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