I am working with open Modelica now a days and i wanted to know if there is any way to change the frequency of the sine voltage source e.g the frequency of the source doubles or triples every 3 seconds so that when i draw the graph for a low pass filter i could see the magnitude of the output voltage decrease with time. Is there any way to model such voltage source? Please reply as soon as possible.
You can probably use a when or if statement that sets the frequency of the source at certain sample interval. See when/reinit in the Modelica specification.