FMI3.xml

<?xml version="1.0" encoding="UTF-8" ?>
<fmiModelDescription
  fmiVersion="3.0"
  modelName="Oscillator"
  description="This model is used for the partitioned simulation of an oscillator with three springs and two masses. The oscillator is cut in the middle spring for partitioning. Here, two springs with one mass between them are calculated."
  generationTool="Reference FMUs (development build)"
  instantiationToken="{1AE5E10D-9521-4DE3-80B9-D0EAAA7D5AF1}">
  <ModelExchange
    modelIdentifier="Oscillator"
    canGetAndSetFMUstate="true"
    canSerializeFMUstate="false" />

  <CoSimulation
    modelIdentifier="Oscillator"
    canGetAndSetFMUState="true"
    canSerializeFMUState="false"
    canHandleVariableCommunicationStepSize="true"
    providesIntermediateUpdate="false"
    canReturnEarlyAfterIntermediateUpdate="false"
    fixedInternalStepSize="1e-3"
    hasEventMode="true" />

  <UnitDefinitions>
    <Unit name="N/m">
      <BaseUnit s="-2" kg="1" />
    </Unit>
    <Unit name="rad/s">
      <BaseUnit s="-1" />
    </Unit>
    <Unit name="Hz">
      <BaseUnit s="-1" />
    </Unit>
    <Unit name="kg">
      <BaseUnit kg="1" />
    </Unit>
    <Unit name="N">
      <BaseUnit m="1" s="-2" kg="1" />
    </Unit>
    <Unit name="m/s2">
      <BaseUnit m="1" s="-2" />
    </Unit>
    <Unit name="m.s-2">
      <BaseUnit m="1" s="-2" />
    </Unit>
    <Unit name="m.s-1">
      <BaseUnit m="1" s="-1" />
    </Unit>
    <Unit name="m/s">
      <BaseUnit m="1" s="-1" />
    </Unit>
    <Unit name="m">
      <BaseUnit m="1" />
    </Unit>
  </UnitDefinitions>

  <LogCategories>
    <Category name="logEvents" description="Log events" />
    <Category name="logStatusError" description="Log error messages" />
  </LogCategories>

  <DefaultExperiment startTime="0" stopTime="1" stepSize="1e-3" />

  <ModelVariables>
    <Float64
      name="time"
      valueReference="0"
      causality="independent"
      variability="continuous"
      description="Simulation time" />
    <Float64
      name="mass.m"
      valueReference="1"
      causality="parameter"
      variability="fixed"
      initial="exact"
      start="1"
      unit="kg"
      description="Mass of the body" />
    <Float64
      name="mass.u"
      valueReference="2"
      causality="parameter"
      variability="tunable"
      initial="exact"
      start="0"
      unit="m"
      description="Absolute position of the body" />
    <Float64
      name="mass.v"
      valueReference="3"
      causality="parameter"
      variability="tunable"
      initial="exact"
      start="0"
      unit="m/s"
      description="Velocity of the body" />
    <Float64
      name="mass.a"
      valueReference="4"
      causality="local"
      variability="tunable"
      initial="calculated"
      unit="m/s2"
      description="Acceleration of the body" />
    <Float64
      name="spring_fixed.c"
      valueReference="5"
      causality="parameter"
      variability="fixed"
      initial="exact"
      start="3.1416"
      unit="N/m"
      description="Spring constant of the spring mounted on the wall" />
    <Float64
      name="spring_middle.c"
      valueReference="6"
      causality="parameter"
      variability="fixed"
      initial="exact"
      start="3.1416"
      unit="N/m"
      description="Spring constant of the spring between the masses" />
    <Float64
      name="force_in"
      valueReference="7"
      causality="parameter"
      variability="tunable"
      initial="exact"
      start="0"
      unit="m"
      description="Input force calculated by the other partition" />
    <Float64
      name="force_out"
      valueReference="8"
      causality="parameter"
      variability="tunable"
      initial="exact"
      start="0"
      unit="m"
      description="Output force calculated by this partition" />
    <Float64
      name="alpha_f"
      valueReference="9"
      causality="parameter"
      variability="fixed"
      initial="exact"
      start="0"
      description="Parameter f of generalized alpha method" />
    <Float64
      name="alpha_m"
      valueReference="10"
      causality="parameter"
      variability="fixed"
      initial="exact"
      start="0"
      description="Parameter m of generalized alpha method" />
  </ModelVariables>

  <ModelStructure>
    <Output valueReference="2" />
    <InitialUnknown valueReference="4" dependencies="6 7" dependenciesKind="dependent dependent" />
  </ModelStructure>
</fmiModelDescription>