JARA2i.CaseStudies.Boiler.VirtualLab

Modelica model of the industrial intended to be used in a virtual lab completely described in Modelica. The VirtualLabBuilder Modelica library has to be used.

Information

Modelica model of the industrial boiler intended to be used in a virtual lab completely described in Modelica. The VirtualLabBuilder Modelica library has to be used.

The implementation of this virtual-lab is discussed in (Martin, Urquia and Dormido 2007).

References

Martin, C. and A. Urquia and S. Dormido (2007): Implementation of Interactive Virtual Laboratories for Control Education Using Modelica. Proceedings of European Control Conference 2007, Kos (Greece), pp. 2679-2686.

Package Content

Name Description

sourceLiqCntrl Liquid source

steamPowerBoiler Industrial boiler model

valve Valve

controlledSystem Controlled system + 2 PID controllers

SetPoint Set-point

water Water CV

viewBoiler Modelica description of the virtual-lab view

Interactive Modelica description of the virtual-lab

Switch Switch between two Real signals

Name	Description
sourceLiqCntrl	Liquid source
steamPowerBoiler	Industrial boiler model
valve	Valve
controlledSystem	Controlled system + 2 PID controllers
SetPoint	Set-point
water	Water CV
viewBoiler	Modelica description of the virtual-lab view
Interactive	Modelica description of the virtual-lab
Switch	Switch between two Real signals

JARA2i.CaseStudies.Boiler.VirtualLab.sourceLiqCntrl

Liquid source

JARA2i.CaseStudies.Boiler.VirtualLab.sourceLiqCntrl

Information

Controller of the heat source

Parameters

Type Name Default Description

Integer nComp 1 Number of components

Type	Name	Default	Description
Integer	nComp	1	Number of components

Connectors

Type Name Description

cutEmitter setPointSignal Set-point of the total volumetric flow, component volume fraction and temperature

cutReceiver cutReceiver

Type	Name	Description
cutEmitter	setPointSignal	Set-point of the total volumetric flow, component volume fraction and temperature
cutReceiver	cutReceiver

Modelica definition

model sourceLiqCntrl "Liquid source" 
  
   extends JARA2i.interf.sourceVolLiqSignalI(nComp=1);
  
   Real flowVSP(  unit="L3.t-1", start=0) "Setpoint of the volumetric flow";
   Real tempSP(   unit="T",      start=297) "Setpoint of the flow temperature";
  
  JARA2i.cutsB.cutReceiver cutReceiver(dim = 1);
equation 
   totalVolFSP    = flowVSP;
   volFractSP     = {1};
   tempFSP        = tempSP;
  
   cutReceiver.signal[1] = -flowVSP;
   der(tempSP)  = 0;
  
  
end sourceLiqCntrl;

JARA2i.CaseStudies.Boiler.VirtualLab.steamPowerBoiler

Industrial boiler model

JARA2i.CaseStudies.Boiler.VirtualLab.steamPowerBoiler

Parameters

Type Name Default Description

Boolean Ejs true Global variable - Runtime interactivity

Boolean Sysquake false Global variable - Batch interactivity

Real perfGasConst 8.31 Constant of the perfect gases [J/(mol*K)]

Real CpCoefML[1, 7] [4.18E3, 0, 0, 0, 0, 0, 0] Heat capacity per mass unit of the liquid. [Cp]: J/(Kg*K)

Real CpCoefNG[1, 7] [55.486, 54.24E-3, 0, 0, 0, ... Molar heat capacity, at constant pressure, of the vapor. [Cp]:J/(mol*K)

Real molecWeigth[:] {18E-3} Molecular weigth of the water [Kg/mol]

Real density[:] {1E3} Density of liquid water [Kg/m3]

Real molEnthalpyGRef[:] {-241.8322E3} Reference molar enthalpy of the vapor [J/mol]

Real massEnthalpyLRef[:] {-15.88E6} Reference enthalpy per mass unit of the liquid [J/Kg]

Real tempRef 298 Enthalpy reference temperature [K]

Real Kprop 10 Parameter of the boiling model [Kg/(s*K)]

Real Kvalve (1.1E-7/molecWeigth[1]) Valve coefficient [mol/(s*N/m**2)]

Real pressDownStreamInitial 11 Output pressure [N/m**2]

Real tempDownStreamInitial 300 Output temperature [K]

Real sectionInitial 1 Boiler cross-section [m2]

Real vesselVolumeInitial 5.66 Boiler volume [m3]

Real molVaporInitial[:] {1273} [mol]

Real tempVaporInitial 463 [K]

Real massWaterInitial[:] {2200} [Kg]

Real tempWaterInitial 420 [K]

Type	Name	Default	Description
Boolean	Ejs	true	Global variable - Runtime interactivity
Boolean	Sysquake	false	Global variable - Batch interactivity
Real	perfGasConst	8.31	Constant of the perfect gases [J/(mol*K)]
Real	CpCoefML[1, 7]	[4.18E3, 0, 0, 0, 0, 0, 0]	Heat capacity per mass unit of the liquid. [Cp]: J/(Kg*K)
Real	CpCoefNG[1, 7]	[55.486, 54.24E-3, 0, 0, 0, ...	Molar heat capacity, at constant pressure, of the vapor. [Cp]:J/(mol*K)
Real	molecWeigth[:]	{18E-3}	Molecular weigth of the water [Kg/mol]
Real	density[:]	{1E3}	Density of liquid water [Kg/m3]
Real	molEnthalpyGRef[:]	{-241.8322E3}	Reference molar enthalpy of the vapor [J/mol]
Real	massEnthalpyLRef[:]	{-15.88E6}	Reference enthalpy per mass unit of the liquid [J/Kg]
Real	tempRef	298	Enthalpy reference temperature [K]
Real	Kprop	10	Parameter of the boiling model [Kg/(s*K)]
Real	Kvalve	(1.1E-7/molecWeigth[1])	Valve coefficient [mol/(sN/m*2)]
Real	pressDownStreamInitial	11	Output pressure [N/m**2]
Real	tempDownStreamInitial	300	Output temperature [K]
Real	sectionInitial	1	Boiler cross-section [m2]
Real	vesselVolumeInitial	5.66	Boiler volume [m3]
Real	molVaporInitial[:]	{1273}	[mol]
Real	tempVaporInitial	463	[K]
Real	massWaterInitial[:]	{2200}	[Kg]
Real	tempWaterInitial	420	[K]

Modelica definition

partial model steamPowerBoiler "Industrial boiler model" 
  
