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Diffstat (limited to 'PID_Practice_Cases/tank_model.mo')
| -rw-r--r-- | PID_Practice_Cases/tank_model.mo | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/PID_Practice_Cases/tank_model.mo b/PID_Practice_Cases/tank_model.mo new file mode 100644 index 0000000..8e57dc9 --- /dev/null +++ b/PID_Practice_Cases/tank_model.mo @@ -0,0 +1,205 @@ +model tank_model + package Medium = Modelica.Media.Water.ConstantPropertyLiquidWater; + + Modelica.Fluid.Examples.ControlledTankSystem.Utilities.TankController + tankController( + waitTime=50, + maxLevel=0.9*tank1.height, + minLevel=0.01) + annotation (Placement(transformation(extent={{-60,-20},{-20,20}}))); + Modelica.Fluid.Examples.ControlledTankSystem.Utilities.RadioButton start( + reset={stop.on,shut.on}, + buttonTimeTable={20,280}) + annotation (Placement(transformation(extent={{-100,20},{-80,40}}))); + Modelica.Fluid.Examples.ControlledTankSystem.Utilities.RadioButton stop( + reset={start.on,shut.on}, + buttonTimeTable={220,650}) + annotation (Placement(transformation(extent={{-100,-10},{-80,10}}))); + Modelica.Fluid.Examples.ControlledTankSystem.Utilities.RadioButton shut( + reset={start.on,stop.on}, + buttonTimeTable={700}) + annotation (Placement(transformation(extent={{-100,-40},{-80,-20}}))); + Modelica.Fluid.Valves.ValveDiscrete valve1( redeclare + package Medium = Medium, + m_flow_nominal=40, + dp_nominal=100000) + annotation (Placement(transformation( + origin={-10,70}, + extent={{10,-10},{-10,10}}, + rotation=180))); + Modelica.Fluid.Vessels.OpenTank tank1( + level_start=0.05, + redeclare package Medium = Medium, + crossArea=6, + height=4, + nPorts=2, + portsData={Modelica.Fluid.Vessels.BaseClasses.VesselPortsData( + diameter=0.2, + height=4, + zeta_out=0, + zeta_in=1),Modelica.Fluid.Vessels.BaseClasses.VesselPortsData( + diameter=0.2, + height=0, + zeta_out=0, + zeta_in=1)}) annotation (Placement(transformation(extent={{10,30}, + {50,70}}))); + Modelica.Blocks.Sources.RealExpression level1(y=tank1.level) + annotation (Placement(transformation(extent={{-90,-60},{-55,-40}}))); + Modelica.Fluid.Valves.ValveDiscrete valve2( redeclare package Medium + = Medium, + dp_nominal(displayUnit="Pa") = 1, + m_flow_nominal=100) + annotation (Placement(transformation( + origin={34,0}, + extent={{10,-10},{-10,10}}, + rotation=90))); + Modelica.Fluid.Valves.ValveDiscrete valve3( redeclare package Medium + = Medium, + dp_nominal(displayUnit="Pa") = 1, + m_flow_nominal=10) + annotation (Placement(transformation( + origin={35,-80}, + extent={{10,-10},{-10,10}}))); + Modelica.Fluid.Vessels.OpenTank tank2( + level_start=0.05, + redeclare package Medium = Medium, + height=5, + crossArea=6, + nPorts=2, + portsData={Modelica.Fluid.Vessels.BaseClasses.VesselPortsData( + diameter=0.2, + height=5, + zeta_out=0, + zeta_in=1),Modelica.Fluid.Vessels.BaseClasses.VesselPortsData( + diameter=0.2, + height=0, + zeta_out=0, + zeta_in=1)}) annotation (Placement(transformation(extent={{50,-60}, + {90,-20}}))); + Modelica.Fluid.Sources.Boundary_pT ambient1(redeclare package Medium = + Medium,nPorts=1, + p=system.p_ambient, + T=system.T_ambient) + annotation (Placement(transformation(extent={{-10,-90},{10,-70}}))); + Modelica.Blocks.Sources.RealExpression level2(y=tank2.level) + annotation (Placement(transformation(extent={{-70,-80},{-33,-60}}))); + Modelica.Fluid.Sources.Boundary_pT source(redeclare package Medium = + Medium, p=2.5e6,nPorts=1, + T=system.T_ambient) + annotation (Placement(transformation( + origin={-40,70}, + extent={{-10,-10},{10,10}}))); + inner Modelica.Fluid.System system(energyDynamics=Modelica.Fluid.Types.Dynamics.FixedInitial) + annotation (Placement(transformation(extent={{-90,70}, + {-70,90}}))); +equation + connect(shut.on, tankController.shut) annotation (Line(points={{-79,-30},{ + -72,-30},{-72,-12},{-62,-12}}, color={255,0,255})); + connect(stop.on, tankController.stop) annotation (Line(points={{-79,0},{-62, + 