jsbsim.js/JSBSim/aircraft/Short_S23/Systems/flaps.xml

JSBSim flight dynamics model ported to JavaScript

<?xml version="1.0"?>
<!--

  Short S.23 flying boat flight model for JSBSim.

    Copyright (C) 2012  Anders Gidenstam  (anders(at)gidenstam.org)

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.
  
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
  
    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  
-->
<system name="flaps">

 <documentation>
  The flap control system consists of a
  - power switch
    - fcs/flap-power-cmd-norm
  - an operating switch (values -1.0/IN, 0.0/STOP, 1.0/OUT)
    - fcs/flap-motor-cmd-norm

  "The flaps on standard S. 23 'boats were moved by a single small
  electric motor, which took a full minute to wind them out to the
  full flap position of 25 deg. and a minute and a half to retract
  them." ([Cassidy:2004:FE], pp.30)

  "The Captain called the flap setting and the First Officer reached
  up to pull the flap motor switch - BLUE light ON - and moved the
  controller flaps operating switch down to FLAPS OUT. As the flaps
  start to move, he confirmed "Flaps going OUT, Sir" while watching
  the flap position indicator move round the dial - the RED light
  coming ON as the flaps moved past the 1/3 OUT position. Flap
  settings were 1/2 3/4 and FULL for heavy swell conditions with a
  maximum speed of 102 knots (188 km .per hr.) for FULL flap."
  ([Cassidy:2004:FE], pp.170)
 </documentation>

 <!--
      Flap control and motor system.
      Inputs:
        electrical/fuses/flap-motor-voltage-V
        fcs/flap-power-cmd-norm
        fcs/flap-motor-cmd-norm

      Outputs:
        electrical/flap-motor/current-A
        electrical/flap-motor/power-W
        electrical/lamps/flaps/pilot-voltage-V
        electrical/lamps/flaps/pilot-current-A
        electrical/lamps/flaps/pilot-power-W
        electrical/lamps/flaps/warning-voltage-V
        electrical/lamps/flaps/warning-current-A
        electrical/lamps/flaps/warning-power-W
        fcs/flap-pos-norm
        fcs/flap-pos-deg
 -->

 <!-- The flap motor/power switch. -->
 <property value="0.0">fcs/flap-power-cmd-norm</property>

 <!-- The flap operating switch. -->
 <property value="0.0">fcs/flap-motor-cmd-norm</property>

 <channel name="Flap indicator lights">

  <switch name="electrical/lamps/flaps/pilot-voltage-V">
   <default value="0.0"/>
   <test logic="AND" value="electrical/fuses/flap-motor-voltage-V">
    fcs/flap-power-cmd-norm GE 0.5
   </test>
  </switch>

  <switch name="electrical/lamps/flaps/warning-voltage-V">
   <default value="0.0"/>
   <test logic="AND" value="electrical/fuses/flap-motor-voltage-V">
    fcs/flap-power-cmd-norm GE 0.5
    fcs/flap-pos-norm       GT 0.334
   </test>
  </switch>

  <fcs_function name="electrical/lamps/flaps/pilot-current-A">
   <function>
    <quotient>
     <property>electrical/lamps/flaps/pilot-voltage-V</property>
     <value>288.0</value> <!-- Resistance of pilot lamp. Assumed to be 2 W. -->
    </quotient>
   </function>
  </fcs_function>
  <fcs_function name="electrical/lamps/flaps/warning-current-A">
   <function>
    <quotient>
     <property>electrical/lamps/flaps/warning-voltage-V</property>
     <value>192.0</value> <!-- Resistance of warning lamp. Assumed to be 3 W.-->
    </quotient>
   </function>
  </fcs_function>

