How to use arxstruc with multiple input multiple output ( MIMO ) systems?

Question

Marco Guzzon 2022-8-9

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https://ww2.mathworks.cn/matlabcentral/answers/1776585-how-to-use-arxstruc-with-multiple-input-multiple-output-mimo-systems

评论： pia sarkar 2023-1-13

I'm trying to use the command arxstruc to estimate the input delay of a Multiple Input, Multiple Output system (two inputs and two outputs).

I have written the system in state space form and i'm aware that arxstruc only work with single-output system, my idea is to go from one output to the next using a for cycle, thus reducing my problem to a succession of input delay estimations on MISO systems.

I don't know how to use arxstruc with a MISO system.

I'm also aware that in an ARX model the [na nb nk] coefficients depend on the number of inputs (the number of outputs must be one to use arxstruc), specifically I don't know how to pass the correct [na nb nk] to arxstruc while still being able to examine different combinations of na, nb, nc.

I need help on how to correctly write the third input argument for arxstruc in order to use my two inputs at the same time.