0}}, color={255,0,255})); + connect(start.on, tankController.start) annotation (Line(points={{-79,30},{ + -70,30},{-70,12},{-62,12}}, color={255,0,255})); + connect(tankController.valve1, valve1.open) annotation (Line(points={{-19,12}, + {-10,12},{-10,62}}, color={255,0,255})); + connect(level1.y, tankController.level1) annotation (Line(points={{-53.25, + -50},{-52,-50},{-52,-22}}, color={0,0,127})); + connect(tankController.valve2, valve2.open) annotation (Line(points={{-19,0}, + {-5,0},{26,0}}, color={255,0,255})); + connect(tankController.valve3, valve3.open) annotation (Line(points={{-19,-12}, + {-10,-12},{-10,-50},{35,-50},{35,-72}}, + color={255,0,255})); + connect(level2.y, tankController.level2) annotation (Line(points={{-31.15, + -70},{-28,-70},{-28,-22}}, color={0,0,127})); + + connect(source.ports[1], valve1.port_a) annotation (Line( + points={{-30,70},{-20,70}}, + color={0,127,255})); + connect(valve3.port_b, ambient1.ports[1]) annotation (Line( + points={{25,-80},{10,-80}}, + color={0,127,255})); + connect(tank2.ports[2], valve3.port_a) annotation (Line( + points={{74,-60},{74,-80},{45,-80}}, + color={0,127,255})); + connect(valve2.port_b, tank2.ports[1]) annotation (Line( + points={{34,-10},{34,-20},{50,-20},{50,-60},{66,-60}}, + color={0,127,255})); + connect(valve1.port_b, tank1.ports[1]) annotation (Line( + points={{0,70},{10,70},{10,30},{26,30}}, + color={0,127,255})); + connect(tank1.ports[2], valve2.port_a) annotation (Line( + points={{34,30},{34,10}}, + color={0,127,255})); + annotation ( + experiment(StopTime=900), + Documentation(info="<html> +<p> +With this example, the controller of a tank filling/emptying system +is demonstrated. +</p> + +<p> +The basic operation is to fill and empty the two tanks: +</p> +<ol> +<li> Valve 1 is opened and tank 1 is filled.</li> +<li> When tank 1 reaches its fill level limit, + valve 1 is closed. </li> +<li> After a waiting time, valve 2 is + opened and the fluid flows from tank 1 into tank 2.</li> +<li> When tank 1 reaches its minimum level, valve 2 is closed. </li> +<li> After a waiting time, valve 3 is opened and + the fluid flows out of tank 2</li> +<li> When tank 2 reaches its minimum level, valve 3 is closed</li> +</ol> +<p> +The above \"normal\" process can be influenced by three +buttons: +</p> +<ul> +<li> Button <b>start</b> starts the above process. + When this button is pressed after a \"stop\" or + \"shut\" operation, the process operation continues. + </li> +<li> Button <b>stop</b> stops the above process by + closing all valves. Then, the controller waits for + further input (either \"start\" or \"shut\" operation).</li> +<li> Button <b>shut</b> is used to shutdown the process, + by emptying at once both tanks by opening valve 2 and + valve 3. When this is achieved, + the process goes back to its start configuration + where all 3 valves are closed. + Clicking on \"start\", restarts the process.</li> +</ul> + +<p> +The demo-run uses the following button presses: +</p> + +<ul> +<li> Button <b>start</b> pressed at 20 s.</li> +<li> Button <b>stop</b> pressed at 220 s </li> +<li> Button <b>start</b> pressed at 280 s </li> +<li> Button <b>stop</b> pressed at 650 s </li> +<li> Button <b>shut</b> pressed at 700 s </li> +<li> Simulate for 900 s</li> +</ul> + +<p> +This example is based on +</p> + +<dl> +<dt>Dressler I. (2004):</dt> +<dd> <b>Code Generation From JGrafchart to Modelica</b>. + Master thesis, supervisor: Karl-Erik Arzen, + Department of Automatic Control, Lund Institute of Technology, + Lund, Sweden, March 30, 2004<br> </dd> +</dl> + +<img src=\"modelica://Modelica/Resources/Images/Fluid/Examples/ControlledTanks.png\" border=\"1\" + alt=\"ControlledTanks.png\"> +</html>"), + __Dymola_Commands(file= + "modelica://Modelica/Resources/Scripts/Dymola/Fluid/ControlledTanks/plot level and ports.m_flow.mos" + "plot level and ports.m_flow")); +end tank_model;
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