A search algorithm for the compact uncertainty region of system elements with interval and affine constraint properties

This study proposes a search algorithm for the compact uncertainty region of system elements with affine constraints and interval information. While existing studies have considered only the interval information of uncertainty, the proposed algorithm reflects both the interval and affine constraints...

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Published inApplied mathematics and computation Vol. 477; p. 128823
Main Authors Sub Lee, Ho, Park, Chan-eun, Park, PooGyeon
Format Journal Article
LanguageEnglish
Published Elsevier Inc 15.09.2024
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ISSN0096-3003
DOI10.1016/j.amc.2024.128823

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Abstract This study proposes a search algorithm for the compact uncertainty region of system elements with affine constraints and interval information. While existing studies have considered only the interval information of uncertainty, the proposed algorithm reflects both the interval and affine constraints of uncertain elements to reduce conservatism due to uncertainties. First, the affine constraints of uncertainty are plotted in an N-dimensional space, where N is the number of elements that should be considered. Due to the properties of the affine constraints, the affine constraints are expressed as an (N-1) dimensional structure. The interval information is then expressed as an N-dimensional structure. The algorithm iteratively checks the edges of the N-dimensional structure between two geometrical structures to determine the intersection region. The algorithm then collects the vertices of the convex polytope that overlap the two structures. To show the effectiveness of proposed algorithm, this study proposes a consensus criterion for a multi-agent time-delayed system with uncertain switching topologies as an application of a system with uncertainties in system elements. •We clarify the motivation and contribution of this paper.•We update figures in Example 1.•We add the Example 2 to better show the efficiency of proposed algorithm.•To help us understand, we added Remarks 1, 8.
AbstractList This study proposes a search algorithm for the compact uncertainty region of system elements with affine constraints and interval information. While existing studies have considered only the interval information of uncertainty, the proposed algorithm reflects both the interval and affine constraints of uncertain elements to reduce conservatism due to uncertainties. First, the affine constraints of uncertainty are plotted in an N-dimensional space, where N is the number of elements that should be considered. Due to the properties of the affine constraints, the affine constraints are expressed as an (N-1) dimensional structure. The interval information is then expressed as an N-dimensional structure. The algorithm iteratively checks the edges of the N-dimensional structure between two geometrical structures to determine the intersection region. The algorithm then collects the vertices of the convex polytope that overlap the two structures. To show the effectiveness of proposed algorithm, this study proposes a consensus criterion for a multi-agent time-delayed system with uncertain switching topologies as an application of a system with uncertainties in system elements. •We clarify the motivation and contribution of this paper.•We update figures in Example 1.•We add the Example 2 to better show the efficiency of proposed algorithm.•To help us understand, we added Remarks 1, 8.
ArticleNumber 128823
Author Park, PooGyeon
Park, Chan-eun
Sub Lee, Ho
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Keywords Linear matrix inequality
Switching topology
Uncertainty of system elements
Multi-agent systems
Uncertain transition rate
Language English
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Snippet This study proposes a search algorithm for the compact uncertainty region of system elements with affine constraints and interval information. While existing...
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SubjectTerms Linear matrix inequality
Multi-agent systems
Switching topology
Uncertain transition rate
Uncertainty of system elements
Title A search algorithm for the compact uncertainty region of system elements with interval and affine constraint properties
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