Issue |
ESAIM: COCV
Volume 24, Number 2, April–June 2018
|
|
---|---|---|
Page(s) | 811 - 834 | |
DOI | https://doi.org/10.1051/cocv/2017049 | |
Published online | 13 June 2018 |
Regular Article
Regularization and discretization error estimates for optimal control of ODEs with group sparsity
1
Friedrich-Schiller-Universität Jena, Fakultät für Mathematik und Informatik, Professur Mathematische Optimierung,
07743
Jena, Germany
christopher.schneider@uni-jena.de
2
Technische Universität Chemnitz, Faculty of Mathematics, Professorship Numerical Mathematics (Partial Differential Equations),
09107
Chemnitz, Germany
a Corresponding author: gerd.wachsmuth@mathematik.tu-chemnitz.de, http://www.tu-chemnitz.de/mathematik/part_dgl/people/wachsmuth, http://orcid.org/0000-0002-3098-1503
Received:
15
July
2016
Revised:
21
February
2017
Accepted:
29
June
2017
It is well known that optimal control problems with L1-control costs produce sparse solutions, i.e., the optimal control is zero on whole intervals. In this paper, we study a general class of convex linear-quadratic optimal control problems with a sparsity functional that promotes a so-called group sparsity structure of the optimal controls. In this case, the components of the control function take the value of zero on parts of the time interval, simultaneously. These problems are both theoretically interesting and practically relevant. After obtaining results about the structure of the optimal controls, we derive stability estimates for the solution of the problem w.r.t. perturbations and L2-regularization. These results are consequently applied to prove convergence of the Euler discretization. Finally, the usefulness of our approach is demonstrated by solving an illustrative example using a semismooth Newton method.
Mathematics Subject Classification: 49K15 / 49J15 / 49M15 / 49M25 / 65K15
Key words: Optimal control / group sparsity / directional sparsity / bang-bang principle / stability analysis / discretization error estimates
© EDP Sciences, SMAI 2018
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