Low Order Controller Design for Continuous Fluidized Bed Spray Granulation with Internal Product Classification by Robust Control Methods

This paper is concerned with stabilizing open loop unstable fluidized bed spray granulation with internal product classification by means of low order control methods. The process under investigation can be described by a population balance equation. In order to design a low order controller numerical approximation and model reduction methods are applied resulting in a low order design model. Stability when applying the low order control to the original plant can be guaranteed under certain conditions on the approximation and reduction methods and the robustness of the designed controller. The controller is validated by simulation of the nonlinear plant model.