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attributesmodelicadymola

Why Attributes min, max in Dymola/Modelica doesn't work?

I'm trying to limit the value using 'min', 'max' attributes like this way below.

SI.Angle thetta_out(start=0, min=0, max=31.4)

But min and max attributes are not working. The value is varying with no constraint and only start values's working as i set.

Can someone figure out what's the problem?

I'don't want to make a logic to handle this problem like if- statement because this makes the system slow and twisted.

Solution

  • min and max values are only used as hints, not as hard limits. In Dymola you can set flags to enforce it as hard limit, go to Edit, Options, Flags, then search for "min":

    Advanced.AssertNonLinearInsideMinMax = true;

    It is probably sufficient to set Advanced.AssertNonLinearInsideMinMax = true;. As an alternative to the Flag editor GUI you can also set the flags from the command window.