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FDC help: analytical tools and Matlab utilities
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Analytical tools and Matlab utilities from the FDC toolbox
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<p>The FDC toolbox makes use of the standard Simulink integrators for simulations and two dedicated Matlab programs for the determination of linearized aircraft models and steady-state trimmed flight conditions. The source files of these programs can be found in the FDC subdirectory <small>PROGRAMS</small>.</p>
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<i><a href="actrim.htm">ACTRIM</a></i> computes trimmed-flight conditions for the non-linear <i><a href="beaver.htm">Beaver</a></i> model, or any other aircraft model that uses the same inputs and state variables as that system. The files <small>ACCONSTR.M</small> and <small>ACCOST.M</small> are subfunctions of this program.
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<i><a href="aclin.htm">ACLIN</a></i> linearizes the aircraft model around a user-specified operating point and gives the user the opportunity to select a subset of the state equations from the linearized model. It uses the Simulink program <i>LINMOD</i> for the actual linearization process.
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<p>Another analytical tool is <i><a href="systprop.htm">SYSTPROP</a></i>, which can be used to quickly find some important parameters of linear state-space systems or transfer functions. The macro's <i><a href="results.htm">RESULTS</a></i> and <i><a href="resplot.htm">RESPLOT</a></i> simplify processing of simulation results. <i><a href="fixstate.htm">FIXSTATE</a></i> is a companion program for the block <i><a href="xfix.htm">XFIX</a></i> within the <i>Beaver</i> model; it sets the <i>xfix</i> variable in the workspace.</p>
<p>Furthermore, several support utilities can be found in the <small>PROGRAMS</small> subdirectory:</p>
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<i>FDCINIT</i> initializes the Matlab search-path for the FDC toolbox and allows modification of this search path if the user e.g. would wish to edit or expand the toolbox.
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<i><a href="datload.htm">DATLOAD</a></i>, <i><a href="linload.htm">LINLOAD</a></i>, <i><a href="matload.htm">MATLOAD</a></i>, and <i><a href="triload.htm">TRILOAD</a></i> make it easy to transfer datafiles of the types *.dat, *.lin, *.mat, and *.tri from the FDC data-directory (or other directories) to the Matlab workspace. These macro's all depend on the generic load function <i><a href="fdcload.htm">FDCLOAD</a></i>.
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<i>DATADIR</i> and <i>HELPDIR</i> determine the location of FDC datafiles and helpfiles, respectively. These macro's depend on the general directory-specification function <i><a href="fdcdir.htm">FDCDIR</a></i>.
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<i><a href="browse.htm">BROWSE</a></i> is a handy command for displaying HTML help-texts (such as the one you are reading now) in a webbrowser or the Matlab help browser.
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<i><a href="newmsgbox.htm">NEWMSGBOX</a></i> creates nicely-formatted message-boxes.
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<i><a href="num2str2.htm">NUM2STR2</a></i> is a variation on the standard <i>NUM2STR</i> command to pretty-print numericals.
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<i><a href="screensize.htm">SCREENSIZE</a></i> determines the size of your screen for the positioning of UI elements.
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<i><a href="txtmenu.htm">TXTMENU</a></i> can be used to display a menu of choices in the Matlab command-window (suppressing the default GUI behaviour of the standard <i>MENU</i> command).
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<p>See the <a href="fdc.htm">table of contents</a> for a complete overview of the FDC help information.</p>
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