   // Interactivity
   inner parameter Boolean Ejs =      true 
    "Global variable - Runtime interactivity";
   inner parameter Boolean Sysquake = false 
    "Global variable - Batch interactivity";
  
   parameter Real perfGasConst(   unit="J/(mol*K)") = 8.31 
    "Constant of the perfect gases";
   parameter Real CpCoefML[1,7] = [ 4.18E3, 0, 0, 0, 0, 0, 0] 
    "Heat capacity per mass unit of the liquid. [Cp]: J/(Kg*K)";
   parameter Real CpCoefNG[1,7] = [ 55.486, 54.24E-3, 0, 0, 0, 0, 0] 
    "Molar heat capacity, at constant pressure, of the vapor. [Cp]:J/(mol*K)";
   parameter Real molecWeigth[:](  unit="Kg/mol") =  {18E-3} 
    "Molecular weigth of the water";
   parameter Real density[:](      unit="Kg/m3") =   {1E3} 
    "Density of liquid water";
  
   parameter Real molEnthalpyGRef[:](  unit="J/mol") = {-241.8322E3} 
    "Reference molar enthalpy of the vapor";
   parameter Real massEnthalpyLRef[:]( unit="J/Kg") =  {- 15.88E6} 
    "Reference enthalpy per mass unit of the liquid";
   parameter Real tempRef(          unit="K") =     298 
    "Enthalpy reference temperature";
  
   parameter Real Kprop(  unit="Kg/(s*K)") = 10 
    "Parameter of the boiling model";
  
   parameter Real Kvalve( unit="mol/(s*N/m**2)") =  ( 1.1E-7 / molecWeigth[1]) 
    "Valve coefficient";
  
   parameter Real pressDownStreamInitial(   unit="N/m**2") = 11 
    "Output pressure"; //1.2e5/101385 =1.18
   parameter Real tempDownStreamInitial(    unit="K") =       300 
    "Output temperature";
  
   parameter Real sectionInitial(      unit="m2") =   1 "Boiler cross-section";
   parameter Real vesselVolumeInitial( unit="m3") =   5.66 "Boiler volume";  //3
  
   parameter Real molVaporInitial[:](  unit="mol") =    {1273};  //1273
   parameter Real tempVaporInitial(    unit="K") =      463; //450
  
   parameter Real massWaterInitial[:]( unit="Kg") =      {2200};  //1600
   parameter Real tempWaterInitial(    unit="K") =       420; //420
  
   JARA2i.gas.semiPerfGasCp6B vapor(   nComp=1,perfGasConst=perfGasConst,CpCoefN=CpCoefNG,
                                     tempRef=tempRef,molEnthalpyRef=molEnthalpyGRef,
                                     molGinitial=molVaporInitial,tempGinitial=tempVaporInitial);
  
  JARA2i.CaseStudies.Boiler.VirtualLab.water water( nComp=1,CpCoefMInitial=CpCoefML,
      massEnthalpyRefInitial =                                                       massEnthalpyLRef,
                              tempRefInitial=tempRef,densityInitial=density,
      sectionInitial =                                                                     sectionInitial,
                              massLinitial=massWaterInitial,tempLinitial=tempWaterInitial);
  
   JARA2i.liq.vesselLiqB vessel(       vesselVolumeInitial=vesselVolumeInitial);
  
   PhysicalModel.waterBoil boil(            nComp=1,CpCoefML=CpCoefML,CpCoefNG=CpCoefNG,Kprop=Kprop,
                              molecWeigth=molecWeigth,molEnthalpyGRef=molEnthalpyGRef,
                              massEnthalpyLRef=massEnthalpyLRef,tempRef=tempRef);
  
   JARA2i.heat.sourceHeatFB heatSource(   nComp=1);
  
   valve valveG(      Kv=Kvalve,CpCoefN=CpCoefNG,molEnthalpyRef=molEnthalpyGRef,
                      tempRef=tempRef);
  
   PhysicalModel.pressDownStream outValvePress(   pressGinitial=pressDownStreamInitial,
      tempGinitial =                                                                   tempDownStreamInitial,
    atm=true);
  
   JARA2i.liq.sourceVolLiqFB liqSource(  nComp=1, densityInitial=density,
                                       CpCoefMInitial=CpCoefML,tempRefInitial=tempRef,pmax=1E8,
                                       pcodo=9.5E7,pmin=100, peps=50,
      massEnthalpyRefInitial =                                                               massEnthalpyLRef);
  
   sourceLiqCntrl sourceLiqCtrl;
  
equation 
   // Mass flow
  
   connect(   vapor.inMol, boil.outMol);
   connect(   water.inMassTop, boil.inMass);
   connect(   vapor.inMol,  valveG.inMol);
   connect(   outValvePress.inMol,  valveG.outMol);
   connect(   liqSource.inMass,   water.inMassBot);
   connect(   vapor.constraintV, vessel.constraintV);
   connect(   water.constraintV, vessel.constraintV);
   connect(   liqSource.setPointSignal,  sourceLiqCtrl.setPointSignal);
  connect(heatSource.inHeat, water.inHeat);
  
   // Volume constraint
  
   // Heat flow
  
   // Control signals
  
end steamPowerBoiler;

JARA2i.CaseStudies.Boiler.VirtualLab.valve

Valve

JARA2i.CaseStudies.Boiler.VirtualLab.valve

Information

Controller of the heat source

Parameters

Type Name Default Description

Integer nComp 1 Number of components

Real CpCoefN[nComp, 7] Coefficients of the molar heat capacity at constant pressure CpMol[i] = CpCoefN[i,1] + CpCoefN[i,2]*T + ... + CpCoefN[i,7]*T**6

Real eps 1.E-10 Small constant to avoid by-zero division

Real molEnthalpyRef[nComp] zeros(nComp) Molar enthalpy of the components at the reference temperature [M.L2.t-2.mol-1]

Real tempRef 298 Reference temperature for enthalpy [T]

Real Kv Valve parameter [mol.L.t.M-1]

Type	Name	Default	Description
Integer	nComp	1	Number of components
Real	CpCoefN[nComp, 7]		Coefficients of the molar heat capacity at constant pressure CpMol[i] = CpCoefN[i,1] + CpCoefN[i,2]T + ... + CpCoefN[i,7]T**6
Real	eps	1.E-10	Small constant to avoid by-zero division
Real	molEnthalpyRef[nComp]	zeros(nComp)	Molar enthalpy of the components at the reference temperature [M.L2.t-2.mol-1]
Real	tempRef	298	Reference temperature for enthalpy [T]
Real	Kv		Valve parameter [mol.L.t.M-1]

