Wirtinger-based integral inequality: Application to time-delay systems

In the last decade, the Jensen inequality has been intensively used in the context of time-delay or sampled-data systems since it is an appropriate tool to derive tractable stability conditions expressed in terms of linear matrix inequalities (LMIs). However, it is also well-known that this inequali...

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Bibliographic Details
Published in:Automatica (Oxford) 2013-09, Vol.49 (9), p.2860-2866
Main Authors: Seuret, A., Gouaisbaut, F.
Format: Article
Language:English
Subjects:
Applied sciences
Automatic
Computer science
control theory
systems
Control system analysis
Control theory. Systems
Engineering Sciences
Exact sciences and technology
Fourier analysis
Gain
Inequalities
Integrals
Jensen inequality
Linear matrix inequalities
Sampled-data systems
Stability
Stability analysis
Time-delay systems
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Summary:In the last decade, the Jensen inequality has been intensively used in the context of time-delay or sampled-data systems since it is an appropriate tool to derive tractable stability conditions expressed in terms of linear matrix inequalities (LMIs). However, it is also well-known that this inequality introduces an undesirable conservatism in the stability conditions and looking at the literature, reducing this gap is a relevant issue and always an open problem. In this paper, we propose an alternative inequality based on the Fourier Theory, more precisely on the Wirtinger inequalities. It is shown that this resulting inequality encompasses the Jensen one and also leads to tractable LMI conditions. In order to illustrate the potential gain of employing this new inequality with respect to the Jensen one, two applications on time-delay and sampled-data stability analysis are provided.
ISSN:0005-1098
1873-2836
DOI:10.1016/j.automatica.2013.05.030