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About WSMCreateModel

J Jesus Rico-Melgoza

J Jesus Rico-Melgoza, Universidad Michoacana de San Nicolas de Hidalgo

Posted 10 years ago

Dear Colleagues Working with WSMCreate model has giving me some problems. For instance, could you help me to understand why the Mathematica code rises a syntax error in the following statement? APF = WSMCreateModel[ "APFModel", {Derivative[1][if][t] == -0.055555555555 if[t] - 55.55555555555556 swt[t] vc[t] - 55.55555555555556 Vs[t], Derivative[1][vc][t] == 1000 if[t] swt[t]}, t, {swt[t] \[Element] "Modelica.Blocks.Interfaces.RealInput", Vs[t] \[Element] "Modelica.Blocks.Interfaces.RealInput", if[t] \[Element] "Modelica.Blocks.Interfaces.RealOutput", vc[t] \[Element] "Modelica.Blocks.Interfaces.RealOutput"}] I have double check this without finding the possible error. Thanks in advance. Jesus

Dear Colleagues Working with WSMCreate model has giving me some problems. For instance, could you help me to understand why the Mathematica code rises a syntax error in the following statement?

APF = WSMCreateModel[
  "APFModel", {Derivative[1][if][t] == -0.055555555555 if[t] - 
     55.55555555555556 swt[t] vc[t] - 55.55555555555556 Vs[t], 
   Derivative[1][vc][t] == 1000 if[t] swt[t]}, 
  t, {swt[t] \[Element] "Modelica.Blocks.Interfaces.RealInput", 
   Vs[t] \[Element] "Modelica.Blocks.Interfaces.RealInput",
   if[t] \[Element] "Modelica.Blocks.Interfaces.RealOutput",
   vc[t] \[Element] "Modelica.Blocks.Interfaces.RealOutput"}]

I have double check this without finding the possible error. Thanks in advance. Jesus

POSTED BY: J Jesus Rico-Melgoza

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Patrik Ekenberg

Patrik Ekenberg, Wolfram MathCore

Posted 10 years ago

POSTED BY: Patrik Ekenberg

J Jesus Rico-Melgoza

J Jesus Rico-Melgoza, Universidad Michoacana de San Nicolas de Hidalgo

Posted 10 years ago

Ooh, yes! So in WSM If and if are the same? Thanks a lot Jesus

POSTED BY: J Jesus Rico-Melgoza

Patrik Ekenberg

Patrik Ekenberg, Wolfram MathCore

Posted 10 years ago

POSTED BY: Patrik Ekenberg

Patrik Ekenberg

Patrik Ekenberg, Wolfram MathCore

Posted 10 years ago

Hello Jesus! Thank you for reporting this. The syntax error arises since "if" is a reserved keyword in Modelica, denoting if-statements. Thus you cannot have variables named "if" (or other reserved keywords). The easiest work-around is to use another name for your variable. The code below, where I renamed "if", "x" should work. APF = WSMCreateModel[ "APFModel", {Derivative[1][x][t] == -0.055555555555 x[t] - 55.55555555555556 swt[t] vc[t] - 55.55555555555556 Vs[t], Derivative[1][vc][t] == 1000 x[t] swt[t]}, t, {swt[t] \[Element] "Modelica.Blocks.Interfaces.RealInput", Vs[t] \[Element] "Modelica.Blocks.Interfaces.RealInput", x[t] \[Element] "Modelica.Blocks.Interfaces.RealOutput", vc[t] \[Element] "Modelica.Blocks.Interfaces.RealOutput"}] Regards, Patrik

Hello Jesus!

Thank you for reporting this. The syntax error arises since "if" is a reserved keyword in Modelica, denoting if-statements. Thus you cannot have variables named "if" (or other reserved keywords). The easiest work-around is to use another name for your variable. The code below, where I renamed "if", "x" should work.

APF = WSMCreateModel[
  "APFModel", {Derivative[1][x][t] == -0.055555555555 x[t] - 
     55.55555555555556 swt[t] vc[t] - 55.55555555555556 Vs[t], 
   Derivative[1][vc][t] == 1000 x[t] swt[t]}, 
  t, {swt[t] \[Element] "Modelica.Blocks.Interfaces.RealInput", 
   Vs[t] \[Element] "Modelica.Blocks.Interfaces.RealInput", 
   x[t] \[Element] "Modelica.Blocks.Interfaces.RealOutput", 
   vc[t] \[Element] "Modelica.Blocks.Interfaces.RealOutput"}]

Regards, Patrik

POSTED BY: Patrik Ekenberg

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