Nonlinear Model-Based Control of Nonminimum-Phase Processes

This paper reviews the properties of model-state feedback and input/output linearizing state feedback for the synthesis of nonlinear controllers. These concepts are extended to nonminimum-phase systems, where a synthetic output, which is statically equivalent to the actual process output, is used to design the model-state feedback controller. Systematic procedures are outlined for the construction of the synthetic output and the assignment of local zeros. The proposed controller is illustrated with a nonminimum-phase van de Vusse reactor through simulations.