LTPDA Toolbox | contents | ![]() ![]() |
Poles and zeros are treated the same with regards creation, so we will look here at poles only. The meaning of a pole and a zero only becomes important when creating a pole/zero model.
Poles are specified by in the LTPDA Toolbox by a frequency, f, and (optionally) a quality factor, Q, or by a complex number.
The following code fragment creates a real pole at 1Hz:
>> pz(1) ------ pz/1 ------- f: 1 q: NaN ri: -6.28318530717959 version: $Id: pzmodel_pz_content.html,v 1.3 2009/02/18 12:15:16 hewitson Exp $ -------------------
To create a complex pole, you can specify a quality factor. For example,
>> pz(1,4) ------ pz/1 ------- f: 1 q: 4 ri: [0.785398163397448+i*6.23390466154956;0.785398163397448-i*6.23390466154956] version: $Id: pzmodel_pz_content.html,v 1.3 2009/02/18 12:15:16 hewitson Exp $ -------------------
This creates a complex pole at 1Hz with a Q of 4. You can also see that the complex representation is also shown, but only one part of the conjugate pair.
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Pole/Zero representation | Building a model | ![]() |
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