LMI-Based Lower Bound Analysis of the Best Achievable H∞ Performance for SISO Systems
LMI-Based Lower Bound Analysis of the Best Achievable H∞ Performance for SISO Systems
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基于 LMI 的 SISO 系统最佳可实现 H∞ 性能下界分析
DOI:
10.9746/jcmsi.9.165
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
T. Hagiwara
中科院分区:
文献类型:
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作者:
Y. Ebihara;Keisuke Matsuo;T. Hagiwara
In this paper, we study H∞ performance limitation analysis for continuous-time SISO systems using LMIs. By starting from an LMI that characterizes a necessary and sufficient condition for the existence of desired controllers achieving a prescribed H∞ performance level, we represent lower bounds of the best H∞ performance achievable by any LTI controller in terms of the unstable zeros and the unstable poles of a given plant. The transfer functions to be investigated include the sensitivity function (1 + PK)−1, the complementary sensitivity function (1 + PK)−1PK, and (1 + PK)−1P, the first and the second of which are well investigated in the literature. As a main result, we derive lower bounds of the best achievable H∞ performance with respect to (1 + PK)−1P assuming that the plant has unstable zeros. More precisely, we characterize a lower bound in closed-form by means of the first non-zero coefficient of the Taylor expansion of the plant P(s) around its unstable zero.
DOI:
10.1109/tac.2003.815013
发表时间:
2003-08
期刊:
IEEE Trans. Autom. Control.
影响因子:
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作者:
T. Iwasaki;S. Hara;H. Yamauchi
通讯作者:
T. Iwasaki;S. Hara;H. Yamauchi
DOI:
10.1109/tac.2003.815012
发表时间:
2003-08
期刊:
IEEE Trans. Autom. Control.
影响因子:
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作者:
Jie Chen;S. Hara;Gang Chen
通讯作者:
Jie Chen;S. Hara;Gang Chen