system identification toolbox
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I need to find transfer function equation by using MATLAB System Identification Toolbox. But in this GUI, I only get polynomial equation.
My question is, how to convert this polynomial equation to transfer function equation?
hope you can help me.. Thanks...
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Rajiv Singh
2012-5-9
0 个投票
- If you use Output-Error (OE) model structure, then the ratio of the polynomials B and F is your transfer function: TF := B(q)/F(q)
- You can export any identified model into MATLAB workspace and run TFDATA command on it to fetch numerator (Num) and denominator (Den) polynomials. Then the transfer function is Num/Den.
- In release R2012a, you can identify a transfer function model directly in the GUI. Use Estimate popup menu option "Transfer Function Models".
- You can convert an identified linear model into TF model of Control System Toolbox by using "TF" command, as in: sys = tf(sys, 'measured').
2 个评论
tiara
2012-5-10
Rajiv Singh
2012-5-14
From the GUI, you can drag the identified model and drop it on to the "To Workspace" icon. This drag-and-drop action will export the mode to workspace. Then you can run TFDATA command on it; the documentation explain the TFDATA command:
http://www.mathworks.com/help/toolbox/ident/ref/tfdata.html
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