fdc.htm

matlab的FDC工具箱

            Atmospheric turbulence filters with airspeed-dependent coefficients
          </td>
          <td class="index">
            <i><a href="turb2.htm">Turb2</a></i>
          </td>
        </tr>
      </table>
    </center>
     
    <h3><a name="Openloop">Open-loop simulation models of the &#39;Beaver&#39; aircraft</a></h3>
    <p>There are three different <a href="oloop.htm">open-loop simulation
    models</a> for the &#39;Beaver&#39; aircraft (which can be applied to any
    aircraft model that uses the same inputs and outputs as the system <i><a
    href="beaver.htm">Beaver</a></i>):</p>
     
    <center>
      <table class="index" border="1" cellpadding="3" cellspacing="1">
        <tr>
          <td class="index">
            Non-linear open-loop responses to control inputs
          </td>
          <td class="index">
            <i><a href="oloop.htm#oloop1/2">OLOOP1</a></i>
          </td>
        </tr>
        <tr>
          <td class="index">
            Non-linear open-loop responses to atmospheric turbulence
          </td>
          <td class="index">
            <i><a href="oloop.htm#oloop1/2">OLOOP2</a></i>
          </td>
        </tr>
        <tr>
          <td class="index">
            Open-loop responses to control inputs, using a linearized aircraft
            model
          </td>
          <td class="index">
            <i><a href="oloop.htm#oloop3">OLOOP3</a></i>
          </td>
        </tr>
      </table>
    </center>

    <p>Another example of an open-loop application is the routine
    <i>TRIMDEMO</i>. There is no on-line help available for this routine yet;
    type <code>help trimdemo</code> at the Matlab command-line for information
    about that routine.</p>
     
    <h3><a name="APmodels">Simulation models of the &#39;Beaver&#39; autopilot</a></h3>
    <p>The FDC toolbox also contains a complete non-linear model of the
    &#39;Beaver&#39; autopilot, which includes options like gain-scheduling and
    longitudinal/lateral cross-coupling. Two simplified versions of the
    autopilot simulation model were included as well in order to speed-up
    computations:</p>
     
    <center>
      <table class="index" border="1" cellpadding="3" cellspacing="1">
        <tr>
          <td class="index">
            Autopilot simulation without sensor models, radio-navigation
            signals, and noise signals
          </td>
          <td class="index">
            <i><a href="apilot.htm#APILOT1">APILOT1</a></i>
          </td>
        </tr>
        <tr>
          <td class="index">
            Autopilot simulation models without noise signals
          </td>
          <td class="index">
            <i><a href="apilot.htm#APILOT2">APILOT2</a></i>
          </td>
        </tr>
        <tr>
          <td class="index">
            Complete autopilot simulation model
          </td>
          <td class="index">
            <i><a href="apilot.htm#APILOT3">APILOT3</a></i>
          </td>
        </tr>
      </table>
    </center>
     
    <p>The systems <a href="apilot.htm#PAHRAH"><i>PAH</i>, <i>RAH</i>, and <i>PAHRAH</i></a> provide alternative implementations of the Pitch and Roll Attitude Hold modes.</p>
    <p>The complete autopilot model <i>APILOT3</i> contains the following
    subsystems (the list reflects the ordering in the block-diagram):</p> 
<pre>
      <a href="apilot.htm">APILOT1/2/3</a>
            Wind and turbulence
                  <a href="turb1.htm">Turb1</a>
                  <a href="blwind.htm">BLwind</a>

            Beaver dynamics
                  <a href="beaver.htm">Beaver</a>

            <a href="sensors.htm">Sensors / subtract initial conditions</a>
            VOR (see <a href="vorxmpl.htm">VOR example</a>)
            ILS (see <a href="ilsxmpl.htm">ILS example</a>)
            Reference signals
            <a href="modectrl.htm">Mode controller</a>
            <a href="ap_asymm.htm">Asymmetrical autopilot modes</a>
            <a href="ap_symm.htm">Symmetrical autopilot modes</a>
            <a href="delaylim.htm">Computational delay and limiters</a>
            <a href="actuatr.htm">Actuator and cable dynamics</a>
            Add initial inputs
</pre>
    
    <h3><a name="Utils">Matlab utilities for the FDC toolbox</a></h3>
    <p>In addition to the Simulink systems, the FDC toolbox contains a number of analytical Matlab functions and support utilities (a short overview of these functions is available <a href="tools.htm">here</a>):</p>
     
