How to use a model generated from System Identification Toolbox in my work space?

Asked by Arseniy Sleptsov on 2 Sep 2019

Latest activity Answered by Rajiv Singh on 3 Sep 2019

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Hello,

I generated transfer functions for 2 inputs and 1 output using System Identification Toolbox. Then I converted to my workspace: now I have 1x2 idtf file in my workspace. How can I use next this? Basically I want to handle to my model new inputs to generate outputs.

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Products

System Identification Toolbox

Release

R2014a

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Answer by Rajiv Singh on 3 Sep 2019

Accepted Answer

The result of estimation is an object of IDTF class. It has properties containing numerical values of numerator and denominator. It has methods for performing simulation (sim, lsim) and analysis (step, bode, pzmap etc)

Extract out numerical values of numerator and denominator polynomials using the "Numerator" and "Denominator" properties, as in B = obj.Numerator;
Use LSIM method for time domain simulation as in

[y,t] =lsim(obj, input, time)

See idtf documentation reference page for information on supported properties and methods of idtf object.

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Arseniy Sleptsov (view profile)