Modelica Frequency/Time Domain combined equations -


im creating model of rather complex electric circuit in modelica. want find out how include "s" equations (i mean frequency domain equations) in model. of course may transform expresion time , use modelicas internal "time" variable, not sure optimal way complete model. in advance.

in modelica can implement block switch 1 domain other , develop equation in proper domain. suggest @ this article written michael tiller.
in general depends on type of equations have implement, whether more convenient write equations in time or frequency domain, although have take account going time domain frequency domain introducing semplifications because of sampling. therefore if equations rewritten in time not stiff or if not introducing non-linearities, , if have big range of frequencies in systems, think better rewrite equations in time domain.

i hope helps, marco


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