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System Identification of MIMO

Asked by Leonardo Araujo on 2 Jan 2014
Latest activity Edited by Sebastian Castro on 1 May 2019
Hi guys I'm working on a project of quadrotor control.
I've done the first principles modelling using SimMechanics, and now I would like to compare the plant model with a model derived from input/output data from the real life.
My question is about how to use System identification when you have more than one input and output, does I need to input random values at all inputs at the same time? Ore try to create models for each output?
Thanks in advance!

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1 Answer

Answer by Sebastian Castro on 28 May 2014
Edited by Sebastian Castro on 1 May 2019

You can perform System Identification on a MIMO system, as shown in this example.
If you already have a model in SimMechanics, however, and you just want to match parameters in that model to your data, I'd recommend using the parameter estimation capabilities in Simulink Design Optimization (if this product is available to you). Here is an example of parameter estimation for an inverted pendulum model in SimMechanics .

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