jsbsim.js/JSBSim/scripts/c172_elevation_test.xml

JSBSim flight dynamics model ported to JavaScript

<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="http://jsbsim.sourceforge.net/JSBSimScript.xsl"?>
<runscript xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:noNamespaceSchemaLocation="http://jsbsim.sf.net/JSBSimScript.xsd"
    name="C172-01A takeoff elevation test">
  <!--
    This run is for testing the C172 at different takeoff elevations.
    
    The run begins with the brakes set on all wheels. The engine is started
    and the heading hold autopilot mode is set. At 2.0 seconds the brakes are
    released and the rollout begins. The flaps are set to 32%, which is
    10 degrees.
  -->

  <use aircraft="c172x" initialize="reset00"/>
  <run start="0.0" end="1000" dt="0.008333333333333333333">

    <property> simulation/notify-time-trigger </property>
    <property value="1"> simulation/run_id </property>
    <property value="1"> fcs/left-brake-cmd-norm </property>
    <property value="1"> fcs/right-brake-cmd-norm </property>
    <property value="1"> fcs/center-brake-cmd-norm </property>

    <event name="engine start">
      <description>Start the engine</description>
      <condition> simulation/sim-time-sec >= 0.25 </condition>
      <set name="fcs/throttle-cmd-norm" value="1.00" action="FG_RAMP" tc ="0.5"/>
      <set name="fcs/mixture-cmd-norm" value="1.00" action="FG_RAMP" tc ="0.5"/>
      <set name="propulsion/magneto_cmd" value="3"/>
      <set name="propulsion/starter_cmd" value="1"/>
      <set name="ap/autopilot-roll-on" value="1"/>
      <set name="ap/roll-attitude-mode" value="0"/>
      <notify>
        <property>simulation/run_id</property>
        <property>ap/hdg-roll-err-c1</property>
        <property> position/terrain-elevation-asl-ft </property>
        <property> position/h-agl-ft </property>
        <property> position/h-sl-ft </property>
        <property> metrics/terrain-radius </property>
      </notify>
    </event>

    <event name="Begin roll">
      <description>Release brakes and get rolling with flaps at 10 degrees. </description>
      <condition> simulation/sim-time-sec >= 2.0 </condition>
      <set name="fcs/left-brake-cmd-norm" value="0"/>
      <set name="fcs/right-brake-cmd-norm" value="0"/>
      <set name="fcs/center-brake-cmd-norm" value="0"/>
      <set name="fcs/flap-cmd-norm" value="0.33"/>
    </event>

    <event name="Rotate">
      <description>Set Autopilot for 400 ft and rotate at 49 keas. </description>
      <notify/>
      <condition> velocities/vc-kts >= 49 </condition>
      <set name="ap/altitude_setpoint" value="400.0"/>
      <set name="ap/altitude_hold" value="1"/>
    </event>

    <event name="Set autopilot for 6000 ft.">
      <description>Set Autopilot for 6000 ft after a five second delay. </description>
      <notify/>
      <condition> velocities/vc-kts >= 49 </condition>
      <delay>5.0</delay>
      <set name="ap/altitude_setpoint" value="6000.0"/>
    </event>

    <event name="Adjust throttle/flaps">
      <description>Remove flaps at 50 ft and set heading to 100; acquire heading.</description>
      <notify/>
      <condition>
        position/h-agl-ft >= 2000
      </condition>
      <set name="fcs/flap-cmd-norm" value="0"/>
      <set name="guidance/specified-heading-rad" value="1.75"/>
      <set name="guidance/heading-selector-switch" value="1"/>
      <set name="ap/roll-attitude-mode" value="1"/>
    </event>

    <event name="Time Notify" persistent="true">
      <description>Output message at 1 minute intervals</description>
      <notify>
        <property>velocities/vc-kts</property>
        <property>position/h-agl-ft</property>
        <property>position/lat-geod-deg</property>
        <property>position/geod-alt-ft</property>
      </notify>
      <condition> simulation/sim-time-sec >= simulation/notify-time-trigger </condition>
      <set name="simulation/notify-time-trigger" value="60" type="FG_DELTA"/>
    </event>

    <event name="Terminate">
      <description>
        Terminate this run when the run ID is greater than a specified number
      </description>
      <condition>
        simulation/run_id >= 9
      </condition>
      <set name="simulation/terminate" value="1"/>
      <notify/>
    </event>

    <event name="Reset">
      <description>
        This event is very critical with regard to when the various properties
        below are set. The terrain elevation is set in the initial conditions (IC)
        BEFORE the reset is performed. Since the altitude is initially set as an
        altitude above ground level (AGL), it needs not to be repeated here as
        JSBSim will update the altitude above sea level (ASL) to keep the AGL in
        the IC at its original value.
      </description>
      <condition>
        simulation/sim-time-sec  ge  300.0
      </condition>
      <set name="ap/heading_setpoint" value="0"/>
      <set name="ap/altitude_setpoint" value="0"/>
      <set name="ap/altitude_hold" value="0"/>
      <set name="ap/heading_hold" value="0"/>
      <set name="simulation/run_id" type="FG_DELTA" value="1"/>
      <set name="ic/terrain-elevation-ft">
        <function>
          <product>
            <property>simulation/run_id</property>
            <value>500.0</value>
          </product>
        </function>
      </set>
      <set name="simulation/reset" value="1"/>
      <notify>
        <property> simulation/run_id </property>
        <property> position/terrain-elevation-asl-ft </property>
        <property> position/h-agl-ft </property>
        <property> position/h-sl-ft </property>
        <property> metrics/terrain-radius </property>
      </notify>
    </event>

  </run>
</runscript>