Connectors

Type Name Description

cutGasR inMol Gas flow - Connector Resistive.

cutGasR outMol Gas flow - Connector Resistive.

cutHeatFC inHeat Heat flow - Connector F-C. Connector for the heat convection.

cutEmitter cutEmitter

Type	Name	Description
cutGasR	inMol	Gas flow - Connector Resistive.
cutGasR	outMol	Gas flow - Connector Resistive.
cutHeatFC	inHeat	Heat flow - Connector F-C. Connector for the heat convection.
cutEmitter	cutEmitter

Modelica definition

model valve "Valve" 
  
   extends JARA2i.gas.convecGasFlowB(nComp=1);
  
   parameter Real Kv(    unit="mol.L.t.M-1") "Valve parameter";
  
   Real valveOpening(    min=0, max=1, start=1, fixed=true) "Valve opening";
  
  JARA2i.cutsB.cutEmitter cutEmitter(dim=1);
equation 
   der(valveOpening) = 0;
  
   cutEmitter.signal = {totalMolF};
  
   // Valve constitutive relation
   totalMolF = if inMol.pressG > outMol.pressG then 
                      valveOpening * Kv * sqrt( abs( inMol.pressG *  ( inMol.pressG  - outMol.pressG))) else 
                    - valveOpening * Kv * sqrt( abs( outMol.pressG * ( outMol.pressG - inMol.pressG)));
  
  
end valve;

JARA2i.CaseStudies.Boiler.VirtualLab.controlledSystem

Controlled system + 2 PID controllers

JARA2i.CaseStudies.Boiler.VirtualLab.controlledSystem

Information

Steam Power Boiler + Control system

This control system is composed of two decoupled control loops: (1) the water level inside the boiler is controlled by manipulating the pump throughput; and (2) the output flow of vapor is controlled by manipulating the heater power.

Parameters

Type	Name	Default	Description
Boolean	Ejs	true	Global variable - Runtime interactivity
Boolean	Sysquake	false	Global variable - Batch interactivity
Real	perfGasConst	8.31	Constant of the perfect gases [J/(mol*K)]
Real	CpCoefML[1, 7]	[4.18E3, 0, 0, 0, 0, 0, 0]	Heat capacity per mass unit of the liquid. [Cp]: J/(Kg*K)
Real	CpCoefNG[1, 7]	[55.486, 54.24E-3, 0, 0, 0, ...	Molar heat capacity, at constant pressure, of the vapor. [Cp]:J/(mol*K)
Real	molecWeigth[:]	{18E-3}	Molecular weigth of the water [Kg/mol]
Real	density[:]	{1E3}	Density of liquid water [Kg/m3]
Real	molEnthalpyGRef[:]	{-241.8322E3}	Reference molar enthalpy of the vapor [J/mol]
Real	massEnthalpyLRef[:]	{-15.88E6}	Reference enthalpy per mass unit of the liquid [J/Kg]
Real	tempRef	298	Enthalpy reference temperature [K]
Real	Kprop	10	Parameter of the boiling model [Kg/(s*K)]
Real	Kvalve	(1.1E-7/molecWeigth[1])	Valve coefficient [mol/(sN/m*2)]
Real	pressDownStreamInitial	11	Output pressure [N/m**2]
Real	tempDownStreamInitial	300	Output temperature [K]
Real	sectionInitial	1	Boiler cross-section [m2]
Real	vesselVolumeInitial	5.66	Boiler volume [m3]
Real	molVaporInitial[:]	{1273}	[mol]
Real	tempVaporInitial	463	[K]
Real	massWaterInitial[:]	{2200}	[Kg]
Real	tempWaterInitial	420	[K]

Modelica definition

model controlledSystem "Controlled system + 2 PID controllers" 
  extends steamPowerBoiler;
  
  auto.PIDLim pIDResistor(
    Tt0=1,
    samplePeriod0=1,
    Ti0=2.1,
    Td0=0.022,
    N0=1,
    Kp0=7e6,
    ulow0=0.00001,
    uhigh0=5e6);
  auto.PIDLim pIDWater(
    Tt0=1,
    samplePeriod0=1,
    Td0=0.1,
    Kp0=1,
    Ti0=9,
    ulow0=-0.02,
    uhigh0=0.02);
  SetPoint MolFSP(startSP=3.8);
  SetPoint waterSP(startSP=2);
  Switch switch;
  SetPoint heatFlow;
  SetPoint automatic;
  Switch switch1;
  SetPoint liqFlow(startSP=0);
equation 
  connect(valveG.cutEmitter, pIDResistor.yVarSignal);
  connect(switch.y, heatSource.setPointSignal);
  connect(water.cutEmitter, pIDWater.yVarSignal);
  connect(heatFlow.signal, switch.u3);
  connect(MolFSP.signal, pIDResistor.setPointSignal);
  connect(pIDWater.setPointSignal, waterSP.signal);
  connect(automatic.signal, switch1.u2);
  connect(switch.u2, automatic.signal);
  connect(switch.u1, pIDResistor.uVarSignal);
  connect(liqFlow.signal, switch1.u3);
  connect(pIDWater.uVarSignal, switch1.u1);
  connect(switch1.y, sourceLiqCtrl.cutReceiver);
end controlledSystem;

JARA2i.CaseStudies.Boiler.VirtualLab.SetPoint

Set-point

JARA2i.CaseStudies.Boiler.VirtualLab.SetPoint

Parameters

Type Name Default Description

Integer dim 1 Number of components of the signal vector

Real startSP 1

Type	Name	Default	Description
Integer	dim	1	Number of components of the signal vector
Real	startSP	1

Connectors

Type Name Description

cutEmitter signal Information

Type	Name	Description
cutEmitter	signal	Information

Modelica definition

model SetPoint "Set-point" 
               extends JARA2i.interf.emitter1I;
  parameter Real startSP = 1;
  Real setPoint(start = startSP);
equation 
   signal.signal[1] =  setPoint;
   der(setPoint) = 0;
end SetPoint;

JARA2i.CaseStudies.Boiler.VirtualLab.water

Water CV

JARA2i.CaseStudies.Boiler.VirtualLab.water

Parameters

Type Name Default Description

Integer nComp 1 Number of components

Boolean Ejs false Global parameter - Runtime interactivity

Boolean Sysquake false Global parameter - Batch interactivity

Real massLinitial[nComp] Initial condition - Mass inside the CV [M]

