PID Tune: Plant cannot be linearized. Why?
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Hello everyone,
I'm using simulink for simulating a cooling system. When I try to use the tune button on the PID it opens the tuning window and say:
Plant cannot be linearized.
Why is this happening?
The PID is doing is job. I've attached files.
Thank you very much for the help,
Norman
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Accepted Answer
Arkadiy Turevskiy
on 18 Jun 2014
The plant is linearized, but the linearization at t=0 is a gain of zero. Most likely this happens due to initial conditions in the model. You can ask the PID Tuner to linearize the model at a simulation snapshot of say t/2, when everything comes to steady state.
When you do that, the PID Tuner successfully linearizes the model and designs a PID controller.
Here are the snapshots of the steps using R2014a.
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More Answers (1)
Norman
on 19 Jun 2014
7 Comments
Sharjeel Khan
on 25 Dec 2020
@Ayesha Sandamali i'm also simulating and grid connected PV system. I'm also facing the same problem can you help me with that please??
Yashas S V
on 21 Jun 2021
Did you guys find anything? Please let me know if you find anything. Thanks in advance. (mail ID: ee18b040@iittp.ac.in)
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