Simulink MPC Designer ZOH FOH Error

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Henry Provan
Henry Provan 2016-3-5
回答： dekun wang 2021-5-18
I am trying to design an MPC controller using the simulink controller toolbox. Whenever I try to make the MPC sample time less that 1, I get the following error: "The "zoh" and "foh" methods cannot be used for discrete models with poles near z=0" Could someone please explain what the error means and how I fit my controller? Thanks
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Jordan Olson
Jordan Olson 2020-7-1
I'm also having this issue, but changing the sample time in the MPC doesn't fix it.

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dekun wang
dekun wang 2021-5-18
poles in discrete domain near z=0 means poles in continuous domain tending to -infinite which means your system's natural frequency is infinitely large. It cannot be true for any systems. So my suggestion would be to double check your plant model.

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