Real tempLinitial Initial condition - Temperature of the CV [T]

Real sectionInitial 1 Initial cross-section of the vessel [L2]

Real g 9.8 Gravitatorial acceleration [L.t-2]

Real angle 1.5707963 Angle with the horizontal [rad]

Real eps 1.E-6 Small constant to avoid by-zero division

Real CpCoefMInitial[nComp, 7] Coefficients of the specific (per mass) heat capacity CpM[i] = CpCoefM[i,1] + CpCoefM[i,2]*T + ... + CpCoefM[i,7]*T**6

Real densityInitial[nComp] Density of the pure components [M.L-3]

Real massEnthalpyRefInitial[nComp] zeros(nComp) Specific (per mass) enthalpy at the reference temperature [L2.t-2]

Real tempRefInitial 298 Reference temperature for the enthalpy [T]

Real percentVolSmallStep 0.9 Proportion of the vessel volume that triggers the reduction in the integration step-size

Real compressCoef 1.E-8 Numeric compressibility coefficient [L.t2.M-1]

Type	Name	Default	Description
Integer	nComp	1	Number of components
Boolean	Ejs	false	Global parameter - Runtime interactivity
Boolean	Sysquake	false	Global parameter - Batch interactivity
Real	massLinitial[nComp]		Initial condition - Mass inside the CV [M]
Real	tempLinitial		Initial condition - Temperature of the CV [T]
Real	sectionInitial	1	Initial cross-section of the vessel [L2]
Real	g	9.8	Gravitatorial acceleration [L.t-2]
Real	angle	1.5707963	Angle with the horizontal [rad]
Real	eps	1.E-6	Small constant to avoid by-zero division
Real	CpCoefMInitial[nComp, 7]		Coefficients of the specific (per mass) heat capacity CpM[i] = CpCoefM[i,1] + CpCoefM[i,2]T + ... + CpCoefM[i,7]T**6
Real	densityInitial[nComp]		Density of the pure components [M.L-3]
Real	massEnthalpyRefInitial[nComp]	zeros(nComp)	Specific (per mass) enthalpy at the reference temperature [L2.t-2]
Real	tempRefInitial	298	Reference temperature for the enthalpy [T]
Real	percentVolSmallStep	0.9	Proportion of the vessel volume that triggers the reduction in the integration step-size
Real	compressCoef	1.E-8	Numeric compressibility coefficient [L.t2.M-1]

Connectors

Type Name Description

cutLiquidC inMassTop Connector for the liquid flow

cutLiquidC inMassBot Connector for the liquid flow

cutHeatMC inHeat Connector for the heat flow

cutVolConstrLiq constraintV Connector for the volume constraint - Liquid

cutEmitter cutEmitter

Type	Name	Description
cutLiquidC	inMassTop	Connector for the liquid flow
cutLiquidC	inMassBot	Connector for the liquid flow
cutHeatMC	inHeat	Connector for the heat flow
cutVolConstrLiq	constraintV	Connector for the volume constraint - Liquid
cutEmitter	cutEmitter

Modelica definition

model water "Water CV" 
  
  extends JARA2i.liq.liquidCp6B;
  JARA2i.cutsB.cutEmitter cutEmitter( dim = 1);
equation 
  
  cutEmitter.signal[1] = fluidV;
end water;

