<!DOCTYPE OMNotebook>
<Notebook>
 <GroupCell closed="false" >
  <GroupCell closed="false" >
   <TextCell style="Title" >
    <Text>&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;/head>&lt;body style=" white-space: pre-wrap; font-family:MS Shell Dlg; font-size:8.25pt; font-weight:400; font-style:normal; text-decoration:none;">&lt;p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; font-family:Arial; font-size:38pt; font-weight:600; color:#000000;">Moon Landing using Inheritance&lt;/p>&lt;/body>&lt;/html></Text>
   </TextCell>
   <GroupCell closed="false" >
    <TextCell style="Section" >
     <Text>&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;/head>&lt;body style=" white-space: pre-wrap; font-family:MS Shell Dlg; font-size:8.25pt; font-weight:400; font-style:normal; text-decoration:none;">&lt;p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; font-family:Times; font-size:18pt; font-weight:600; color:#000000;">Body&lt;/p>&lt;/body>&lt;/html></Text>
    </TextCell>
    <TextCell style="Text" >
     <Text>&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;/head>&lt;body style=" white-space: pre-wrap; font-family:MS Shell Dlg; font-size:8.25pt; font-weight:400; font-style:normal; text-decoration:none;">&lt;p style=" 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;">In the &lt;span style=" font-family:Courier New;">MoonLanding&lt;/span> example from Chapter 3 the declaration of certain fields like &lt;span style=" font-family:Courier New;">mass&lt;/span> and &lt;span style=" font-family:Courier New;">name&lt;/span> were repeated in each of the classes &lt;span style=" font-family:Courier New;">CelestialBody&lt;/span> and &lt;span style=" font-family:Courier New;">Rocket&lt;/span>. This can be avoided by collecting those field declarations into a generic body class called &lt;span style=" font-family:Courier New;">Body&lt;/span>, and reusing these by inheriting &lt;span style=" font-family:Courier New;">Body&lt;/span> into &lt;span style=" font-family:Courier New;">CelestialBody&lt;/span> and &lt;span style=" font-family:Courier New;">Rocket&lt;/span>. &lt;br />&lt;br />We have replaced the general keyword &lt;span style=" font-family:Courier New;">class&lt;/span> by the restricted class keyword &lt;span style=" font-family:Courier New;">model&lt;/span> which has the same semantics as &lt;span style=" font-family:Courier New;">class&lt;/span> apart from the fact that it cannot be used in connections. The reason is that it is more common practice to use the keyword &lt;span style=" font-family:Courier New;">model&lt;/span> for modeling purposes than to use the keyword &lt;span style=" font-family:Courier New;">class&lt;/span>. &lt;br />&lt;/p>&lt;/body>&lt;/html></Text>
    </TextCell>
    <InputCell style="Input" closed="true" >
     <Input>model Body              "Generic body"
  Real mass;
  String name;
end Body;  </Input>
     <Output></Output>
    </InputCell>
   </GroupCell>
   <GroupCell closed="false" >
    <TextCell style="Section" >
     <Text>&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;/head>&lt;body style=" white-space: pre-wrap; font-family:MS Shell Dlg; font-size:8.25pt; font-weight:400; font-style:normal; text-decoration:none;">&lt;p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; font-family:Times; font-size:18pt; font-weight:600; color:#000000;">Celestial Body&lt;/p>&lt;/body>&lt;/html></Text>
    </TextCell>
    <InputCell style="Input" closed="true" >
     <Input>model CelestialBody          "Celestial body"
  extends Body;
  constant Real g = 6.672e-11;
  parameter Real radius;
end CelestialBody;
</Input>
     <Output></Output>
    </InputCell>
   </GroupCell>
   <GroupCell closed="false" >
    <TextCell style="Section" >
     <Text>&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;/head>&lt;body style=" white-space: pre-wrap; font-family:MS Shell Dlg; font-size:8.25pt; font-weight:400; font-style:normal; text-decoration:none;">&lt;p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; font-family:Times; font-size:18pt; font-weight:600; color:#000000;">Rocket&lt;/p>&lt;/body>&lt;/html></Text>
    </TextCell>
    <InputCell style="Input" closed="true" >
     <Input>class Rocket
  extends Body;
  Real altitude(start = 59404);
  Real velocity(start = -2003);
  Real acceleration;
  Real thrust;                // Thrust force on the rocket
  Real gravity;                // Gravity forcefield
  parameter Real massLossRate = 0.000277;
equation
  (thrust - mass*gravity) / mass = acceleration;
  der(mass) = -massLossRate * abs(thrust);
  der(altitude) = velocity;
  der(velocity) = acceleration;
end Rocket;  
</Input>
     <Output></Output>
    </InputCell>
   </GroupCell>
   <GroupCell closed="false" >
    <TextCell style="Section" >
