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  Version		  3.00
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  SampleTimeColors	  off
  InvariantConstants	  off
  WideVectorLines	  off
  ShowLineWidths	  off
  ShowPortDataTypes	  off
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  Solver		  "ode45"
  RelTol		  "1e-3"
  AbsTol		  "auto"
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  OutputOption		  "RefineOutputTimes"
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  ExternalInput		  "[t, u]"
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  MinStepSizeMsg	  "warning"
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  UnconnectedOutputMsg	  "warning"
  UnconnectedLineMsg	  "warning"
  InheritedTsInSrcMsg	  "warning"
  IntegerOverflowMsg	  "warning"
  UnnecessaryDatatypeConvMsg "none"
  Int32ToFloatConvMsg	  "warning"
  SignalLabelMismatchMsg  "none"
  ConsistencyChecking	  "off"
  ZeroCross		  on
  SimulationMode	  "normal"
  BlockDataTips		  on
  BlockParametersDataTip  on
  BlockAttributesDataTip  off
  BlockPortWidthsDataTip  off
  BlockDescriptionStringDataTip	off
  BlockMaskParametersDataTip off
  ToolBar		  on
  StatusBar		  on
  BrowserShowLibraryLinks off
  BrowserLookUnderMasks	  off
  OptimizeBlockIOStorage  on
  BufferReuse		  on
  BooleanDataType	  off
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  RTWTemplateMakefile	  "grt_default_tmf"
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  ExtModeMexFile	  "ext_comm"
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  ExtModeTrigType	  "manual"
  ExtModeTrigMode	  "oneshot"
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  ExtModeTrigElement	  "any"
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  ExtModeTrigHoldOff	  0
  ExtModeTrigDelay	  0
  ExtModeTrigDirection	  "rising"
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  ExtModeArchiveMode	  "off"
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  ExtModeIncDirWhenArm	  off
  ExtModeAddSuffixToVar	  off
  ExtModeWriteAllDataToWs off
  ExtModeArmWhenConnect	  off
  Created		  "Wed Jan 31 13:23:57 2001"
  UpdateHistory		  "UpdateHistoryNever"
  ModifiedByFormat	  "%<Auto>"
  ModifiedDateFormat	  "%<Auto>"
  LastModifiedDate	  "Wed Jan 31 13:38:13 2001"
  ModelVersionFormat	  "1.%<AutoIncrement:3>"
  ConfigurationManager	  "none"
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    ForegroundColor	    "black"
    BackgroundColor	    "white"
    DropShadow		    off
    NamePlacement	    "normal"
    FontName		    "Helvetica"
    FontSize		    10
    FontWeight		    "normal"
    FontAngle		    "normal"
    ShowName		    on
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  AnnotationDefaults {
    HorizontalAlignment	    "center"
    VerticalAlignment	    "middle"
    ForegroundColor	    "black"
    BackgroundColor	    "white"
    DropShadow		    off
    FontName		    "Helvetica"
    FontSize		    10
    FontWeight		    "normal"
    FontAngle		    "normal"
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    FontName		    "Helvetica"
    FontSize		    9
    FontWeight		    "normal"
    FontAngle		    "normal"
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  System {
    Name		    "a4pr3"
    Location		    [322, 83, 822, 384]
    Open		    on
    ModelBrowserVisibility  off
    ModelBrowserWidth	    200
    ScreenColor		    "automatic"
    PaperOrientation	    "landscape"
    PaperPositionMode	    "auto"
    PaperType		    "usletter"
    PaperUnits		    "inches"
    ZoomFactor		    "100"
    AutoZoom		    on
    ReportName		    "simulink-default.rpt"
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      BlockType		      Gain
      Name		      "Gain"
      Position		      [150, 143, 230, 177]
      Orientation	      "left"
      Gain		      "2*tau*zeta"
      SaturateOnIntegerOverflow	on
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    Block {
      BlockType		      Gain
      Name		      "Gain1"
      Position		      [130, 58, 185, 92]
      Gain		      "1/tau^2"
      SaturateOnIntegerOverflow	on
      Port {
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	Name			"x''"
	TestPoint		off
	RTWStorageClass		"Auto"
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    Block {
      BlockType		      Integrator
      Name		      "Integrator"
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      Position		      [210, 55, 240, 85]
      ExternalReset	      "none"
      InitialConditionSource  "internal"
      InitialCondition	      "0"
      LimitOutput	      off
      UpperSaturationLimit    "inf"
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      ShowSaturationPort      off
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      AbsoluteTolerance	      "auto"
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      ExternalReset	      "none"
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    Block {
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      Floating		      off
      Location		      [188, 365, 512, 604]
      Open		      on
      NumInputPorts	      "1"
      TickLabels	      "OneTimeTick"
      ZoomMode		      "on"
      List {
	ListType		AxesTitles
	axes1			"%<SignalLabel>"
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      Grid		      "on"
      TimeRange		      "auto"
      YMin		      "-5"
      YMax		      "5"
      SaveToWorkspace	      off
      SaveName		      "ScopeData"
      DataFormat	      "StructureWithTime"
      LimitMaxRows	      on
      MaxRows		      "5000"
      Decimation	      "1"
      SampleInput	      off
      SampleTime	      "0"
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    Block {
      BlockType		      Step
      Name		      "Step"
      Position		      [15, 35, 45, 65]
      Time		      "1"
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      SampleTime	      "0"
      Port {
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	TestPoint		off
	RTWStorageClass		"Auto"
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    Block {
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      Position		      [90, 54, 110, 96]
      ShowName		      off
      IconShape		      "rectangular"
      Inputs		      "|+--"
      SaturateOnIntegerOverflow	on
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      Labels		      [0, 0]
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      SrcBlock		      "Integrator"
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    Line {
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      Points		      [-70, 0]
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      Name		      "x"
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