Nyquist plot of idproc Model

Question

Paul 2021-9-16

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1454409-nyquist-plot-of-idproc-model

回答： Khaled Aljanaideh 2021-9-17

PT2_Td.mat

Hi,

I created a Process Model with System Identificaion Toolbox and received a PT2 Transfer function with delay. I exported it to Matlab and received an idproc Model. Now, I wanted to do a Nyquist plot with it, which didn't work. I know that it probably will work if I extract the parameters and build a transfer function with it by myself. I wanna know if it's also working with the idproc element or if there is a fast command to build a transfer function with it.

Thanks in Advance!

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Paul 2021-9-16

edit: it works perfectly fine when there is no other figure open

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Answer 1

Khaled Aljanaideh 2021-9-17

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1454409-nyquist-plot-of-idproc-model#answer_789974

Hi Paul,

You can convert an idproc model to a transfer function model simply using the command tf(PT2_Td), where PT2_Td is the idproc model. I tried my self to create a Nyquist plot using the command nyquist(PT2_Td) and I did not see any problems.