whether matlab function block and trigger block can be linearized?
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Li Yang
il 16 Feb 2016
Commentato: Connor Landrum
il 23 Apr 2019
Hi, I am modeling a motor control system. In my controller, I am using (1) matlab function block to do some calculations; and (2) triggered blocks to simulate the different updating speed of my outer and inner PI control loop. Now I want to use the PID tuner to find pi gains for my outer loop(has 1 PID controller) and the inner loop(has 2 PID controllers), but the PID tuner just can't launch. So I am wondering if a simulink model like mine can actually been linearized?
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Anish Mitra
il 23 Feb 2016
Is there a specific error message?
When I add switches in a model (in R2015b) and then try opening the PID Tuner - it does open and then show a message stating that the plant cannot be linearized. Do you see something similar?
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Arkadiy Turevskiy
il 24 Feb 2016
Hi, Triggered subsystems are discontinuous and would typically not linearize.For cases when exact linearization does not work, the best approach is to compute linear model approximation using simulation data.
Hope this helps.
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Connor Landrum
il 23 Apr 2019
Hi Arkadiy,
You mention triggered subsystems, does that only include triggered blocks, or are matlab function blocks also triggered subsystems, and if so would similar methods work to compute a linear model approximation?
Thanks
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