Robust Stable Nonlinear Control and Design of a Cstr in a Large Operating Range

In this work an approach based on nonlinear dynamics is used for the integrated design and controller tuning of a CSTR. The approach enables integrated design optimization and robust tuning of a linearizing feedback controller. The controller setting found by the approach guarantees robust stability of the process over a large range of set point variations even in the presence of parameter uncertainty. The method enforces robust stability by introducing lower bounds on the parametric distance of the operating point to critical boundaries in the space of process and controller parameters. For stabilization of a large range of operations, a lower bound on the distance to a nontransversal Hopf bifurcation has to be considered in this particular case. Copyright c ©2004 IFAC