Pod A-posteriori Error Based Inexact Sqp Method for Bilinear Elliptic Optimal Control Problems

A RESIDUAL–BASED POSTERIORI ERROR ESTIMATES FOR hp FINITE ELEMENT SOLUTIONS OF GENERAL BILINEAR OPTIMAL CONTROL PROBLEMS

In this paper, we investigate a residual-based posteriori error estimates for the hp finite element approximation of general optimal control problems governed by bilinear elliptic equations. By using the hp discontinuous Galerkin finite element approximation for the control and the hp finite element approximation for both the state and the co-state, we derive a posteriori upper error bounds for...

POD a-posteriori error estimates for linear-quadratic optimal control problems

The main focus of this paper is on an a-posteriori analysis for the method of proper orthogonal decomposition (POD) applied to optimal control problems governed by parabolic and elliptic PDEs. Based on a perturbation method it is deduced how far the suboptimal control, computed on the basis of the POD model, is from the (unknown) exact one. Numerical examples illustrate the realization of the p...

Trust-Region POD using A-Posteriori Error Estimation for Semilinear Parabolic Optimal Control Problems

An optimal control problem governed by a semilinear heat equation is solved using a globalized inexact Newton method. To reduce the computational effort a model order reduction approach based on proper orthogonal decomposition (POD) is applied. Within a trust region framework we guarantee that the reducedorder models are sufficiently accurate by ensuring gradient accuracy. The gradient error is...

POD based inexact SQP methods for optimal control problems governed by a semilinear heat equation

Proximal Methods for Elliptic Optimal Control Problems with Sparsity Cost Functional

First-order proximal methods that solve linear and bilinear elliptic optimal control problems with a sparsity cost functional are discussed. In particular, fast convergence of these methods is proved. For benchmarking purposes, inexact proximal schemes are compared to an inexact semismooth Newton method. Results of numerical experiments are presented to demonstrate the computational effectivene...