Stability and stabilization of fractional-order linear systems with convex polytopic uncertainties

Stability and stabilization of fractional-order linear systems with convex polytopic uncertainties
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具有凸多面体不确定性的分数阶线性系统的稳定性和稳定性

DOI:
10.2478/s13540-013-0010-2
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发表时间:
2012-12
影响因子:
3
通讯作者:
Jun Guo Lu, Yang Quan Chen
Jun Guo Lu, Yang Quan Chen
中科院分区:
数学3区
文献类型:
--
作者:
Jun Guo Lu, Yang Quan Chen

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本文考虑一类具有凸多面不确定性的分数阶线性时不变系统的鲁棒稳定性和镇定问题。通过引入新的矩阵变量,扩展了无不确定性的分数阶线性时不变系统的稳定性条件。新的扩展稳定性条件相对于新的矩阵变量是线性的,并且表现出正定矩阵和系统矩阵之间的一种解耦。基于新的扩展稳定性条件,利用参数相关的正定矩阵,从线性矩阵不等式的角度建立了上述鲁棒稳定性和稳定性问题的充分条件。最后,提供数值例子来说明所提出的结果。
This paper considers the problems of robust stability and stabilization for a class of fractional-order linear time-invariant systems with convex polytopic uncertainties. The stability condition of the fractional-order linear time-invariant systems without uncertainties is extended by introducing a new matrix variable. The new extended stability condition is linear with respect to the new matrix variable and exhibits a kind of decoupling between the positive definite matrix and the system matrix. Based on the new extended stability condition, sufficient conditions for the above robust stability and stabilization problems are established in terms of linear matrix inequalities by using parameter-dependent positive definite matrices. Finally, numerical examples are provided to illustrate the proposed results.
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