PID tuner not working for Simulink BLDC Motor Controller

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CB
CB on 17 May 2018
Commented: Mudit Verma on 14 Sep 2020
Hi,
I am using discrete PI controller for simulink BLDC Motor(Simpower systems) and controller, I have speed feedback from motor in rpm and trying to get PI block's output for duty cycle input of PWM generator. Whenever I press Tune button its says failed to linearized the model and sometimes it does not get launched. If I manually put the PI parameters my motor and controller is working fine.

Answers (1)

Arkadiy Turevskiy
Arkadiy Turevskiy on 15 Aug 2018
Edited: Arkadiy Turevskiy on 29 Oct 2018
Hi,
When you press "tune" button, PID Tuner tries to linearize the model and comes up with zero due to discontinuities introduced by PWM.
To tune PID Controller in this case use new PID Tuning capabilities introduced in recent releases. See here and watch this video which shows exactly what you are trying to do.
Hope this helps.
Arkadiy Turevskiy
MathWorks
P.S. There is now a shipping example in R2018b showing how to do this, please see here .
  3 Comments
Mudit Verma
Mudit Verma on 14 Sep 2020
I am using online PID tuner or Autotuner block to tune the PI controller for simulink BLDC Motor example(Simpower systems). The MATLAB version I am using is 2018b. Although I have connected the block properly and the moment I push the start and stop button of the Online tuner it does compute the P and I gains, It shows zero values. I have attach my model files plzz check it

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