Simulation of PID without simulink

Question

Maksym Zawrotny 2019-4-9

1
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/455247-simulation-of-pid-without-simulink

评论： Ful0 2021-4-26

采纳的回答： David Wilson

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Hello!

I am trying to simulate a plant and I cannot simulate output of PID controller. I got PID object by

pidtude(sys, type)

Method returned me a discrete time PID controller just as I wanted, but the problem is that

y = lsim(sys, u)

function cannot be used to simulate response of improper transfer function systems. Is there any other method which can I use to simulate response of pid object knowing input vector? I prefer not using simulink.

Thank you,

Maksym Zawrotny

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Answer 1

David Wilson 2019-4-9

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https://ww2.mathworks.cn/matlabcentral/answers/455247-simulation-of-pid-without-simulink#answer_369767

It's unusual to just simulate a PID controller, and yes the D-part typically makes it non-proper. Without adding a fast denominator term or two, this is an ill-advised thing to do.

You can of course simulate the PID & plant, say either with Gc*Gp or using series.