JARA2i.CaseStudies.Boiler.VirtualLab.viewBoiler

Modelica description of the virtual-lab view

JARA2i.CaseStudies.Boiler.VirtualLab.viewBoiler

Modelica definition

model viewBoiler "Modelica description of the virtual-lab view" 
  import VirtualLabBuilder;
                   extends VirtualLabBuilder.VLabModels.PartialView( fileName = "boiler.java", Tcom = 0.05);
  Real deltaPipe;
  Real y0;
  Real h;
  VirtualLabBuilder.ViewElements.Containers.MainFrame mainFrame(Width=493, Height=770);
  VirtualLabBuilder.ViewElements.Drawables.Oval pumpTop(lineColorp={0,0,0,255}, fillColorp={0,0,0,255},
    intCenter=1);
  VirtualLabBuilder.ViewElements.Containers.DrawingPanel drawingPanel(
    XMin=-8,
    XMax=8,
    YMin=-0.5,
    YMax=1.5);
  VirtualLabBuilder.ViewElements.Drawables.Polygon pumpBase(
    lineColorp={0,0,0,255},
    fillColorp={0,0,0,255},
    nPoints=4,
    intVertexesX={1,1,1,1});
  VirtualLabBuilder.ViewElements.Drawables.Polygon boiler(filled="false", nPoints=8,
    intVertexesX=ones(8));
  VirtualLabBuilder.ViewElements.Drawables.Polygon resistor(
    nPoints=15,
    filled="false",
    closed="false");
  VirtualLabBuilder.ViewElements.Drawables.Polygon valveHandle(           fillColorp={0,0,0,255},
    nPoints=8,
    intVertexesX=ones(8));
  VirtualLabBuilder.ViewElements.Drawables.Polygon valve(nPoints=4, fillColorp={0,0,0,255},
    intVertexesX=ones(4));
  VirtualLabBuilder.ViewElements.Drawables.Oval PID1(filled="true", fillColorp={255,255,
        255,255},
    intCenter=1);
  VirtualLabBuilder.ViewElements.Drawables.Oval PID2(filled="true", fillColorp={255,255,
        255,255},
    intCenter=1);
  VirtualLabBuilder.ViewElements.Containers.Panel panelNorth(
    LayoutPolicy="GridLayout",
    position="NORTH",
    nRows=2,
    nColumns=4);
  VirtualLabBuilder.ViewElements.InteractiveControls.Slider waterM(
    minimum=2000,
    maximum=10000,
    stringFormat="waterM(kg) = 0",
    tickFormat="0");
  VirtualLabBuilder.ViewElements.InteractiveControls.Slider waterT(
    minimum=270,
    maximum=800,
    tickFormat="0.0",
    stringFormat="waterT (K) = 0.0");
  VirtualLabBuilder.ViewElements.InteractiveControls.Slider pressure(stringFormat="pressure (atm) = 0.0", maximum=30,
    tickNumber=10);
  VirtualLabBuilder.ViewElements.InteractiveControls.Slider volume(
    minimum=1,
    stringFormat="Boiler volume (m^3) = 0.0",
    maximum=8);
  VirtualLabBuilder.ViewElements.InteractiveControls.Slider opening(stringFormat="opening = 0.00",
      tickFormat="0.0");
  VirtualLabBuilder.ViewElements.BasicElements.Label label(text="Set Point", sizeOfFont=20,
    foreground={0,0,0,255});
  VirtualLabBuilder.ViewElements.InteractiveControls.Slider vaporMol(
    stringFormat="vaporMol = 0",
    tickFormat="0",
    maximum=2000);
  VirtualLabBuilder.ViewElements.InteractiveControls.Slider gasTemp(
    stringFormat="gasTemp (K) = 0.0",
    minimum=270,
    maximum=800,
    tickFormat="0.0");
  VirtualLabBuilder.ViewElements.Drawables.Polygon liquid(
    nPoints=6,
    lineColorp={0,0,255,255},
    fillColorp={0,0,255,255},
    intVertexesY={0,0,0,1,1,0},
    intVertexesX=ones(6));
  VirtualLabBuilder.ViewElements.InteractiveControls.Slider waterSP(
    maximum=3,
    tickFormat="0.0",
    stringFormat="waterSP(m^3) = 0.0");
  VirtualLabBuilder.ViewElements.InteractiveControls.Slider vaporMolSP(
    stringFormat="vaporMol = 0",
    tickFormat="0",
    minimum=0,
    maximum=20);
  VirtualLabBuilder.ViewElements.Drawables.Polygon line1(
    nPoints=4,
    filled="false",
    lineColorp={0,0,0,255},
    closed="false",
    intVertexesX={1,0,0,0});
  VirtualLabBuilder.ViewElements.Drawables.Polygon line2(
    nPoints=4,
    filled="false",
    closed="false",
    intVertexesX={1,0,0,0});
  VirtualLabBuilder.ViewElements.Containers.Dialog dialog(
    yPosition=400,
    Width=390,
    LayoutPolicy="GridLayout",
    nRows=8,
    nColumns=2,
    Height=500,
    varName="ctrl",
    xPosition=493);
  VirtualLabBuilder.ViewElements.InteractiveControls.Slider Kp1(
    minimum=0,
    stringFormat="Kp1 = 0",
    tickFormat="0",
    tickNumber=3,
    maximum=1e7);
  VirtualLabBuilder.ViewElements.InteractiveControls.Slider Kp2(
    minimum=0,
    stringFormat="Kp2 = 0.0",
    tickFormat="0.0",
    tickNumber=10,
    maximum=2);
  VirtualLabBuilder.ViewElements.InteractiveControls.Slider Ti1(
    stringFormat="Ti1= 0.0",
    tickFormat="0.0",
    minimum=1,
    maximum=10);
  VirtualLabBuilder.ViewElements.InteractiveControls.Slider Ti2(
    minimum=1,
    maximum=10,
    stringFormat="Ti2 = 0.0",
    tickFormat="0.0");
  VirtualLabBuilder.ViewElements.InteractiveControls.Slider Td1(
    stringFormat="Td1 = 0.0",
    tickFormat="0.0",
    maximum=100,
    tickNumber=3);
  VirtualLabBuilder.ViewElements.InteractiveControls.Slider Td2(stringFormat="Td2 = 0.00");
  VirtualLabBuilder.ViewElements.InteractiveControls.Slider N1(
    stringFormat="N1 = 0",
    tickFormat="0.0",
    maximum=100,
    tickNumber=3);
  VirtualLabBuilder.ViewElements.InteractiveControls.Slider N2(
    stringFormat="N2 = 0",
    tickFormat="0.0",
    maximum=100,
    tickNumber=3);
  VirtualLabBuilder.ViewElements.InteractiveControls.Slider Tt1(
    stringFormat="Tt1 = 0.0",
    maximum=100,
    tickFormat="0.0",
    tickNumber=3);
  VirtualLabBuilder.ViewElements.InteractiveControls.Slider Tt2(
    stringFormat="Tt2 = 0.0",
    tickFormat="0.0",
    maximum=100,
    tickNumber=3);
  VirtualLabBuilder.ViewElements.InteractiveControls.Slider B1(
    stringFormat="B1 = 0.0",
    tickFormat="0.0",
    maximum=2);
  VirtualLabBuilder.ViewElements.InteractiveControls.Slider B2(
    stringFormat="B2 = 0.0",
    tickFormat="0.0",
    maximum=2);
  VirtualLabBuilder.ViewElements.InteractiveControls.Slider ulow1(
    minimum=-10,
    maximum=0,
    tickFormat="0.0",
    stringFormat="ulow1=0.00");
  VirtualLabBuilder.ViewElements.InteractiveControls.Slider ulow2(
    maximum=1e6,
    stringFormat="ulow2 = 0",
    tickFormat="0",
    tickNumber=3);
  VirtualLabBuilder.ViewElements.InteractiveControls.Slider uhigh1(
    maximum=10,
    tickFormat="0.0",
    stringFormat="uhigh1 = 0.00");
  VirtualLabBuilder.ViewElements.InteractiveControls.Slider uhigh2(
    stringFormat="uhigh=0",
    minimum=0.1,
    maximum=1e7,
    tickFormat="0",
    tickNumber=3);
  VirtualLabBuilder.ViewElements.Drawables.Text C1text(textString="C1", intCenter=1);
  VirtualLabBuilder.ViewElements.Drawables.Text C2text(textString="C2", intCenter=1);
  VirtualLabBuilder.ViewElements.Drawables.Arrow arrow(intOrigin=1, intStroke=1);
  VirtualLabBuilder.ViewElements.InteractiveControls.RadioButton automatic(text="automatic");
  VirtualLabBuilder.ViewElements.InteractiveControls.RadioButton manual(buttonValue="false", text=
       "manual");
  VirtualLabBuilder.ViewElements.InteractiveControls.Slider heatFlow(
    tickFormat="0",
    tickNumber=3,
    maximum=1e7,
    stringFormat="heatFlow (W) = 0");
  VirtualLabBuilder.ViewElements.InteractiveControls.Slider liqFlow(
    minimum=-0.02,
    maximum=0.02,
    tickNumber=3,
    stringFormat="liquid (m^3/s) = 0.0");
  VirtualLabBuilder.ViewElements.Containers.Panel panelSouth(
    LayoutPolicy="GridLayout",
    nColumns=2,
    nRows=5);
  VirtualLabBuilder.ViewElements.Containers.Dialog dialog1(
    LayoutPolicy="GridLayout",
    nRows=2,
    nColumns=2,
    Width=600,
    Height=600,
    varName="plots",
    xPosition=493);
  VirtualLabBuilder.ViewElements.Containers.PlottingPanel plottingPanel(
    autoScaleY="false",
    titleX="time (s)",
    title="Total molar flow (mols/s)",
    maxY=8);
  VirtualLabBuilder.ViewElements.Containers.PlottingPanel plottingPanel1(
    autoScaleY="false",
    maxY=3,
    title="Liquid Volume ( m**3 )");
  VirtualLabBuilder.ViewElements.Containers.PlottingPanel plottingPanel2(
    autoScaleY="false",
    minY=-1e6,
    maxY=6e6,
    title="Heat Flow (J/s)",
    titleX="time (s)");
  VirtualLabBuilder.ViewElements.Containers.PlottingPanel plottingPanel3(
    autoScaleY="false",
    minY=-5,
    title="Total mass flow (Kg/s)",
    maxY=30);
  VirtualLabBuilder.ViewElements.Drawables.Trail trailMol(nSkip=1);
  VirtualLabBuilder.ViewElements.Drawables.Trail trailMolSP(lineColor={255,0,0,255}, nSkip=1);
  VirtualLabBuilder.ViewElements.Drawables.Trail trailFluid(nSkip=1);
  VirtualLabBuilder.ViewElements.Drawables.Trail trailFluidSP(lineColor={255,0,0,255}, nSkip=1);
  VirtualLabBuilder.ViewElements.Drawables.Trail trailHeat(nSkip=1);
  VirtualLabBuilder.ViewElements.Drawables.Trail trailMass(nSkip=1);
  VirtualLabBuilder.ViewElements.BasicElements.CheckBox checkBox(varName="ctrl", label=
        "control param. ");
  VirtualLabBuilder.ViewElements.BasicElements.CheckBox checkBox1(label="Show plots",
      varName="plots");
  VirtualLabBuilder.ViewElements.BasicElements.PauseButton pauseButton;
  VirtualLabBuilder.ViewElements.BasicElements.InfoButton infoButton(path=
        "D:\\ModelicaLibraries\\JARA\\boilerIntroduction.html", image=
        "D:\\ModelicaLibraries\\JARA\\boilerIntroduction_archivos\\info.jpgl");
equation 
resistor.x[1] = 0.6;
  
