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5 Development of a Simulation-based Methodology …
Figure 5.37 Optimization experiment visualization in AnyLogic
Pf lowSand =
t
Pf lowproducing + Pf lowsetup + Pf low f ail
Pf lowWash =
t
Pf lowproducing + Pf lowsetup + Pf low f ail
(5.6)
For the peak avoidance, the production planning and control allows the
rescheduling of single machines between three seconds (0,05 minutes) and three
minutes. Therefore, a new optimization parameter, the peak optimization offset,
is added to the model to be able to influence the start of production machines.
The offset parameter is used to vary the machine state within the given range and
has to be added to the machine logic, as it is directly influencing the machine
control. To realize the offset, an internal off delay state is added to the off state
of the machines. The off delay is entered when the machine gets the message to
start the warmup process and thus leaves the variable off state. The off delay is
linked to a timeout, meaning the machine leaves the off delay for the warmup
process after the timeout duration has passed. The timeout duration is defined
as a variable parameter, the peakOptimizationOffset, which is then used for the
PeakConsumptionOptimizer experiment (Figure 5.38).