Calculation of critical fault recovery time for nonlinear systems based on region of attraction analysis

Mojtaba Tabatabaeipour, Mogens Blanke

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Abstract

In safety critical systems, the control system is composed of a core control system with a fault detection and isolation scheme together with a repair or a recovery strategy. The time that it takes to detect, isolate, and recover from the fault (fault recovery time) is a critical factor in safety of a system. It must be guaranteed that the trajectory of a system subject to fault remains in the region of attraction (ROA) of the post-fault system during this time. This paper proposes a new algorithm to compute the critical fault recovery time for nonlinear systems with
polynomial vector elds using sum of squares programming. The proposed algorithm is based on computation of ROA of the recovered system and nite-time stability of the faulty system.
Original languageEnglish
Title of host publicationProceedings of the 19th IFAC World Congress
Number of pages6
PublisherInternational Federation of Automatic Control
Publication date2014
Publication statusPublished - 2014
Event19th World Congress of the International Federation of Automatic Control (IFAC 2014) - Cape Town, South Africa
Duration: 24 Aug 201429 Aug 2014
http://www.ifac2014.org/

Conference

Conference19th World Congress of the International Federation of Automatic Control (IFAC 2014)
Country/TerritorySouth Africa
CityCape Town
Period24/08/201429/08/2014
OtherThe theme of the congress: “Promoting automatic control for the benefit of humankind”
Internet address

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