                     resistor.y[1] = -0.1;
resistor.x[2] = 0.6;
                     resistor.y[2] = 0;
resistor.x[3] = 0.5414;
                        resistor.y[3] =0.1414;
resistor.x[4] = 0.4;
                     resistor.y[4] = 0.2;
resistor.x[5] = 0.2586;
                        resistor.y[5] = 0.1414;
resistor.x[6] = 0.2;
                     resistor.y[6] = 0;
resistor.x[7] = 0.1414;
                        resistor.y[7] = 0.1414;
resistor.x[8] = 0;
                   resistor.y[8] = 0.2;
resistor.x[9] = -0.1414;
                         resistor.y[9] = 0.1414;
resistor.x[10] = -0.2;
                       resistor.y[10] = 0;
resistor.x[11] = -0.2586;
                          resistor.y[11] = 0.1414;
resistor.x[12] = -0.4;
                       resistor.y[12] = 0.2;
resistor.x[13] = -0.5414;
                          resistor.y[13] =0.1414;
resistor.x[14] = -0.6;
                       resistor.y[14] = 0;
resistor.x[15] = -0.6;
                       resistor.y[15] = -0.1;
  
y0 = (2)/4-0.5;
h = 1;
deltaPipe = (h-y0)*0.2;
  
boiler.y[1] = y0;
boiler.y[2] = y0 + deltaPipe/2;
boiler.y[3] = boiler.y[2];
boiler.y[4] = y0+h;
boiler.y[5] = boiler.y[4];
boiler.y[6] = boiler.y[5]-deltaPipe/2;
boiler.y[7] = boiler.y[6];
boiler.y[8] = boiler.y[1];
  
liquid.y[1] = boiler.y[1];
liquid.y[2] = boiler.y[2];
liquid.y[3] = boiler.y[3];
liquid.y[6] = boiler.y[8];
  
pumpTop.Center[2] = y0+deltaPipe/2;
pumpTop.Axes[1] = 3*deltaPipe;
pumpTop.Axes[2] = 1.5*deltaPipe;
  
pumpBase.y[1] = y0-deltaPipe/2;
pumpBase.y[2] = y0;
pumpBase.y[3] = pumpBase.y[2];
pumpBase.y[4] = pumpBase.y[1];
  
PID1.Center[1] = -5;
PID1.Center[2] = 0.5;
PID1.Axes[1] = 1;
PID1.Axes[2] = 0.15;
  
PID2.Center[1] = 5;
PID2.Center[2] = 0.5;
PID2.Axes[1] = 1;
PID2.Axes[2] = 0.15;
C1text.Center[1] = PID1.Center[1];
C2text.Center[1] = PID2.Center[1];
C1text.Center[2] = PID1.Center[2]*0.95;
C2text.Center[2] = PID2.Center[2]*0.95;
  
valveHandle.y[1] = y0+h-deltaPipe/8;
valveHandle.y[2] = y0+h+deltaPipe/4+deltaPipe/4;
valveHandle.y[3] = valveHandle.y[2];
valveHandle.y[4] = valveHandle.y[3] + deltaPipe/4+deltaPipe/4;
valveHandle.y[5] = valveHandle.y[4];
valveHandle.y[6] = valveHandle.y[3];
valveHandle.y[7] = valveHandle.y[6];
valveHandle.y[8] = valveHandle.y[1];
  
valve.y[1] =h-deltaPipe-deltaPipe*0.1+deltaPipe/4;
valve.y[2] = h+deltaPipe*0.1+deltaPipe/4;
valve.y[3] = valve.y[1];
valve.y[4] = valve.y[2];
  