    <center>
      <table class="index" border="1" cellpadding="3" cellspacing="1">
        <tr>
          <td class="index">
            Aircraft model linearization utility
          </td>
          <td class="index">
            <i><a href="aclin.htm">ACLIN</a></i>
          </td>
        </tr>
        <tr>
          <td class="index">
            Aircraft trim utility
          </td>
          <td class="index">
            <i><a href="actrim.htm">ACTRIM</a></i>
          </td>
        </tr>
        <tr>
          <td class="index">
            Utility to artificially fix state variables of the non-linear
            aircraft model
          </td>
          <td class="index">
            <i><a href="fixstate.htm">FIXSTATE</a></i>
          </td>
        </tr>
        <tr>
          <td class="index">
            Utility to load aircraft model parameters and other *.DAT datafiles
          </td>
          <td class="index">
            <i><a href="datload.htm">DATLOAD</a></i>
          </td>
        </tr>
        <tr>
          <td class="index">
            Utility for loading *.LIN datafiles (used to store linearized models)
          </td>
          <td class="index">
            <i><a href="triload.htm">LINLOAD</a></i>
          </td>
        </tr>
        <tr>
          <td class="index">
            Utility for loading *.MAT datafiles
          </td>
          <td class="index">
            <i><a href="triload.htm">MATLOAD</a></i>
          </td>
        </tr>
        <tr>
          <td class="index">
            Utility for loading *.TRI datafiles (used  to store trimmed flightconditions)
          </td>
          <td class="index">
            <i><a href="triload.htm">TRILOAD</a></i>
          </td>
        </tr>
        <tr>
          <td class="index">
            Generic data-load function
          </td>
          <td class="index">
            <i><a href="fdcload.htm">FDCLOAD</a></i>
          </td>
        </tr>
        <tr>
          <td class="index">
            Macro for creating datafile with aircraft model parameters
          </td>
          <td class="index">
            <i><a href="modbuild.htm">MODBUILD</a></i>
          </td>
        </tr>
        <tr>
          <td class="index">
            FDC data-directory selection
          </td>
          <td class="index">
            <i><a href="datadir.htm">DATADIR</a></i>
          </td>
        </tr>
        <tr>
          <td class="index">
            FDC help-directory selection
          </td>
          <td class="index">
            <i><a href="helpdir.htm">HELPDIR</a></i>
          </td>
        </tr>
        <tr>
          <td class="index">
            FDC directory selection function
          </td>
          <td class="index">
            <i><a href="fdcdir.htm">FDCDIR</a></i>
          </td>
        </tr>
        <tr>
          <td class="index">
            Utility to display HTML helpfiles
          </td>
          <td class="index">
            <i><a href="browse.htm">BROWSE</a></i>
          </td>
        </tr>
        <tr>
          <td class="index">
            Message box utility
          </td>
          <td class="index">
            <i><a href="newmsgbox.htm">NEWMSGBOX</a></i>
          </td>
        </tr>
        <tr>
          <td class="index">
            Numerical to string conversion utility
          </td>
          <td class="index">
            <i><a href="num2str2.htm">NUM2STR2</a></i>
          </td>
        </tr>
        <tr>
          <td class="index">
            Utility for post-processing simulation results
          </td>
          <td class="index">
            <i><a href="results.htm">RESULTS</a></i>
          </td>
        </tr>
        <tr>
          <td class="index">
            Utility for plotting simulation results
          </td>
          <td class="index">
            <i><a href="resplot.htm">RESPLOT</a></i>
          </td>
        </tr>
        <tr>
          <td class="index">
            Utility to determine screen dimensions
          </td>
          <td class="index">
            <i><a href="screensize.htm">SCREENSIZE</a></i>
          </td>
        </tr>
        <tr>
          <td class="index">
            Utility to determine properties of linearized systems
          </td>
          <td class="index">
            <i><a href="systprop.htm">SYSTPROP</a></i>
          </td>
        </tr>
        <tr>
          <td class="index">
            Function to display a menu of options in the command-window
          </td>
          <td class="index">
            <i><a href="txtmenu.htm">TXTMENU</a></i>
          </td>
        </tr>
      </table>
    </center>
     
    <h3><a name="APutils">Matlab utilities for the autopilot models</a></h3>
    <p>The following two Matlab programs are necessary for the initialization of
    the autopilot models:</p>
     
    <center>
      <table class="index" border="1" cellpadding="3" cellspacing="1">
        <tr>
          <td class="index">
            Utility to initialize the autopilot models <i>APILOT1</i>, <i>APILOT2</i>, and <i>APILOT3</i> (including all subcomponents)
          </td>
          <td class="index">
            <i><a href="apinit.htm">APINIT</a></i>
          </td>
        </tr>
        <tr>
          <td class="index">
            Utility to define the autopilot modes for <i>APILOT1</i>, <i>APILOT2</i>, and <i>APILOT3</i>
          </td>
          <td class="index">
            <i><a href="apmode.htm">APMODE</a></i>
          </td>
        </tr>
        <tr>
          <td class="index">
            Utility to initialize the autopilot models <i>PAH</i>, <i>RAH</i>, and <i>PAHRAH</i>
          </td>
          <td class="index">
            <i><a href="prahinit.htm">PRAHINIT</a></i>
          </td>
        </tr>
      </table><br><br>
    </center>
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