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Construction of the Minimum Time Function for Linear Systems Via Higher-Order Set-Valued Methods

Titelangaben

Baier, Robert ; Le, Thuy Thi Thien:
Construction of the Minimum Time Function for Linear Systems Via Higher-Order Set-Valued Methods.
In: Mathematical Control and Related Fields. (2018) . - 34 S..
ISSN 2156-8472

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Projekttitel:
Offizieller ProjekttitelProjekt-ID
PhD fellowship for foreign students at the Università di PadovaOhne Angabe

Projektfinanzierung: Andere
Fondazione CARIPARO

Abstract

The paper is devoted to introducing an approach to compute the approximate minimum time function of control problems which is based on reachable set approximation and uses arithmetic operations for convex compact sets. In particular, in this paper the theoretical justification of the proposed approach is restricted to a class of linear control systems. The error estimate of the fully discrete reachable set is provided by employing the Hausdorff distance to the continuous-time reachable set. The detailed procedure solving the corresponding discrete set-valued problem is described. Under standard assumptions, by means of convex analysis and knowledge of the regularity of the true minimum time function, we estimate the error of its approximation. Higher-order discretization of the reachable set of the linear control problem can balance missing regularity (e.g., if only Hölder continuity holds) of the minimum time function for smoother problems. To illustrate the error estimates and to demonstrate differences to other numerical approaches we provide a collection of numerical examples which either allow higher order of convergence with respect to time discretization or where the continuity of the minimum time function cannot be sufficiently granted, i.e., we study cases in which the minimum time function is Hölder continuous or even discontinuous.

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Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Zusätzliche Informationen: accepted for publication
Contents:
1. Introduction
2. Preliminaries
3. Approximation of the minimum time function
3.1 Set-valued discretization methods
3.2 Implementation and error estimate of the reachable set approximation
3.3 Error estimate of the minimum time function
4. Convergence and reconstruction of discrete optimal controls
5. Numerical tests
5.1 Linear examples
5.2 A nonlinear example
5.3 Non-strict expanding property of reachable sets
5.4 Problematic examples
6. Conclusions
published in two parts in arXiv at December 2015
Keywords: minimum time function; reachable sets; linear control problems; higher-order set-valued methods; direct discretization methods
Fachklassifikationen: Mathematics Subject Classification Code: 49N60 93B03 (49N05 49M25 52A27)
Institutionen der Universität: Fakultäten
Fakultäten > Fakultät für Mathematik, Physik und Informatik
Fakultäten > Fakultät für Mathematik, Physik und Informatik > Mathematisches Institut
Fakultäten > Fakultät für Mathematik, Physik und Informatik > Mathematisches Institut > Lehrstuhl Mathematik V (Angewandte Mathematik)
Profilfelder
Profilfelder > Advanced Fields
Profilfelder > Advanced Fields > Nichtlineare Dynamik
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 510 Mathematik
Eingestellt am: 31 Okt 2018 07:30
Letzte Änderung: 31 Okt 2018 07:30
URI: https://eref.uni-bayreuth.de/id/eprint/46178