   arrow.stroke = 5;
  connect(root.cLLeft, mainFrame.pLLeft);
  connect(mainFrame.cLLeft, dialog.pLLeft);
  connect(dialog.cLLeft, dialog1.pLLeft);
  connect(mainFrame.cLRight, drawingPanel.pLLeft);
  connect(drawingPanel.cRight, line1.pLeft);
  connect(line1.cLeft, line2.pLeft);
  connect(line2.cLeft, pumpBase.pLeft);
  connect(pumpBase.cLeft, liquid.pLeft);
  connect(liquid.cLeft, boiler.pLeft);
  connect(boiler.cLeft, valveHandle.pLeft);
  connect(valveHandle.cLeft, valve.pLeft);
  connect(valve.cLeft, PID1.pLeft);
  connect(PID1.cLeft, PID2.pLeft);
  connect(PID2.cLeft, resistor.pLeft);
  connect(resistor.cLeft, pumpTop.pLeft);
  connect(pumpTop.cLeft, C1text.pLeft);
  connect(C1text.cLeft, C2text.pLeft);
  connect(C2text.cLeft, arrow.pLeft);
  connect(panelNorth.cLRight, checkBox.pLLeft);
  connect(checkBox.cLLeft, automatic.pLLeft);
  connect(manual.cLLeft, checkBox1.pLLeft);
  connect(checkBox1.cLLeft, heatFlow.pLLeft);
  connect(heatFlow.cLLeft, liqFlow.pLLeft);
  connect(liqFlow.cLLeft, pauseButton.pLLeft);
  connect(pauseButton.cLLeft, infoButton.pLLeft);
  connect(pressure.pLLeft, panelSouth.cLRight);
  connect(pressure.cLLeft, volume.pLLeft);
  connect(volume.cLLeft, opening.pLLeft);
  connect(opening.cLLeft, waterM.pLLeft);
  connect(waterM.cLLeft, label.pLLeft);
  connect(waterT.cLLeft, waterSP.pLLeft);
  connect(waterSP.cLLeft, vaporMol.pLLeft);
  connect(vaporMol.cLLeft, vaporMolSP.pLLeft);
  connect(gasTemp.pLLeft, vaporMolSP.cLLeft);
  connect(label.cLLeft, waterT.pLLeft);
  connect(plottingPanel.cRight, trailMol.pLeft);
  connect(trailMol.cLeft, trailMolSP.pLeft);
  connect(plottingPanel1.cRight, trailFluid.pLeft);
  connect(trailFluid.cLeft, trailFluidSP.pLeft);
  connect(plottingPanel2.cRight, trailHeat.pLeft);
  connect(plottingPanel3.cRight, trailMass.pLeft);
  connect(dialog1.cLRight, plottingPanel.pLLeft);
  connect(plottingPanel.cLLeft, plottingPanel1.pLLeft);
  connect(plottingPanel1.cLLeft, plottingPanel2.pLLeft);
  connect(plottingPanel2.cLLeft, plottingPanel3.pLLeft);
  connect(drawingPanel.cLLeft, panelNorth.pLLeft);
  connect(panelNorth.cLLeft, panelSouth.pLLeft);
  connect(dialog.cLRight, Kp1.pLLeft);
  connect(Kp1.cLLeft, Kp2.pLLeft);
  connect(Kp2.cLLeft, Ti1.pLLeft);
  connect(Ti1.cLLeft, Ti2.pLLeft);
  connect(Ti2.cLLeft, Td1.pLLeft);
  connect(Td1.cLLeft, Td2.pLLeft);
  connect(Td2.cLLeft, N1.pLLeft);
  connect(N1.cLLeft, N2.pLLeft);
  connect(N2.cLLeft, Tt1.pLLeft);
  connect(Tt1.cLLeft, Tt2.pLLeft);
  connect(Tt2.cLLeft, B1.pLLeft);
  connect(B1.cLLeft, B2.pLLeft);
  connect(B2.cLLeft, ulow1.pLLeft);
  connect(ulow1.cLLeft, ulow2.pLLeft);
  connect(ulow2.cLLeft, uhigh1.pLLeft);
  connect(uhigh1.cLLeft, uhigh2.pLLeft);
  connect(automatic.cLLeft, manual.pLLeft);
end viewBoiler;

JARA2i.CaseStudies.Boiler.VirtualLab.Interactive

Modelica description of the virtual-lab

Modelica definition

model Interactive "Modelica description of the virtual-lab" 
  
  VirtualLabBuilder.VLabModels.VirtualLab interactive(redeclare model ViewI = 
        viewBoiler, redeclare model ModelI = controlledSystem,
    fileName="boiler.java",
    Tcom=0.05);
  
  Real manual;
equation 
    interactive.View.boiler.x[1] = -interactive.Model.vessel.vesselVolume/2-5*interactive.View.deltaPipe;
    interactive.View.boiler.x[2] = interactive.View.boiler.x[1];
    interactive.View.boiler.x[3] = -interactive.Model.vessel.vesselVolume/2;
    interactive.View.boiler.x[4] = interactive.View.boiler.x[3];
    interactive.View.boiler.x[5] = -interactive.View.boiler.x[1];
    interactive.View.boiler.x[6] = interactive.View.boiler.x[5];
    interactive.View.boiler.x[7] = interactive.Model.vessel.vesselVolume/2;
    interactive.View.boiler.x[8] = interactive.View.boiler.x[7];
  
    interactive.View.arrow.Origin[1] = interactive.View.boiler.x[3]-1;
    interactive.View.arrow.Origin[2] = interactive.Model.waterSP.setPoint/interactive.View.h/interactive.Model.vessel.vesselVolume+interactive.View.boiler.y[1];
    interactive.View.arrow.Length[1] = 1;
    interactive.View.arrow.Length[2] = 0;
  
    interactive.View.line1.x[1] = interactive.View.boiler.x[3];
    interactive.View.line1.x[2] = interactive.View.PID1.Center[1];
    interactive.View.line1.x[3] =  interactive.View.line1.x[2];
    interactive.View.line1.x[4] = interactive.View.pumpTop.Center[1];
    interactive.View.line1.y[1] = interactive.View.h/2;
    interactive.View.line1.y[2] =interactive.View.line1.y[1];
    interactive.View.line1.y[3] =  interactive.View.pumpTop.Center[2];
    interactive.View.line1.y[4] = interactive.View.line1.y[3];
  
    interactive.View.line2.x[1] = interactive.View.valveHandle.x[2];
    interactive.View.line2.x[2] = interactive.View.PID2.Center[1];
    interactive.View.line2.x[3] =  interactive.View.line2.x[2];
    interactive.View.line2.x[4] = interactive.View.resistor.x[1];
    interactive.View.line2.y[1] = interactive.View.valveHandle.y[2];
    interactive.View.line2.y[2] =interactive.View.line2.y[1];
    interactive.View.line2.y[3] =   interactive.View.resistor.y[1];
    interactive.View.line2.y[4] = interactive.View.line2.y[3];
  
    interactive.View.liquid.x[1] = interactive.View.boiler.x[1];
    interactive.View.liquid.x[2] = interactive.View.boiler.x[2];
    interactive.View.liquid.x[3] = interactive.View.boiler.x[3];
    interactive.View.liquid.x[4] = interactive.View.boiler.x[3];
    interactive.View.liquid.x[5] = interactive.View.boiler.x[7];
    interactive.View.liquid.x[6] = interactive.View.boiler.x[8];
  
