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Parameters initialized to fix version compatibility issue. Ver. 3.1 r…
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…equires the params to be initialized before simulation.

git-svn-id: https://openmodelica.org/svn/OpenModelica/trunk/OMNotebook/DrModelica@7428 f25d12d1-65f4-0310-ae8a-bbce733d8d8e
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Mohsen Torabzadeh-Tari committed Dec 16, 2010
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Showing 1 changed file with 43 additions and 38 deletions.
81 changes: 43 additions & 38 deletions Equations/IfEq.onb
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@@ -1,65 +1,69 @@
<!DOCTYPE OMNotebook>
<Notebook>
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<Text>&lt;!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd">
&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;style type="text/css">
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&lt;p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">&lt;span style=" font-family:'Arial'; font-size:38pt; font-weight:600; color:#000000;">Conditional Equations with if-Equations&lt;/span>&lt;/p>&lt;/td>&lt;/tr>&lt;/table>&lt;/body>&lt;/html></Text>
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<TextCell style="Text" >
<TextCell style="Text">
<Text>&lt;!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd">
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&lt;p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">&lt;/p>
&lt;p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; font-size:8pt;">&lt;/p>
&lt;p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; font-family:'Sans'; font-size:10pt;">&lt;/p>
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&lt;p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; font-family:'Times New Roman'; font-size:12pt; color:#000000;">&lt;/p>&lt;/td>&lt;/tr>&lt;/table>&lt;/body>&lt;/html></Text>
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<TextCell style="Text" >
<TextCell style="Text">
<Text>&lt;!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd">
&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;style type="text/css">
p, li { white-space: pre-wrap; }
&lt;/style>&lt;/head>&lt;body style=" font-family:'Sans'; font-size:10pt; font-weight:400; font-style:normal;">
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&lt;table border="0" style="-qt-table-type: root; margin-top:5px; margin-bottom:5px; margin-left:5px; margin-right:5px;">
&lt;tr>
&lt;td style="border: none;">
&lt;p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">&lt;span style=" font-family:'Times New Roman'; font-size:12pt; color:#000000;">Modelica can be used for expressing hybrid models, i.e. models with mixed continuous and discrete parts. &lt;/span>&lt;span style=" font-family:'Courier New'; font-size:12pt; color:#000000;">if&lt;/span>&lt;span style=" font-family:'Times New Roman'; font-size:12pt; color:#000000;">-equations or &lt;/span>&lt;span style=" font-family:'Courier New'; font-size:12pt; color:#000000;">if&lt;/span>&lt;span style=" font-family:'Times New Roman'; font-size:12pt; color:#000000;">-expressions are used for conditional models with different behavior in different operating regions. The conditional equations may contain continuous-time expressions. The &lt;/span>&lt;span style=" font-family:'Courier New'; font-size:12pt; color:#000000;">elseif&lt;/span>&lt;span style=" font-family:'Times New Roman'; font-size:12pt; color:#000000;">-part is optional and can occur zero or more times. The &lt;/span>&lt;span style=" font-family:'Courier New'; font-size:12pt; color:#000000;">else&lt;/span>&lt;span style=" font-family:'Times New Roman'; font-size:12pt; color:#000000;">-part is also optional and can occur at most once. There is a constraint regarding the number of equations in each part of an &lt;/span>&lt;span style=" font-family:'Courier New'; font-size:12pt; color:#000000;">if&lt;/span>&lt;span style=" font-family:'Times New Roman'; font-size:12pt; color:#000000;">-equation: &lt;/span>&lt;span style=" font-family:'Times New Roman'; font-size:12pt; font-style:italic; color:#000000;">If-equations&lt;/span>&lt;span style=" font-family:'Times New Roman'; font-size:12pt; color:#000000;"> for which the conditions have higher variability than &lt;/span>&lt;span style=" font-family:'Courier New'; font-size:12pt; color:#000000;">constant&lt;/span>&lt;span style=" font-family:'Times New Roman'; font-size:12pt; color:#000000;"> or &lt;/span>&lt;span style=" font-family:'Courier New'; font-size:12pt; color:#000000;">parameter&lt;/span>&lt;span style=" font-family:'Times New Roman'; font-size:12pt; color:#000000;"> must include an &lt;/span>&lt;span style=" font-family:'Courier New'; font-size:12pt; color:#000000;">else&lt;/span>&lt;span style=" font-family:'Times New Roman'; font-size:12pt; color:#000000;">-part. Each branch (&lt;/span>&lt;span style=" font-family:'Courier New'; font-size:12pt; color:#000000;">then&lt;/span>&lt;span style=" font-family:'Times New Roman'; font-size:12pt; color:#000000;">-, &lt;/span>&lt;span style=" font-family:'Courier New'; font-size:12pt; color:#000000;">elseif&lt;/span>&lt;span style=" font-family:'Times New Roman'; font-size:12pt; color:#000000;">-, and &lt;/span>&lt;span style=" font-family:'Courier New'; font-size:12pt; color:#000000;">else&lt;/span>&lt;span style=" font-family:'Times New Roman'; font-size:12pt; color:#000000;">-parts) must have the &lt;/span>&lt;span style=" font-family:'Times New Roman'; font-size:12pt; font-style:italic; color:#000000;">same number of equations&lt;/span>&lt;span style=" font-family:'Times New Roman'; font-size:12pt; color:#000000;">.&lt;br />&lt;br />&lt;br />The model &lt;/span>&lt;a href="CompConn/CardEq.onb
