화학공학소재연구정보센터
IEEE Transactions on Automatic Control, Vol.53, No.7, 1678-1683, 2008
Nonlinear stabilization of shock-like unstable equilibria in the viscous Burgers PDE
We stabilize the unstable "shock-like" equilibrium profiles of the viscous Burgers equation using control at the boundaries. These equilibria are not stabilizable (even locally) using the standard "radiation feedback boundary conditions." Using a nonlinear spatially-scaled transformation (that employs three ingredients, of which one is the Hopf-Cole nonlinear integral transformation) and linear backstepping, we design an explicit nonlinear full-state control law that achieves exponential stability, with a region of attraction for which we give an estimate. The region of attraction is not the entire state space since the Burgers; PDE is known not to be globally controllable.