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Title: Elliptic optimal control problems with L1-control cost and applications for the placement of control devices
Authors: Stadler, Georg 
Keywords: Optimal control; Nonsmooth regularization; Optimal actuator location; Placement of control devices; Semismooth Newton; Primal-dual method
Issue Date: 2006
Publisher: Centro de Matemática da Universidade de Coimbra
Citation: Pré-Publicações DMUC. 06-42 (2006)
Abstract: Elliptic optimal control problems with L1-control cost are analyzed. Due to the nonsmooth objective functional the optimal controls are identically zero on large parts of the control domain. For applications, in which one cannot put control devices (or actuators) all over the control domain, this provides information about where it is most efficient to put them. We analyze structural properties of L1- control cost solutions. For solving the non-differentiable optimal control problem we propose a semismooth Newton method that can be stated and analyzed in function space and converges locally with a superlinear rate. Numerical tests on model problems show the usefulness of the approach for the location of control devices and the efficiency of our algorithm.
Rights: openAccess
Appears in Collections:FCTUC Matemática - Vários

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