STRUCTRURE AND PERFORMANCE OF STATE FEEDBACK MODEL PREDICTIVE CONTROL SYSTEM AND ITS APPLICATION

In this paper, the structure and performance of state feedback model predictive control systems are studied in detail.Based on the state space model, the structure of state feedback model predictive control systems is a dynamic state variable feedback control using the detected state variable feedback control.Compared with the dynamic model control (DMC), generalized predictive control (GPC) and internal model control (IMC), both the ability of rejection undetectable disturbance is increased and the robustness of the state feedback model predictive control system is improved.Due to the detectable state variable dynamic feedback control structure, the state feedback model predictive control system can be implemented in a big operation scope.When the predictive control system is stable, the steady state error is zero to both the step input and the step disturbance.A real plant design and implementation is given for the stabilizer vapor pressure control of an FCCU (Fluid Catalytic Cracking Unit) in a DCS layer.The plant data shows both the implementation result and the control performance are very good.