  <fcs_function name="electrical/lamps/flaps/pilot-power-W">
   <function>
    <product>
     <property>electrical/lamps/flaps/pilot-voltage-V</property>
     <property>electrical/lamps/flaps/pilot-current-A</property>
    </product>
   </function>
   <output>/systems/electrical/lamps/flaps/pilot-power-W</output>
  </fcs_function>
  <fcs_function name="electrical/lamps/flaps/pilot-power-norm[0]">
   <function>
    <quotient>
     <property>electrical/lamps/flaps/pilot-power-W[0]</property>
     <value>2.0</value>
    </quotient>
   </function>
   <output>/systems/electrical/lamps/flaps/pilot-power-norm[0]</output>
  </fcs_function>

  <fcs_function name="electrical/lamps/flaps/warning-power-W">
   <function>
    <product>
     <property>electrical/lamps/flaps/warning-voltage-V</property>
     <property>electrical/lamps/flaps/warning-current-A</property>
    </product>
   </function>
   <output>/systems/electrical/lamps/flaps/warning-power-W</output>
  </fcs_function>
  <fcs_function name="electrical/lamps/flaps/warning-power-norm[0]">
   <function>
    <quotient>
     <property>electrical/lamps/flaps/warning-power-W[0]</property>
     <value>3.0</value>
    </quotient>
   </function>
   <output>/systems/electrical/lamps/flaps/warning-power-norm[0]</output>
  </fcs_function>

 </channel>

 <channel name="Flap motor">

  <switch name="electrical/flap-motor/voltage-V">
   <default value="0.0"/>
   <test logic="AND" value="electrical/fuses/flap-motor-voltage-V">
    fcs/flap-power-cmd-norm GE 0.5
    fcs/flap-motor-cmd-norm GE 0.10
    fcs/flap-pos-norm LT 1.00
   </test>
   <test logic="AND" value="electrical/fuses/flap-motor-voltage-V">
    fcs/flap-power-cmd-norm GE 0.5
    fcs/flap-motor-cmd-norm LE -0.10
    fcs/flap-pos-norm GT 0.0
   </test>
  </switch>

  <fcs_function name="electrical/flap-motor/current-A">
   <function>
    <quotient>
     <property>electrical/flap-motor/voltage-V</property>
     <value>1.545</value> <!-- Resistance of motor, derived from max power. -->
    </quotient>
   </function>
  </fcs_function>

  <fcs_function name="electrical/flap-motor/power-W">
   <function>
    <product>
     <property>electrical/flap-motor/voltage-V</property>
     <property>electrical/flap-motor/current-A</property>
    </product>
   </function>
  </fcs_function>

 </channel>

 <channel name="Flaps">

  <switch name="fcs/flap/motor-load-inv-norm">
   <default value="0.0"/>
   <test logic="AND" value="1.0">
    fcs/flap-motor-cmd-norm GE 0.10
    fcs/flap-pos-norm LT 1.00
   </test>
   <test logic="AND" value="-0.667">
    fcs/flap-motor-cmd-norm LE -0.10
    fcs/flap-pos-norm GT 0.0
   </test>
  </switch>

  <fcs_function name="fcs/flap/motor-speed-norm">
   <function>
    <product>
     <property>fcs/flap/motor-load-inv-norm</property>
     <quotient>     
      <property>electrical/flap-motor/power-W</property>
      <value>372.8</value> <!-- Max power of the motor. -->
     </quotient>
    </product>
   </function>
  </fcs_function>

  <integrator name="fcs/flap/pos-norm">
   <input>fcs/flap/motor-speed-norm</input>
   <c1>0.016667</c1>
   <clipto>
    <min>0.0</min>
    <max>1.0</max>
   </clipto>
   <output>fcs/flap-pos-norm</output>
  </integrator>

  <aerosurface_scale name="fcs/flap/pos-deg">
   <input>fcs/flap/pos-norm</input>
   <domain>
    <min> 0 </min>
    <max> 1 </max>
   </domain>
   <range>
    <min>  0 </min>
    <max> 25 </max>
   </range>
   <output>fcs/flap-pos-deg</output>
  </aerosurface_scale>

 </channel>

</system>