jsbsim.js/JSBSim/scripts/c172_cruise_8K.xml

JSBSim flight dynamics model ported to JavaScript

<?xml version="1.0" encoding="UTF-8"?>
<?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 cruise at 4K, 100% power">
  <description>This run is for testing the C172 altitude hold autopilot and cruise performance</description>
  <use aircraft="c172x" initialize="reset01"/>

  <run start="0.0" end="50" dt="0.0083333">
  
    <property value="0"> simulation/run_id </property>

    <event name="Set Temperature">
      <condition>
        simulation/sim-time-sec  ge  0.0
      </condition>
      <set name="atmosphere/delta-T">
        <function>
          <switch>
            <p> simulation/run_id </p>
            <v>   0.0 </v>
            <v> -36.0 </v>
            <v>  36.0 </v>
          </switch>
        </function>
      </set>
      <set name="ap/altitude_setpoint" value="4000.0"/>
    </event>
    
    <event name="Start engine">
      <condition>
        simulation/sim-time-sec  ge  0.01
      </condition>
      <set name="fcs/throttle-cmd-norm" action="FG_RAMP" value="0.50" tc="0.05"/>
      <set name="fcs/mixture-cmd-norm" action="FG_RAMP" value="1.0" tc="0.05"/> 
      <set name="propulsion/magneto_cmd" value="3"/>
      <set name="propulsion/starter_cmd" value="1"/>
      <notify/>
    </event> 

    <event name="Trim">
      <condition>
        simulation/sim-time-sec  gt  1.0
      </condition>
      <set name="simulation/do_simple_trim" value="1"/>
      <notify>
        <property> velocities/u-aero-fps </property>
        <property> velocities/v-aero-fps </property>
        <property> velocities/w-aero-fps </property>
        <property> attitude/psi-rad </property>
        <property> attitude/theta-rad </property>
        <property> attitude/phi-rad </property>
        <property> position/h-agl-ft </property>
        <property> accelerations/pdot-rad_sec2 </property>
        <property> accelerations/qdot-rad_sec2 </property>
        <property> accelerations/rdot-rad_sec2 </property>
        <property> propulsion/engine/thrust-lbs </property>
        <property> propulsion/engine/propeller-rpm </property>
        <property> velocities/p-rad_sec </property>
        <property> velocities/q-rad_sec </property>
        <property> velocities/r-rad_sec </property>
        <property> fcs/elevator-cmd-norm </property>
        <property> fcs/aileron-cmd-norm </property>
        <property> fcs/rudder-cmd-norm </property>
        <property> fcs/elevator-pos-norm </property>
        <property> fcs/right-aileron-pos-norm </property>
        <property> fcs/rudder-pos-norm </property>
        <property> fcs/throttle-pos-norm[0] </property>
        <property> fcs/mixture-pos-norm[0] </property>
        <property> inertia/weight-lbs </property>
        <property> velocities/vc-kts </property>
        <property> velocities/ve-kts </property>
        <property> velocities/vtrue-kts </property>
        <property> atmosphere/T-R </property>
        <property> propulsion/engine/fuel-flow-rate-gph </property>
        <property> propulsion/engine/power-hp </property>
      </notify>
    </event>

    <event name="Hold heading and altitude">
      <condition>simulation/sim-time-sec ge 5</condition>
      <set name="ap/heading_setpoint" value="200"/>
      <set name="ap/heading_hold" value="1"/>
      <set name="ap/altitude_setpoint" value="4000.0"/>
      <set name="ap/altitude_hold" value="1"/>
      <notify/>
    </event>

    <event name="Introduce gust">
      <condition> simulation/sim-time-sec ge 10 </condition>
      <set name="atmosphere/cosine-gust/startup-duration-sec" value="5"/>
      <set name="atmosphere/cosine-gust/steady-duration-sec" value="1"/>
      <set name="atmosphere/cosine-gust/end-duration-sec" value="5"/>
      <set name="atmosphere/cosine-gust/magnitude-ft_sec" value="30"/>
      <set name="atmosphere/cosine-gust/frame" value="2"/>
      <set name="atmosphere/cosine-gust/X-velocity-ft_sec" value="-1"/>
      <set name="atmosphere/cosine-gust/Y-velocity-ft_sec" value="0"/>
      <set name="atmosphere/cosine-gust/Z-velocity-ft_sec" value="0"/>
      <set name="atmosphere/cosine-gust/start" value="1"/>
      <notify/>
    </event>

    <event name="Reset">
      <condition logic="AND">
        simulation/sim-time-sec >= 30.0
        simulation/terminate != 1
      </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/reset" value="1"/>
      <set name="simulation/run_id" type="FG_DELTA" value="1"/>
      <notify>
        <property> simulation/run_id </property>
      </notify>
    </event>

    <event name="Terminate on run ID">
      <condition>
        simulation/run_id  ge  3
      </condition>
      <set name="simulation/terminate" value="1"/>
      <notify>
        <property caption="Terminate: "> simulation/terminate </property>
      </notify>
    </event>

  </run>
</runscript>