">&lt;span style=" font-family:'Times New Roman'; font-size:12pt; text-decoration: underline; color:#0000ff;">Cardinality Resistor&lt;/span>&lt;/a>&lt;span style=" font-family:'Times New Roman'; font-size:12pt; color:#000000;"> contains a conditional &lt;/span>&lt;span style=" font-family:'Courier New'; font-size:12pt; color:#000000;">if-&lt;/span>&lt;span style=" font-family:'Times New Roman'; font-size:12pt; color:#000000;">equation with a &lt;/span>&lt;span style=" font-family:'Times New Roman'; font-size:12pt; font-style:italic; color:#000000;">condition&lt;/span>&lt;span style=" font-family:'Times New Roman'; font-size:12pt; color:#000000;"> that is a parameter expression (the built-in function &lt;/span>&lt;span style=" font-family:'Courier New'; font-size:12pt; color:#000000;">cardinality&lt;/span>&lt;span style=" font-family:'Times New Roman'; font-size:12pt; color:#000000;"> has parameter variability), i.e. the &lt;/span>&lt;span style=" font-family:'Times New Roman'; font-size:12pt; font-style:italic; color:#000000;">condition&lt;/span>&lt;span style=" font-family:'Times New Roman'; font-size:12pt; color:#000000;"> does not change during simulation.&lt;br />&lt;/span>&lt;/p>&lt;/td>&lt;/tr>&lt;/table>&lt;/body>&lt;/html></Text>
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&lt;p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">&lt;span style=" font-family:'Times'; font-size:18pt; font-weight:600; color:#000000;">IfEquation&lt;/span>&lt;/p>&lt;/td>&lt;/tr>&lt;/table>&lt;/body>&lt;/html></Text>
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<Text>&lt;!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd">
&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;style type="text/css">
p, li { white-space: pre-wrap; }
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&lt;p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">&lt;span style=" font-family:'Times New Roman'; font-size:12pt; color:#000000;">The if-equation below specifies different equations for the variable y in three different operating regions, limiting values of y such that: uMin &amp;lt;= y &amp;lt;= uMax.&lt;/span>&lt;/p>&lt;/td>&lt;/tr>&lt;/table>&lt;/body>&lt;/html></Text>
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<GraphCell AutoX="true" AutoY="true" style="Graph" MinorX="0.1" Antialiasing="false" MinorY="0.1" Title="Plot by OpenModelica" LogX="false" LogY="false" MajorX="1" MajorY="1" closed="false" YLabel="" Area="wEgAAAAAAADAMAAAAAAAAEBZAAAAAAAAQD4AAAAAAAA=" ShowGraph="false" Grid="true" XLabel="" Legend="false">
<Input>class IfEquation
parameter Real u;
parameter Real uMax;
parameter Real uMin;
//Parameters need to be initialized before simulation. Otherwise, it gives
//compilation error.
parameter Real u = 4;
parameter Real uMax = 10;
parameter Real uMin = 2;
Real y;
equation
if u > uMax then
Expand All @@ -73,52 +77,53 @@ end IfEquation;</Input>
<Output>{IfEquation}</Output>
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&lt;p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">&lt;span style=" font-family:'Times'; font-size:18pt; font-weight:600; color:#000000;">Simulation of IfEquation&lt;/span>&lt;/p>&lt;/td>&lt;/tr>&lt;/table>&lt;/body>&lt;/html></Text>
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<Text>&lt;!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd">
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&lt;p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">&lt;span style=" font-family:'Times New Roman'; font-size:12pt; color:#000000;">Here the simulation of &lt;/span>&lt;span style=" font-family:'Courier New'; font-size:12pt; color:#000000;">IfEquation&lt;/span>&lt;span style=" font-family:'Times New Roman'; font-size:12pt; color:#000000;"> is shown.&lt;/span>&lt;/p>&lt;/td>&lt;/tr>&lt;/table>&lt;/body>&lt;/html></Text>
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<GraphCell AutoX="true" AutoY="true" style="Graph" MinorX="0.1" Antialiasing="false" MinorY="0.1" Title="Plot by OpenModelica" LogX="false" LogY="false" MajorX="1" MajorY="1" closed="false" YLabel="" Area="wEgAAAAAAADAMAAAAAAAAEBZAAAAAAAAQD4AAAAAAAA=" ShowGraph="false" Grid="true" XLabel="" Legend="false">
<Input>simulate( IfEquation ) //?? Incomplete model example - cannot be simulated</Input>
<Output>record SimulationResult
resultFile = "Simulation failed.
Warning: Parameter u has no value, and is fixed during initialization (fixed=true)
Warning: Parameter uMax has no value, and is fixed during initialization (fixed=true)
Warning: Parameter u has no value, and is fixed during initialization (fixed=true)
Warning: Parameter uMin has no value, and is fixed during initialization (fixed=true)
Warning: Parameter u has no value, and is fixed during initialization (fixed=true)
Warning: Parameter uMax has no value, and is fixed during initialization (fixed=true)
Warning: Parameter u has no value, and is fixed during initialization (fixed=true)
Warning: Parameter uMin has no value, and is fixed during initialization (fixed=true)
Error: Error occured while flattening model IfEquation
"
resultFile = "IfEquation_res.plt",
simulationOptions = "startTime = 0.0, stopTime = 1.0, numberOfIntervals = 500, tolerance = 1e-06, method = 'dassl', fileNamePrefix = 'IfEquation', storeInTemp = false, noClean = false, options = '', outputFormat = 'plt'",
messages = "",
timeFrontend = 0.00709280090067313,
timeBackend = 0.000882654080337026,
timeSimCode = 0.000503066730548156,
timeTemplates = 0.00716836916423735,
timeCompile = 1.34944434278658,
timeSimulation = 0.164572312961564,
timeTotal = 1.52972619425095
end SimulationResult;</Output>
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