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MATLAB在飞行动力学和控制中应用的工具

<TR><TD>Longitudinal Dryden filter with constant coefficients</TD><TD><I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif"><A HREF="udryd1.htm">UDRYD1</A></FONT></I></TD></TR>
<TR><TD>Lateral Dryden filter with constant coefficients</TD><TD><I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif"><A HREF="vdryd1.htm">VDRYD1</A></FONT></I></TD></TR>
<TR><TD>Vertical Dryden filter with constant coefficients</TD><TD><I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif"><A HREF="wdryd1.htm">WDRYD1</A></FONT></I></TD></TR>
<TR><TD>Longitudinal Dryden filter with airspeed-dependent coefficients</TD><TD><I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif"><A HREF="udryd2.htm">UDRYD2</A></FONT></I></TD></TR>
<TR><TD>Lateral Dryden filter with airspeed-dependent coefficients</TD><TD><I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif"><A HREF="vdryd2.htm">VDRYD2</A></FONT></I></TD></TR>
<TR><TD>Vertical Dryden filter with airspeed-dependent coefficients</TD><TD><I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif"><A HREF="wdryd2.htm">WDRYD2</A></FONT></I></TD></TR>
</TABLE></CENTER><BR><BR>

Examples which show how to combine the turbulence blocks for practical purposes are:<BR><BR>

<CENTER><TABLE CELLPADDING=3 CELLSPACING=2 BORDER=1>
<TR><TD>Atmospheric turbulence filters with constant coefficients</TD><TD><I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif"><A HREF="turb1.htm">Turb1</A></FONT></I></TD></TR>
<TR><TD>Atmospheric turbulence filters  with airspeed-dependent coefficients</TD><TD><I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif"><A HREF="turb2.htm">Turb2</A></FONT></I></TD></TR>
</TABLE>
</CENTER>
<BR><BR><BR>

<A NAME= "Openloop"></A><H3>Open-loop simulation models of the 'Beaver' aircraft</H3>

There are three different <A HREF="oloop.htm">open-loop simulation models</A> for the 'Beaver' aircraft (which can be applied to any aircraft model that uses the same inputs and outputs as the system <I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif"><A HREF="beaver.htm">Beaver</A></FONT></I>). For each of these open-loop models there is also a 'tutorial' which explains the function of each block within these systems. These systems and tutorials have been listed in the following table:<BR><BR>

<CENTER><TABLE CELLPADDING=3 CELLSPACING=2 BORDER=1>
<TR><TD>Non-linear open-loop responses to control inputs</TD><TD><I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif">OLOOP1</FONT></I></TD></TR>
<TR><TD>Non-linear open-loop responses to atmospheric turbulence</TD><TD><I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif">OLOOP2</FONT></I></TD></TR>
<TR><TD>Open-loop responses to control inputs, using a linearized aircraft model</TD><TD><I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif">OLOOP3</FONT></I></TD></TR>
<TR><TD>Tutorial for <I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif">OLOOP1</FONT></I></TD><TD><I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif">OLOOP1T</FONT></I></TD></TR>
<TR><TD>Tutorial for <I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif">OLOOP2</FONT></I></TD><TD><I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif">OLOOP2T</FONT></I></TD></TR>
<TR><TD>Tutorial for <I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif">OLOOP3</FONT></I></TD><TD><I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif">OLOOP3T</FONT></I></TD></TR>
</TABLE>
</CENTER><BR><BR>

Another example of an open-loop application is the routine <I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif">TRIMDEMO</FONT></I>. There is no on-line help available for this routine yet; type <CODE>help trimdemo</CODE> at the M<SMALL>ATLAB</SMALL> command-line for information about that routine.<BR><BR><BR>

<A NAME= "APmodels"></A><H3>Simulation models of the 'Beaver' autopilot</H3>

The FDC toolbox contains a complete non-linear model of the 'Beaver' 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:<BR><BR>

<CENTER><TABLE CELLPADDING=3 CELLSPACING=2 BORDER=1>
<TR><TD>Autopilot simulation without sensor models, radio-navigation signals, and noise signals</TD><TD><I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif"><A HREF="apilot.htm#APILOT1">APILOT1</A></FONT></I></TD></TR>
<TR><TD>Autopilot simulation models without noise  signals</TD><TD><I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif"><A HREF="apilot.htm#APILOT2">APILOT2</A></FONT></I></TD></TR>
<TR><TD>Complete autopilot simulation model</TD><TD><I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif"><A HREF="apilot.htm#APILOT3">APILOT3</A></FONT></I></TD></TR>
</TABLE></CENTER><BR><BR>