     <Text>&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;/head>&lt;body style=" white-space: pre-wrap; font-family:MS Shell Dlg; font-size:8.25pt; font-weight:400; font-style:normal; text-decoration:none;">&lt;p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; font-family:Times; font-size:18pt; font-weight:600; color:#000000;">Moon Landing&lt;/p>&lt;/body>&lt;/html></Text>
    </TextCell>
    <InputCell style="Input" closed="true" >
     <Input>model MoonLanding
  parameter Real force1 = 36350;
  parameter Real force2 = 1308;
  parameter Real thrustEndTime = 210;
  parameter Real thrustDecreaseTime = 43.2;
  Rocket apollo(name = "Apollo13", mass(start=1038.358) );
  CelestialBody moon(name = "moon", mass = 7.382e22, radius = 1.738e6);
equation
  apollo.thrust = if (time &lt; thrustDecreaseTime) then force1
             else if (time &lt; thrustEndTime) then force2
             else 0;
  apollo.gravity = moon.g*moon.mass/(apollo.altitude + moon.radius)^2;
end MoonLanding;  </Input>
     <Output></Output>
    </InputCell>
   </GroupCell>
   <GroupCell closed="false" >
    <TextCell style="Section" >
     <Text>&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;/head>&lt;body style=" white-space: pre-wrap; font-family:MS Shell Dlg; font-size:8.25pt; font-weight:400; font-style:normal; text-decoration:none;">&lt;p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; font-family:Times; font-size:18pt; font-weight:600; color:#000000;">Moonlanding Simulation&lt;/p>&lt;/body>&lt;/html></Text>
    </TextCell>
    <InputCell style="Input" closed="true" >
     <Input>simulate( MoonLanding, stopTime=230 );</Input>
     <Output></Output>
    </InputCell>
    <TextCell style="Output" >
     <Text>&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;/head>&lt;body style=" white-space: pre-wrap; font-family:MS Shell Dlg; font-size:8.25pt; font-weight:400; font-style:normal; text-decoration:none;">&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:Courier New; font-size:11pt; color:#000000;">&lt;/p>&lt;/body>&lt;/html></Text>
    </TextCell>
    <InputCell style="Input" closed="true" >
     <Input>plot( apollo.altitude, xrange={0,208} );</Input>
     <Output>&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;/head>&lt;body style=" white-space: pre-wrap; font-family:MS Shell Dlg; font-size:8.25pt; font-weight:400; font-style:normal; text-decoration:none;">&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:Courier New; font-size:11pt; color:#000000;">&lt;/p>&lt;/body>&lt;/html></Output>
    </InputCell>
    <TextCell style="Text" >
     <Text>&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;/head>&lt;body style=" white-space: pre-wrap; font-family:MS Shell Dlg; font-size:8.25pt; font-weight:400; font-style:normal; text-decoration:none;">&lt;p style=" 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;img src="file:///C:/OpenModelica132/bin/OMNoteboook_tempfiles/5.png" width="288" height="214" />&lt;/p>&lt;/body>&lt;/html></Text>
     <Image name="file:///C:/OpenModelica132/bin/OMNoteboook_tempfiles/5.png" >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</Image>
    </TextCell>
    <TextCell style="Text" >
     <Text>&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;/head>&lt;body style=" white-space: pre-wrap; font-family:MS Shell Dlg; font-size:8.25pt; font-weight:400; font-style:normal; text-decoration:none;">&lt;p style=" 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;span style=" font-weight:600;">Diagram 1:&lt;/span> Altitude of the Apollo rocket over the lunar surface&lt;br />&lt;/p>&lt;/body>&lt;/html></Text>
    </TextCell>
    <InputCell style="Input" closed="true" >
     <Input>plot( apollo.thrust, xrange={0,208} );</Input>
     <Output>&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;/head>&lt;body style=" white-space: pre-wrap; font-family:MS Shell Dlg; font-size:8.25pt; font-weight:400; font-style:normal; text-decoration:none;">&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:Courier New; font-size:11pt; color:#000000;">&lt;/p>&lt;/body>&lt;/html></Output>
    </InputCell>
    <TextCell style="Text" >
     <Text>&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;/head>&lt;body style=" white-space: pre-wrap; font-family:MS Shell Dlg; font-size:8.25pt; font-weight:400; font-style:normal; text-decoration:none;">&lt;p style=" 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;img src="file:///C:/OpenModelica132/bin/OMNoteboook_tempfiles/6.png" width="288" height="214" />&lt;/p>&lt;/body>&lt;/html></Text>
     <Image name="file:///C:/OpenModelica132/bin/OMNoteboook_tempfiles/6.png" >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</Image>
    </TextCell>
    <TextCell style="Text" >
     <Text>&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;/head>&lt;body style=" white-space: pre-wrap; font-family:MS Shell Dlg; font-size:8.25pt; font-weight:400; font-style:normal; text-decoration:none;">&lt;p style=" 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;span style=" font-weight:600;">Diagram 2:&lt;/span> Thrust from the rocket motor, with an initial high thrust f1 followed by a lower thrust f2.&lt;br />&lt;/p>&lt;/body>&lt;/html></Text>
