VirtualLabBuilder.Examples.BBall

Bouncing ball

Information


 

BBall package

 
BBall package includes the description of the bouncing-ball virtual-lab.
The BBModel has been extracted from (Dynasim 2004) and have been adapted for interactive simulation.



References


Dynasim (2004): Dymola. User's Manual. Dynasim AB.Version 5.3a.

 



Package Content




NameDescription


BBModel
Virtual-lab model


VirtualLabBuilder.Examples.BBall.BBView BBView
Virtual-lab view description


BBInteractive
Interactive model








VirtualLabBuilder.Examples.BBall.BBModel

Virtual-lab model


Information





 
This model has been extracted from (Dynasim 2004).
It has been adapted for interactive simulation.
The interactive variables of the models are shown in Table 1.


 
Table 1. Interactive variables.



x
Ball position.
  

v
Ball velocity.
  

ebounce
Ellasticity coefficient.
  

  



References


Dynasim (2004): Dymola. User's Manual. Dynasim AB.Version 5.3a.

 
    


Parameters




TypeNameDefaultDescription


HeightxStart10[m]


VelocityvStart0[m/s]


Massm2[kg]


RealebounceIni0.8Initial value of the ellasticity coefficient


Realvsmall1e-4 




Modelica definition


model BBModel "Virtual-lab model" 
  import Modelica.SIunits;
  parameter SIunits.Height xStart = 10;
  parameter SIunits.Velocity vStart = 0;
  
  SIunits.Height x(start=xStart, stateSelect = StateSelect.always);
  SIunits.Velocity v(start = vStart);
  
  SIunits.Force f;
  parameter SIunits.Mass m=2;
  
  parameter Real ebounceIni=0.8 "Initial value of the ellasticity coefficient"; //Code added 
  
  Real ebounce( start = ebounceIni); //Code added 
  
  Real var( start = 0); //Code added
  parameter Real vsmall = 1e-4;
  Boolean locked(start = false);
equation 
 der(x)=v;
 m*der(v)= f;
 f=if locked then 0 else -m*Modelica.Constants.g_n;
 when (x<0 or locked) then
  reinit(x,0);
  reinit(v, if locked then 0 else  -ebounce*v);
    
 end when;
  
 der(ebounce) = 0; //Code added 
 der(var) = 0; //Code added
locked=if pre(locked) then x<=0 else x<=0 and 
abs(v)<=vsmall and f<=0;
 when var>0.5 then
  reinit(x,xStart);
  reinit(v,vStart);
 end when;
end BBModel;







VirtualLabBuilder.Examples.BBall.BBView
VirtualLabBuilder.Examples.BBall.BBView

Virtual-lab view description

VirtualLabBuilder.Examples.BBall.BBView

Information





 
This model has been composed by extending the PartialView class 
and by instantiating and connecting the required components of the VirtualLabBuilder library.
The connection rules are described in the documentation of the ViewElements package. 
 
    


Parameters




TypeNameDefaultDescription


RealTcom0.1Communication interval


IntegerserverPort4242Server Port number


StringsourceCodePath"C:/Program Files/Dymola/Sou...Path where the C-functions, graphics.jar and delayrun.exe are located


StringfileName"gui.java"Java file name




Modelica definition


model BBView "Virtual-lab view description" 
             extends VirtualLabBuilder.VLabModels.PartialView(fileName = "BBall.java");
  
  
  VirtualLabBuilder.ViewElements.Containers.PlottingPanel PP(
      axesType="cartesian1",
      title="Ball",
      titleX="time (s)",
      titleY="x(t)",
      autoScaleY="false",
      maxY=12,
      position="CENTER");
  VirtualLabBuilder.ViewElements.Containers.Dialog D(varName="var",
        xPosition=600);
  VirtualLabBuilder.ViewElements.Containers.MainFrame MF(LayoutPolicy=
          "BorderLayout()", Width=600);
  VirtualLabBuilder.ViewElements.Containers.DrawingPanel DP(
      YMin=0,
      position="CENTER",
      YMax=12);
  VirtualLabBuilder.ViewElements.Containers.Panel pNorth(
    LayoutPolicy="GridLayout",
    position="NORTH",
      nRows=1,
      nColumns=4);
  VirtualLabBuilder.ViewElements.BasicElements.CheckBox checkBox(label="Show plot");
    VirtualLabBuilder.ViewElements.Drawables.Trail trail(nSkip=0,
        maximumPoints=2000);
    VirtualLabBuilder.ViewElements.BasicElements.InfoButton infoButton(
      tooltip="Displays the introduction of the lab",
      sizeFont=20,
      path="D:\\VisualizacionDymola\\BouncingBall\\BBModel.html",
      title="Introduction",
      xPos=600,
      image="D:\\VisualizacionDymola\\BouncingBall\\info.jpg",
      label="Info");
    VirtualLabBuilder.ViewElements.InteractiveControls.Button1Action reset(label="Reset", tooltip=
          "Reset");
    src.ViewElements.InteractiveControls.Slider slider(stringFormat=
          "ebounce = 0.0");
    src.ViewElements.Drawables.Oval oval(intCenter=1);
equation 
  
    connect(slider.cLLeft, checkBox.pLLeft);
    connect(checkBox.cLLeft, infoButton.pLLeft);
    connect(infoButton.cLLeft, reset.pLLeft);
    connect(root.cLLeft, MF.pLLeft);
    connect(pNorth.cLRight, slider.pLLeft);
    connect(pNorth.cLLeft, DP.pLLeft);
    connect(MF.cLLeft, D.pLLeft);
    connect(MF.cLRight, pNorth.pLLeft);
    connect(DP.cRight, oval.pLeft);
    connect(PP.cRight, trail.pLeft);
    connect(D.cLRight, PP.pLLeft);
end BBView;







VirtualLabBuilder.Examples.BBall.BBInteractive

Interactive model


Information





 
This model has been composed by instantiating the VirtualLab Model,
which is included in the VirtualLabBuilder library.
The BBInteractive model includes the equations required to link the model and the view variables.
 
 
    


Modelica definition


model BBInteractive "Interactive model" 
  
  VirtualLabBuilder.VLabModels.VirtualLab interactive(redeclare model ViewI = 
        BBView, redeclare model ModelI = BBModel,
      Tcom=0.001);
equation 
  
 interactive.View.oval.Center = {0.0, interactive.Model.x};
 interactive.View.oval.Axes = {0.1, 1};
  
 interactive.View.trail.point = {time, interactive.Model.x};
 interactive.View.slider.var = interactive.Model.ebounce;
 interactive.View.reset.var = interactive.Model.var;
  
end BBInteractive;





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