Running two control systems with different rates

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patr chri 2020-6-4

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https://ww2.mathworks.cn/matlabcentral/answers/541979-running-two-control-systems-with-different-rates

评论： patr chri 2020-6-5

Hello,

I have a relatively general question. I have two control systems that communicate with each other (one feedforward controller and one MPC) and I am trying to make one of these systems faster than the other one in terms of sampling rates. For example, I want the feedforward controller to be slower than the MPC.

Is there a Simulink block that can help me implement this?

Thank you

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Paresh yeole 2020-6-4

For the first question, Yes.

For the second question, you are correct if you have selected as -1 for sampletime option for the PID block. You can have a user-defined value for the PID block as well.

patr chri 2020-6-5

My issue is that when I am trying to change the MPC sampling rate to make it faster (ie smaller sampling rate) it doesn't allow me because it is not dependent (integer product) of the Simulink settings fixed solver sampling time.

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