    interactive.View.liquid.y[4] = interactive.Model.water.fluidV/interactive.View.h/interactive.Model.vessel.vesselVolume;
    interactive.View.liquid.y[5] = interactive.View.liquid.y[4];
  
    interactive.View.pumpTop.Center[1] = interactive.View.boiler.x[1];
  
    interactive.View.pumpBase.x[1] = interactive.View.boiler.x[1]-interactive.View.deltaPipe*1.4;  //Corregir
    interactive.View.pumpBase.x[2] = interactive.View.boiler.x[1]-1.1*interactive.View.deltaPipe/2;
    interactive.View.pumpBase.x[3] = interactive.View.boiler.x[1]+1.1*interactive.View.deltaPipe/2;  //Corregir
    interactive.View.pumpBase.x[4] = interactive.View.boiler.x[1]+interactive.View.deltaPipe*1.4;
  
    interactive.View.valveHandle.x[1] = interactive.View.boiler.x[7]+2*interactive.View.deltaPipe;  //Corregir    
    interactive.View.valveHandle.x[2] = interactive.View.valveHandle.x[1];
    interactive.View.valveHandle.x[3] = interactive.View.boiler.x[7]+1.7*interactive.View.deltaPipe;  //Corregir
    interactive.View.valveHandle.x[4] = interactive.View.valveHandle.x[3];
    interactive.View.valveHandle.x[5] = interactive.View.boiler.x[7]+2.3*interactive.View.deltaPipe;  //Corregir
    interactive.View.valveHandle.x[6] = interactive.View.valveHandle.x[5];
    interactive.View.valveHandle.x[7] = interactive.View.boiler.x[7]+2.0*interactive.View.deltaPipe;  //Corregir
    interactive.View.valveHandle.x[8] = interactive.View.valveHandle.x[7];
  
    interactive.View.valve.x[1] = interactive.View.boiler.x[7]+1*interactive.View.deltaPipe;  //Corregir    
    interactive.View.valve.x[2] = interactive.View.boiler.x[7]+3*interactive.View.deltaPipe;
    interactive.View.valve.x[3] = interactive.View.valve.x[2];  //Corregir
    interactive.View.valve.x[4] = interactive.View.valve.x[1];
  
    interactive.View.pressure.var = interactive.Model.outValvePress.pressG;
    interactive.View.volume.var = interactive.Model.vessel.vesselVolume;
    interactive.View.opening.var = interactive.Model.valveG.valveOpening;
    interactive.View.waterM.var = interactive.Model.water.massL[1];
    interactive.View.waterT.var = interactive.Model.water.tempL;
    interactive.View.vaporMolSP.var = interactive.Model.MolFSP.setPoint;
    interactive.View.vaporMol.var = interactive.Model.vapor.molG[1];
    interactive.View.gasTemp.var = interactive.Model.vapor.tempG;
    interactive.View.waterSP.var = interactive.Model.waterSP.setPoint;
  
    interactive.View.Kp1.var = interactive.Model.pIDResistor.Kp;
  
    interactive.View.Kp2.var = interactive.Model.pIDWater.Kp;
  
    interactive.View.Ti1.var = interactive.Model.pIDResistor.Ti;
  
    interactive.View.Ti2.var = interactive.Model.pIDWater.Ti;
  
    interactive.View.Td1.var = interactive.Model.pIDResistor.Td;
  
    interactive.View.Td2.var = interactive.Model.pIDWater.Td;
  
    interactive.View.N1.var = interactive.Model.pIDResistor.N;
  
    interactive.View.N2.var = interactive.Model.pIDWater.N;
  
    interactive.View.Tt1.var = interactive.Model.pIDResistor.Tt;
    interactive.View.Tt2.var = interactive.Model.pIDWater.Tt;
  
    interactive.View.B1.var = interactive.Model.pIDResistor.B;
  
    interactive.View.B2.var = interactive.Model.pIDWater.B;
  
    interactive.View.ulow1.var = interactive.Model.pIDResistor.ulow;
    interactive.View.ulow2.var = interactive.Model.pIDWater.ulow;
  
    interactive.View.uhigh1.var = interactive.Model.pIDResistor.uhigh;
  
    interactive.View.uhigh2.var = interactive.Model.pIDWater.uhigh;
  
    interactive.View.automatic.var = interactive.Model.automatic.setPoint;
  
    interactive.View.manual.var = manual;
  
    interactive.View.heatFlow.var = interactive.Model.heatFlow.setPoint;
  
    interactive.View.liqFlow.var = interactive.Model.liqFlow.setPoint;
  
    interactive.View.trailMol.point = {time, interactive.Model.valveG.totalMolF};
    interactive.View.trailMolSP.point = {time, interactive.Model.MolFSP.setPoint};
    interactive.View.trailFluid.point = {time, interactive.Model.water.fluidV};
    interactive.View.trailFluidSP.point = {time, interactive.Model.waterSP.setPoint};
    interactive.View.trailHeat.point = {time, interactive.Model.heatSource.heatFSP};
    interactive.View.trailMass.point = {time, interactive.Model.liqSource.totalMassF};
  
    der(manual) = 0;
end Interactive;

JARA2i.CaseStudies.Boiler.VirtualLab.Switch

Switch between two Real signals

JARA2i.CaseStudies.Boiler.VirtualLab.Switch

Information

The Logical.Switch switches, depending on the logical connector u2 (the middle connector) between the two possible input signals u1 (upper connector) and u3 (lower connector).

If u2 is true, the output signal y is set equal to u1, else it is set equal to u3.

Connectors

Type Name Description

cutReceiver u1

cutReceiver u2

cutReceiver u3

cutEmitter y

Type	Name	Description
cutReceiver	u1
cutReceiver	u2
cutReceiver	u3
cutEmitter	y

Modelica definition

model Switch "Switch between two Real signals" 
  
  JARA2i.cutsB.cutReceiver u1( dim = 1);
  JARA2i.cutsB.cutReceiver u2( dim = 1);
  JARA2i.cutsB.cutReceiver u3( dim = 1);
  JARA2i.cutsB.cutEmitter y( dim = 1);
  
equation 
  y.signal[1] = if u2.signal[1]>0.5 then u1.signal[1] else u3.signal[1];
end Switch;

HTML-documentation generated by Dymola Tue Jul 24 19:08:10 2007.