Transfer function State Optimisation

I have an input and an output file through experimental data. Input should go to a transfer function block and output graph should match with output of data from experiment. I have a rough transfer function, approximately matching with the output, but not precisely matching it. I am trying to use control and estimation under 'tools' but not getting the proper result. How exactly to go about configuring that tool? Akarsh

Answer 1

[Arkadiy Turevskiy]

Take a look at the function tfest in System Identification Toolbox. You can specify the number of poles and zeros for your transfer function and the tool will find the coefficients to ensure the best fit.

http://www.mathworks.com/help//ident/ref/tfest.html http://www.mathworks.com/products/demos/sysid/estimating-transfer-functions-and-process-models.html

HTH. Arkadiy

[yem]

hi arkadiy please i have a differentiel equation how can i use this toolbox ??

[Arkadiy Turevskiy]

You use case grey-box model estimation capabilities. See this example .