The 1-D convection diffusion equation: Galerkin least squares approximations and feedback control | IEEE Conference Publication | IEEE Xplore

The 1-D convection diffusion equation: Galerkin least squares approximations and feedback control


Abstract:

The standard Galerkin finite element approximation of the convection diffusion equation is known to be numerically unstable for small values of the diffusion parameter. O...Show More

Abstract:

The standard Galerkin finite element approximation of the convection diffusion equation is known to be numerically unstable for small values of the diffusion parameter. One way to overcome this difficulty is to use a stabilized finite element method, such as Galerkin least squares, and one finds this approach in the simulation literature. In this paper, we investigate the effect of a stabilized finite element approximation of the convection diffusion equation in the context of feedback control design. The issue at hand is how the additional stabilizing terms affect the resulting controller. We show that the stabilized system provides accurate controllers, and can compute them on coarser grids than the unstabilized system.
Date of Conference: 14-17 December 2004
Date Added to IEEE Xplore: 16 May 2005
Print ISBN:0-7803-8682-5
Print ISSN: 0191-2216
Conference Location: Nassau, Bahamas

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