Figure 9: Response of the model to a decrease of the spinning band rotational speed.
The speed is reduced to 150 rpm after 60 seconds. As a result of inertia within the system such as the slow discharge of the liquid in the flooding area of the column, there is a delayed flattening of the pressure difference. At this point, the course of the model deviates from the actual course, as a falling trend for the next 20 seconds is already apparent in the model. The classification also indicates that a stable operating condition will be achieved. This is due to the fact that the model was strongly adapted to the speed of the spinning band as a decisive influencing parameter. After 110 seconds a stationary state is reached, which shows that the classification works reliably.