📄 windlib.htm
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FDC help: WINDLIB
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<h2>
Blocklibrary <i>WINDLIB</i>
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<p>The FDC blocklibrary <i>WINDLIB</i> contains sublibraries with Simulink
models of wind and atmospheric turbulence. The models determine external
atmospheric disturbances, which can be connected to a non-linear aircraft
model (e.g. <i><a href="beaver.htm">Beaver</a></i>), because the results
are determined in terms velocity components within the body-fixed reference
frame of the aircraft. For more details about the underlying theory, see
the <a href="#References">references</a> at the end of this help-text.</p>
<p>The <i>Wind models</i> sublibrary contains the following blocks:</p>
<ul>
<li>
<i><a href="blwind.htm">BLwind</a></i><br>
Wind profile in Earth's
<u>B</u>oundary <u>L</u>ayer
</li>
<li>
<i><a href="cwind.htm">Cwind</a></i><br>
<u>C</u>onstant horizontal wind
</li>
</ul>
<p>The <i>Atmospheric turbulence models</i> sublibrary contains the following
blocks:</p>
<ul>
<li>
<i><a href="turb1.htm">turb1</a></i><br>
Example system which combines
<i>UDRYD1</i>, <i>VDRYD1</i>, and <i>WDRYD1</i> in one subsystem
</li>
<li>
<i><a href="turb2.htm">turb2</a></i><br>
Example system which combines
<i>UDRYD2</i>, <i>VDRYD2</i>, and <i>WDRYD2</i> in one subsystem
</li>
<li>
<i><a href="udryd1.htm">UDRYD1</a></i><br>
Longitudinal Dryden filter with constant
coefficients
</li>
<li>
<i><a href="udryd2.htm">UDRYD2</a></i><br>
Longitudinal Dryden filter with
velocity-dependent coefficients
</li>
<li>
<i><a href="vdryd1.htm">VDRYD1</a></i><br>
Lateral Dryden filter with constant
coefficients
</li>
<li>
<i><a href="vdryd2.htm">VDRYD2</a></i><br>
Lateral Dryden filter with
velocity-dependent coefficients
</li>
<li>
<i><a href="wdryd1.htm">WDRYD1</a></i><br>
Vertical Dryden filter with constant
coefficients
</li>
<li>
<i><a href="wdryd2.htm">WDRYD2</a></i><br>
Vertical Dryden filter with
velocity-dependent coefficients
</li>
</ul>
<h3>
<a name="References">References</a>
</h3>
<p>Apart from the FDC user-manual, the following references contain more information about the wind and turbulence models:</p>
<ol>
<li>
M.O. Rauw: <i>A Simulink environment for Flight Dynamics and Control
analysis - Application to the DHC-2 'Beaver'</i>, part I:
<i>Implementation of a model library in Simulink</i>. Delft University
of Technology, September 1993 (also contained in the STAR database of
NASA, report number NONP-NASA-SUPPL-DK-94-28027)
</li>
<li>
Approach and Landing Simulation, AGARD report 632, Ames, 1975.
</li>
</ol>
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