close loop PID autotuner

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Dhaval Kapupara
Dhaval Kapupara on 24 Apr 2020
Edited: Dhaval Kapupara on 26 Apr 2020
Hi there,
I am using "https://www.mathworks.com/help/mcb/gs/tune-pi-controllers-using-foc-autotuner.html" example for PMSM autotuning simulation. but i want to modify it as per my requirement, for that i remove autotuner for speed loop and include "closed loop PID autotuner" but it shows following error.
so, what is possible solution for the same?
i tried to edit block(closed loop PID autotuner), but unable to do so.

Accepted Answer

Zhao Wang
Zhao Wang on 24 Apr 2020
Based on the information you provided, replacing the 'FOC Autotuner' block with a 'Closed-Loop PID Autotuner' block is feasible. The error message you posted indicates possible sample-time mismatch associated with the inserted 'Closed-Loop PID Autotuner' block. To view sample times used in the model, please refer to the following link: https://www.mathworks.com/help/simulink/ug/how-to-view-sample-time-information.html
To resolve the issue, you will need to use 'Rate Transition' blocks to interface blocks with different sample times.Please also note that the 'Current Control' subsystem is a triggered subsystem, which is different from a block with fixed sample time. This triggering settings are because of its synchronization with ADC interrupt (explained in https://www.mathworks.com/help/mcb/ug/prepare-task-scheduling.html). Sample time settings also need to be adjusted accordingly.
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Dhaval Kapupara
Dhaval Kapupara on 25 Apr 2020
Edited: Dhaval Kapupara on 26 Apr 2020
Zhao Wang, Thank you!
It worked.

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