Mercurial > hg > ltpda
comparison m-toolbox/html_help/help/ug/convert_models_content.html @ 0:f0afece42f48
Import.
| author | Daniele Nicolodi <nicolodi@science.unitn.it> |
|---|---|
| date | Wed, 23 Nov 2011 19:22:13 +0100 |
| parents | |
| children |
comparison
equal
deleted
inserted
replaced
| -1:000000000000 | 0:f0afece42f48 |
|---|---|
| 1 The different constructors from each transfer function representations accept as | |
| 2 an input a model from a another representation so that they can all be converted | |
| 3 between the different representations. In the current LTPDA version, this applies | |
| 4 for pole/zero model and rational representation. Following versions will cover the | |
| 5 partial fraction representation. This is shown in the following transformation table: | |
| 6 | |
| 7 <div align="center"> | |
| 8 <img src="images/TransformTable.png" alt="Pole/zero model TF" border="3"> | |
| 9 </div> | |
| 10 | |
| 11 <h2>From pzmodel to rational</a></h2> | |
| 12 You can transform a <tt>pzmodel</tt> into a <tt>rational</tt> by typing: | |
| 13 <br> | |
| 14 <div class="fragment"><pre> | |
| 15 >> rat = rational(pzmodel) | |
| 16 </pre></div> | |
| 17 <br> | |
| 18 | |
| 19 <h2>From rational to pzmodel</a></h2> | |
| 20 You can transform a <tt>rational</tt> into a <tt>pzmodel</tt> by typing: | |
| 21 <br> | |
| 22 <div class="fragment"><pre> | |
| 23 >> rat = pzmodel(rational) | |
| 24 </pre></div> | |
| 25 <br> | |
| 26 | |
| 27 <h2>Algorithm</a></h2> | |
| 28 To translate from <tt>rational</tt> to <tt>pzmodel</tt> representation we need to | |
| 29 compute the roots of a polynomial and the inverse operation is performed going from | |
| 30 <tt>pzmodel</tt> to <tt>rational</tt>. More information about the algorithm used can be | |
| 31 found in MATLAB's functions <a href="matlab:doc('poly')">poly</a> and | |
| 32 <a href="matlab:doc('roots')">roots</a>. | |
| 33 | |
| 34 |