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Integrate with LTPDAPreferences
author
Daniele Nicolodi <nicolodi@science.unitn.it>
date
Mon, 05 Dec 2011 16:20:06 +0100 (2011-12-05)
parents
f0afece42f48
children
line source
+ −
+ − <p>
+ − Transfer functions can be expressed as a quocient of polynomials as in the following expression
+ − </p>
+ − <br>
+ − <div align="center">
+ − <img src="images/rational_tf_eqn.png" alt="Pole/zero model TF" border="3">
+ − </div>
+ − <br>
+ − <p>
+ − The constructor can be used in different ways
+ − </p>
+ − <h2>From coefficients</a></h2>
+ − <p>
+ − The standard way is to input the coefficients of your filter. The constructor
+ − accepts as a optional properties the name
+ − </p>
+ − <br>
+ − <div class="fragment"><pre>
+ − >> rat = rational([1 3 5 7],[5 10 0.01],'filter_name')
+ − ---- rational 1 ----
+ − model: filter_name
+ − num: [1 3 5 7]
+ − den: [5 10 0.01]
+ − iunits: []
+ − ounits: []
+ − --------------------
+ − </pre></div>
+ − <br>
+ − <h2>From partial XML file</a></h2>
+ − You can input a XML file containing a transfer function model into the constructor
+ − <br>
+ − <div class="fragment"><pre>
+ − >> rat = rational('datafile.xml')
+ − </pre></div>
+ − <br>
+ − <h2>From mat file</a></h2>
+ − You can input a mat file containing a transfer function model into the constructor
+ − <br>
+ − <div class="fragment"><pre>
+ − >> rat = rational('datafile.mat')
+ − </pre></div>
+ − <br>
+ − <h2>From plist</a></h2>
+ − All the properties of the filter can be specified in a plist and then passed to the constructor:
+ − <br>
+ − <div class="fragment"><pre>
+ − >> pl = plist('iunits','m','ounits','V','num',[1 3 10],'den',[4 6],...
+ − 'name','filter_mame');
+ − >> par = parfrac(pl)
+ − ---- rational 1 ----
+ − model: filter_mame
+ − num: [1 3 10]
+ − den: [4 6]
+ − iunits: [m]
+ − ounits: [V]
+ − --------------------
+ − </pre></div>
+ − <br>
+ − <h2>From repository</a></h2>
+ − Rational transfer function can be obtained from the <a href="repo.html"> repository </a> with the following syntax.
+ − <br>
+ − <div class="fragment"><pre>
+ − >> rat = rational('Hostname','localhost','Database','ltpda',...
+ − 'ID',[],'CID',[],'Binary',yes)
+ − </pre></div>
+ − <br>