态和输出是非负的,只要初始条件和输入是非负的。得到两个结果。首先,如果一个正系统对所有有界(进一步连续,对于连续时间系统)时变时滞是渐近稳定的,那么它对所有这样的时滞是指数稳定的。特别地,如果一个正系统对于给定的常时滞是渐近稳定的,那么它对于所有常时滞都是指数稳定的。其次,如果所涉及的时滞是无界的,那么正系统可能不是指数稳定的,即使它是渐近稳定的。
This paper explores the relations between asymptotic stability and exponential stability of continuous-time and discrete-time positive systems with delay. A system is said to be positive if its state and output are non-negative whenever the initial condition and input are non-negative. Two results are obtained. First, if a positive system is asymptotically stable for all bounded (further continuous, for continuous-time systems) time-varying delays, then it is exponentially stable for all such delays. In particular, if a positive system is asymptotically stable for a given constant delay, then it is exponentially stable for all constant delays. Second, if the involved delays are unbounded, then the positive system may be not exponentially stable even if it is asymptotically stable.
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