The systems PAH, RAH, and PAHRAH provide alternative implementations of the Pitch and Roll Attitude Hold modes. These systems haven't been documented here; see chapter 12 of the <A HREF="#References">user-manual</A> for more details.<BR><BR>

The complete autopilot model <I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif">APILOT3</FONT></I> contains the following subsystems (the list reflects the ordering in the block-diagram):

<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>

<H2>Links to M<SMALL>ATLAB</SMALL> utilities from the FDC toolbox</H2>

<A NAME= "Utils"></A><H3>General M<SMALL>ATLAB</SMALL> utilities for the FDC toolbox</H3>

In addition to the S<SMALL>IMULINK</SMALL> systems, the FDC toolbox contains a number of supporting M<SMALL>ATLAB</SMALL> utilities:<BR><BR>

<CENTER><TABLE CELLPADDING=3 CELLSPACING=2 BORDER=1>
<TR><TD>Aircraft model linearization utility</TD><TD><I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif"><A HREF="aclin.htm">ACLIN</A></FONT></I></TD></TR>
<TR><TD>Aircraft trim utility</TD><TD><I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif"><A HREF="actrim.htm">ACTRIM</A></FONT></I></TD></TR>
<TR><TD>Utility to artificially fix state variables of the non-linear aircraft model</TD><TD><I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif"><A HREF="fixstate.htm">FIXSTATE</A></FONT></I></TD></TR>
<TR><TD>General utility for loading datafiles</TD><TD><I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif"><A HREF="incoload.htm">INCOLOAD</A></FONT></I></TD></TR>
<TR><TD>Utility to load aircraft model parameters</TD><TD><I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif"><A HREF="loader.htm">LOADER</A></FONT></I></TD></TR>
<TR><TD>Utility that creates datafile with aircraft model parameters</TD><TD><I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif"><A HREF="modbuild.htm">MODBUILD</A></FONT></I></TD></TR>
<TR><TD>Utility to recover 'lost' simulation results</TD><TD><I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif"><A HREF="recover.htm">RECOVER</A></FONT></I></TD></TR>
<TR><TD>Utility for post-processing simulation results</TD><TD><I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif"><A HREF="results.htm">RESULTS</A></FONT></I></TD></TR>
<TR><TD>Utility for plotting simulation results</TD><TD><I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif"><A HREF="resplot.htm">RESPLOT</A></FONT></I></TD></TR>
<TR><TD>Utility to determine properties of linearized systems</TD><TD><I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif"><A HREF="systprop.htm">SYSTPROP</A></FONT></I></TD></TR>
</TABLE></CENTER><BR><BR><BR>

<A NAME= "APutils"></A><H3>M<SMALL>ATLAB</SMALL> utilities for the autopilot models</H3>

The following two M<SMALL>ATLAB</SMALL> programs are necessary for the initialization of the autopilot models:
<BR><BR>

<CENTER><PRE><TABLE CELLPADDING=3 CELLSPACING=2 BORDER=1>
<TR><TD>Utility to initialize the autopilot model (including all its subcomponents)</TD><TD><I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif"><A HREF="apinit.htm">APINIT</A></FONT></I></TD></TR>
<TR><TD>Utility to define the autopilot mode</TD><TD><I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif"><A HREF="apmode.htm">APMODE</A></FONT></I></TD></TR>
</TABLE></PRE></CENTER><BR><BR><BR>

<H2><A NAME= "References">References</A></H2>

The main source of information about the FDC toolbox is the following report:
<OL>
<LI>M.O. Rauw: <I>FDC 1.2 - A S<SMALL>IMULINK</SMALL> Environment for Flight Dynamics and Control Analysis</I>. Zeist, The Netherlands, March 1997.
<BR><BR>
Other, closely related references are:
<BR><BR>
<LI>M.O. Rauw: <I>A S<SMALL>IMULINK</SMALL> environment for Flight Dynamics and Control analysis - Application to the DHC-2 'Beaver'</I> (2 parts). MSc-thesis, Delft University of Technology, Faculty of Aerospace Engineering, Delft, The Netherlands, 1993.
<LI>P.N.H. Wever: <I>Ontwerp en implementatie van de regelwetten van de De Havilland DHC-2 'Beaver'</I> (in Dutch). MSc-thesis, Delft University of Technology, Faculty of Aerospace Engineering, Delft, The Netherlands, 1993.
</OL>


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