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Nominal values

#6507  Permalink Top

Nominal values

Nov-20-15 08:20:08

Hi

Are nominal values used in OpenModelica to scale values automatically. Are there some flags that need to be enabled?

Best regards
Daniel

#6509  Permalink Top

Re: Nominal values

Nov-20-15 10:08:13

Nominal values are used in different ways in OpenModelica. For example they are used to scale iteration variables for systems of equations. There are also some debug-flags that scale certain variables within the symbolic transformation (see +d=addScaledVars and +d=addScaledVarsInput,
omcflag-debug).

#6510  Permalink Top

Re: Nominal values

Nov-20-15 12:08:28

Thanks for the reply. Does that mean that OM does this type of scaling (as does JModelica [http://www.jmodelica.org/api-docs/usersguide/1.4.0/ch08s07.html]):

T = f(p)

is replaced by the equation

T_scaled*T_nom = f(p_scaled*T_nom)

Or is it only used to stabilize the integration process? Or is that the same thing?

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