Distributed Robustness Analysis of Interconnected Uncertain Systems Using Chordal Decomposition

Sina Khoshfetrat Pakazad; Anders Hansson; Martin Skovgaard Andersen; Anders Rantzer

doi:10.3182/20140824-6-ZA-1003.01649

Distributed Robustness Analysis of Interconnected Uncertain Systems Using Chordal Decomposition

Sina Khoshfetrat Pakazad, Anders Hansson, Martin Skovgaard Andersen, Anders Rantzer

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

Abstract

Large-scale interconnected uncertain systems commonly have large state and uncertainty dimensions. Aside from the heavy computational cost of performing robust stability analysis in a centralized manner, privacy requirements in the network can also introduce further issues. In this paper, we utilize IQC analysis for analyzing large-scale interconnected uncertain systems and we evade these issues by describing a decomposition scheme that is based on the interconnection structure of the system. This scheme is based on the so-called chordal decomposition and does not add any conservativeness to the analysis approach. The decomposed problem can be solved using distributed computational algorithms without the need for a centralized computational unit. We further discuss the merits of the proposed analysis approach using a numerical experiment.

Original language	English
Title of host publication	Proceedings of the 19th IFAC World Congress, 2014
Editors	Edward Boje, Xiaohua Xia
Publisher	International Federation of Automatic Control
Publication date	2014
Pages	2594-2599
ISBN (Print)	978-3-902823-62-5
DOIs	https://doi.org/10.3182/20140824-6-ZA-1003.01649
Publication status	Published - 2014
Event	19th World Congress of the International Federation of Automatic Control (IFAC 2014) - Cape Town, South Africa Duration: 24 Aug 2014 → 29 Aug 2014 http://www.ifac2014.org/

Conference

Conference	19th World Congress of the International Federation of Automatic Control (IFAC 2014)
Country/Territory	South Africa
City	Cape Town
Period	24/08/2014 → 29/08/2014
Other	The theme of the congress: “Promoting automatic control for the benefit of humankind”
Internet address	http://www.ifac2014.org/

Series	I F A C Workshop Series
Number	1
Volume	19
ISSN	1474-6670

Keywords

Robustness analysis
Networked systems
Convex optimization

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Pakazad, Sina Khoshfetrat ; Hansson, Anders ; Andersen, Martin Skovgaard et al. / Distributed Robustness Analysis of Interconnected Uncertain Systems Using Chordal Decomposition. Proceedings of the 19th IFAC World Congress, 2014. editor / Edward Boje ; Xiaohua Xia. International Federation of Automatic Control, 2014. pp. 2594-2599 (I F A C Workshop Series; No. 1, Vol. 19).

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abstract = "Large-scale interconnected uncertain systems commonly have large state and uncertainty dimensions. Aside from the heavy computational cost of performing robust stability analysis in a centralized manner, privacy requirements in the network can also introduce further issues. In this paper, we utilize IQC analysis for analyzing large-scale interconnected uncertain systems and we evade these issues by describing a decomposition scheme that is based on the interconnection structure of the system. This scheme is based on the so-called chordal decomposition and does not add any conservativeness to the analysis approach. The decomposed problem can be solved using distributed computational algorithms without the need for a centralized computational unit. We further discuss the merits of the proposed analysis approach using a numerical experiment.",

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Pakazad, SK, Hansson, A, Andersen, MS & Rantzer, A 2014, Distributed Robustness Analysis of Interconnected Uncertain Systems Using Chordal Decomposition. in E Boje & X Xia (eds), Proceedings of the 19th IFAC World Congress, 2014. International Federation of Automatic Control, I F A C Workshop Series, no. 1, vol. 19, pp. 2594-2599, 19th World Congress of the International Federation of Automatic Control (IFAC 2014), Cape Town, South Africa, 24/08/2014. https://doi.org/10.3182/20140824-6-ZA-1003.01649

Distributed Robustness Analysis of Interconnected Uncertain Systems Using Chordal Decomposition. / Pakazad, Sina Khoshfetrat; Hansson, Anders; Andersen, Martin Skovgaard et al.
Proceedings of the 19th IFAC World Congress, 2014. ed. / Edward Boje; Xiaohua Xia. International Federation of Automatic Control, 2014. p. 2594-2599 (I F A C Workshop Series; No. 1, Vol. 19).

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

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N2 - Large-scale interconnected uncertain systems commonly have large state and uncertainty dimensions. Aside from the heavy computational cost of performing robust stability analysis in a centralized manner, privacy requirements in the network can also introduce further issues. In this paper, we utilize IQC analysis for analyzing large-scale interconnected uncertain systems and we evade these issues by describing a decomposition scheme that is based on the interconnection structure of the system. This scheme is based on the so-called chordal decomposition and does not add any conservativeness to the analysis approach. The decomposed problem can be solved using distributed computational algorithms without the need for a centralized computational unit. We further discuss the merits of the proposed analysis approach using a numerical experiment.

AB - Large-scale interconnected uncertain systems commonly have large state and uncertainty dimensions. Aside from the heavy computational cost of performing robust stability analysis in a centralized manner, privacy requirements in the network can also introduce further issues. In this paper, we utilize IQC analysis for analyzing large-scale interconnected uncertain systems and we evade these issues by describing a decomposition scheme that is based on the interconnection structure of the system. This scheme is based on the so-called chordal decomposition and does not add any conservativeness to the analysis approach. The decomposed problem can be solved using distributed computational algorithms without the need for a centralized computational unit. We further discuss the merits of the proposed analysis approach using a numerical experiment.

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Pakazad SK, Hansson A, Andersen MS, Rantzer A. Distributed Robustness Analysis of Interconnected Uncertain Systems Using Chordal Decomposition. In Boje E, Xia X, editors, Proceedings of the 19th IFAC World Congress, 2014. International Federation of Automatic Control. 2014. p. 2594-2599. (I F A C Workshop Series; No. 1, Vol. 19). doi: 10.3182/20140824-6-ZA-1003.01649

Distributed Robustness Analysis of Interconnected Uncertain Systems Using Chordal Decomposition

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