How can I use two PID controllers in Simulink?

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Luca Repetto 2021-4-26

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编辑： Luca Repetto 2021-4-27

I have designed a PID controller to track the first state plus some random noise, but I have also to design the same system with two PIDs, with the second state to be tracked. Here is a picture showing what I have done. Can you help me? Thank you in advance.

This is how I've done it with one PID.

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Answer 1

Fangjun Jiang 2021-4-26

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Your output y seems to be 2x1, but if your current model runs, then your control variable u is 1x1. You can't have two PID controllers if you have only one contro variable.

If your control variable is indeed 2x1, then have another desired output, another negative feedback, another PID controller, and then Mux the ouputs of the two PID controller and feed to the State Space block.