Dynamic Analysis
This analysis means that we observe course of the state
variables in time after the step change of some input
variable. The step changes of volumetric flow rates q
and qc are input variables in our case and the steadystatel
values in Equation (6) are initial conditions for the
set of ODE (1). The Runge-Kutta’s fourth order method
was used for numerical solving of the set of ODE.
Six step changes of each input variable (±80%, ±40%,
±20% of its value in working point (5)) were done and
the results are shown in Figure 4 – Figure 7 . The output
variables y1 and y2 represents difference between the
actual value and the steady-state value of the variable: