Guaranteed lower bounds for cost functionals of time-periodic parabolic optimization problems
Wolfmayr, M. (2020). Guaranteed lower bounds for cost functionals of time-periodic parabolic optimization problems. Computers and mathematics with applications, 80(5), 1050-1072. https://doi.org/10.1016/j.camwa.2020.04.021
Published inComputers and mathematics with applications
Embargoed until: 2022-09-01Request copy from author
© 2020 Elsevier Ltd.
In this paper, a new technique is shown for deriving computable, guaranteed lower bounds of functional type (minorants) for two different cost functionals subject to a parabolic time-periodic boundary value problem. Together with previous results on upper bounds (majorants) for one of the cost functionals, both minorants and majorants lead to two-sided estimates of functional type for the optimal control problem. Both upper and lower bounds are derived for the second new cost functional subject to the same parabolic PDE-constraints, but where the target is a desired gradient. The time-periodic optimal control problems are discretized by the multiharmonic finite element method leading to large systems of linear equations having a saddle point structure. The derivation of preconditioners for the minimal residual method for the new optimization problem is discussed in more detail. Finally, several numerical experiments for both optimal control problems are presented confirming the theoretical results obtained. This work provides the basis for an adaptive scheme for time-periodic optimization problems. ...
Publication in research information system
MetadataShow full item record
Related funder(s)Academy of Finland
Funding program(s)Academy Project, AoF
Additional information about fundingThe author gratefully acknowledges the financial support by the Academy of Finland under the grant 295897 and by the Central Finland regional Fund of the Finnish Cultural Foundation
Showing items with similar title or keywords.
Parameter identification for heterogeneous materials by optimal control approach with flux cost functionals Haslinger, Jaroslav; Blaheta, Radim; Mäkinen, Raino A. E. (Elsevier, 2021)The paper deals with the identification of material parameters characterizing components in heterogeneous geocomposites provided that the interfaces separating different materials are known. We use the optimal control ...
Langer, Ulrich; Matculevich, Svetlana; Repin, Sergey (Springer International Publishing, 2018)The paper is concerned with reliable space-time IgA schemes for parabolic initial-boundary value problems. We deduce a posteriori error estimates and investigate their applicability to space-time IgA approximations. ...
Kurz, Stefan; Pauly, Dirk; Praetorius, Dirk; Repin, Sergey; Sebastian, Daniel (Springer, 2021)Functional error estimates are well-established tools for a posteriori error estimation and related adaptive mesh-refinement for the finite element method (FEM). The present work proposes a first functional error estimate ...
Langer, Ulrich; Repin, Sergey; Wolfmayr, Monika (Taylor & Francis Inc., 2016)This article is devoted to the a posteriori error analysis of multiharmonic finite element approximations to distributed optimal control problems with time-periodic state equations of parabolic type. We derive a posteriori ...
Matculevich, Svetlana (University of Jyväskylä, 2015)