Output feedback control of dissipative distributed processes via microscopic simulations

A continuous-time feedback controller design methodology is developed for distributed processes, whose dynamic behavior can be described by microscopic evolution rules. Employing the micro-Galerkin method to bridge the gap between the microscopic-level evolution rules and the “coarse” process behavi...

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Bibliographic Details
Published in:Computers & chemical engineering 2005-03, Vol.29 (4), p.771-782
Main Author: Armaou, Antonios
Format: Article
Language:English
Subjects:
Carleman linearization
Coarse timesteppers, Linear optimal control
Distributed parameter systems
Multiscale systems
Nonlinear control
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Summary:A continuous-time feedback controller design methodology is developed for distributed processes, whose dynamic behavior can be described by microscopic evolution rules. Employing the micro-Galerkin method to bridge the gap between the microscopic-level evolution rules and the “coarse” process behavior, “coarse” process steady-states are estimated and nonlinear process models are identified off-line through the solution of a series of nonlinear programs. Subsequently, output feedback controllers are designed, on the basis of the nonlinear process model, that enforce stability in the closed-loop system. The method is used to control a system of coupled nonlinear one-dimensional PDEs (the FitzHugh–Nagumo equations), widely used to describe the formation of patterns in reacting and biological systems. Employing kinetic theory based microscopic realizations of the process, the method is used to design output feedback controllers that stabilize the FitzHugh–Nagumo equations at an unstable, nonuniform in space, steady state.
ISSN:0098-1354
1873-4375
DOI:10.1016/j.compchemeng.2004.09.008