    </TextCell>
    <InputCell style="Input" closed="true" >
     <Input>plot( apollo.mass );</Input>
     <Output>&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;/head>&lt;body style=" white-space: pre-wrap; font-family:MS Shell Dlg; font-size:8.25pt; font-weight:400; font-style:normal; text-decoration:none;">&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:Courier New; font-size:11pt; color:#000000;">&lt;/p>&lt;/body>&lt;/html></Output>
    </InputCell>
    <TextCell style="Text" >
     <Text>&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;/head>&lt;body style=" white-space: pre-wrap; font-family:MS Shell Dlg; font-size:8.25pt; font-weight:400; font-style:normal; text-decoration:none;">&lt;p style=" 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;img src="file:///C:/OpenModelica132/bin/OMNoteboook_tempfiles/7.png" width="288" height="214" />&lt;/p>&lt;/body>&lt;/html></Text>
     <Image name="file:///C:/OpenModelica132/bin/OMNoteboook_tempfiles/7.png" >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</Image>
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    <TextCell style="Text" >
     <Text>&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;/head>&lt;body style=" white-space: pre-wrap; font-family:MS Shell Dlg; font-size:8.25pt; font-weight:400; font-style:normal; text-decoration:none;">&lt;p style=" 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;span style=" font-weight:600;">Diagram 3:&lt;/span> Rocket mass decreases when the fuel is consumed&lt;br />&lt;/p>&lt;/body>&lt;/html></Text>
    </TextCell>
    <InputCell style="Input" closed="true" >
     <Input>plot( apollo.gravity, xrange={0,208} );</Input>
     <Output>&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;/head>&lt;body style=" white-space: pre-wrap; font-family:MS Shell Dlg; font-size:8.25pt; font-weight:400; font-style:normal; text-decoration:none;">&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:Courier New; font-size:11pt; color:#000000;">&lt;/p>&lt;/body>&lt;/html></Output>
    </InputCell>
    <TextCell style="Text" >
     <Text>&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;/head>&lt;body style=" white-space: pre-wrap; font-family:MS Shell Dlg; font-size:8.25pt; font-weight:400; font-style:normal; text-decoration:none;">&lt;p style=" 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;img src="file:///C:/OpenModelica132/bin/OMNoteboook_tempfiles/8.png" width="288" height="214" />&lt;/p>&lt;/body>&lt;/html></Text>
     <Image name="file:///C:/OpenModelica132/bin/OMNoteboook_tempfiles/8.png" >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</Image>
    </TextCell>
    <TextCell style="Text" >
     <Text>&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;/head>&lt;body style=" white-space: pre-wrap; font-family:MS Shell Dlg; font-size:8.25pt; font-weight:400; font-style:normal; text-decoration:none;">&lt;p style=" 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;span style=" font-weight:600;">Diagram 4:&lt;/span> Gradually increasing gravity when the rocket approaches the lunar surface&lt;br />&lt;/p>&lt;/body>&lt;/html></Text>
    </TextCell>
    <InputCell style="Input" closed="true" >
     <Input>plot( apollo.velocity, xrange={0,208} );</Input>
     <Output>&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;/head>&lt;body style=" white-space: pre-wrap; font-family:MS Shell Dlg; font-size:8.25pt; font-weight:400; font-style:normal; text-decoration:none;">&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:Courier New; font-size:11pt; color:#000000;">&lt;/p>&lt;/body>&lt;/html></Output>
    </InputCell>
    <TextCell style="Text" >
     <Text>&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;/head>&lt;body style=" white-space: pre-wrap; font-family:MS Shell Dlg; font-size:8.25pt; font-weight:400; font-style:normal; text-decoration:none;">&lt;p style=" 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;img src="file:///C:/OpenModelica132/bin/OMNoteboook_tempfiles/9.png" width="288" height="214" />&lt;/p>&lt;/body>&lt;/html></Text>
     <Image name="file:///C:/OpenModelica132/bin/OMNoteboook_tempfiles/9.png" >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</Image>
    </TextCell>
    <TextCell style="Text" >
     <Text>&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;/head>&lt;body style=" white-space: pre-wrap; font-family:MS Shell Dlg; font-size:8.25pt; font-weight:400; font-style:normal; text-decoration:none;">&lt;p style=" 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;span style=" font-weight:600;">Diagram 5:&lt;/span> Vertical velocity relative to the lunar surface&lt;/p>&lt;/body>&lt;/html></Text>
    </TextCell>
   </GroupCell>
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