Explicit fragility margins for PWA control laws of discrete-time linear systems

Abstract : The paper considers a given discrete-time linear dynamic in closed loop with a piecewise affine control law defined over a bounded polyhedral partition of the state space χ. The objective is to describe the largest error affecting the control law coefficients over each region in the above partition, for which the positive invariance of the set χ is guaranteed with respect to the closed loop dynamics. This subset describes in fact a robust invariance margin with respect to a subset of closed-loop parameters and subsequently represents the explicit fragility margin of the given piecewise affine controller. The fragility characterizes the impact of an error in the implementation of a given controller. It is shown that the largest subset of errors in the state feedback gains is represented by a polyhedral set explicitly constructed with operations over convex domains. A series of remarks on the structure of the numerical problems are discussed and an example is provided for illustration.
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Communication dans un congrès
ECC 2014, Jun 2014, Strasbourg, France. Proceedings of the 2014 European Control Conference, pp.1450-1455, 〈10.1109/ECC.2014.6862538〉
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https://hal-supelec.archives-ouvertes.fr/hal-01087256
Contributeur : Pascale Lepeltier <>
Soumis le : mardi 25 novembre 2014 - 16:25:49
Dernière modification le : jeudi 29 mars 2018 - 11:06:05

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Ngoc Anh Nguyen, Sorin Olaru, George Bitsoris, Pedro Rodriguez-Ayerbe. Explicit fragility margins for PWA control laws of discrete-time linear systems. ECC 2014, Jun 2014, Strasbourg, France. Proceedings of the 2014 European Control Conference, pp.1450-1455, 〈10.1109/ECC.2014.6862538〉. 〈hal-01087256〉

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