A numerical algorithm for set-point regulation of non-linear parabolic control systems

Eugenio Aulisa, David Gilliam

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


In this paper we hope to draw attention to a particularly simple and extremely flexible design strategy for solving a wide class of "set-point" regulation problems for nonlinear parabolic boundary control systems. By this we mean that the signals to be tracked and disturbances to be rejected are time independent. The theoretical underpinnings of our approach is the well known regulator equations from the geometric theory of regulation applicable in the neighborhood of an equilibrium. The most important point of this work is the wide applicability of the design methodology. In the examples we have employed unbounded sensing and actuation but the method works equally well for bounded input and output operators and even finite dimensional nonlinear control systems. Our examples include: multi-input multi-output regulation for a boundary controlled viscous Burgers' equation; control of a Navier-Stokes Flow in a Two Dimensional Forked Channel; control problem for a Non-Isothermal Navier-Stokes Flow in a Two Dimensional Box Domain. Along the way we provide some discussion to demonstrate how the method can be altered to provide many alternative control mechanisms. In particular, in the last section we show how the method can be adapted to solve tracking and disturbance rejection for piecewise constant time dependent signals.

Original languageEnglish
Pages (from-to)54-85
Number of pages32
JournalInternational Journal of Numerical Analysis and Modeling
Issue number1
StatePublished - 2014


  • Boundary control system
  • Center manifold
  • Regulator equations


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