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.