Pole Placement-Based NMPC of Hammerstein Systems and Its Application to Grade Transition Control of Polypropylene

Figure 1

MI and 𝐸_𝑡 output trajectories of grade transition processes. (Solid line is the set-point, dotted line the instantaneous, and dashed line the cumulative).

(a) Melt index

(b) Concentration of ethylene in polypropylene