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Responce From Estimated SysID Modell in Simulink isn't the same as shown in matlab compare() function

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Iaroslav Gryshchuk
Iaroslav Gryshchuk 2023-3-23
编辑： Iaroslav Gryshchuk 2023-3-31
I have recorded requested motor torque data and current position data.
Split them. From the first half of the data created iddata object EstimationData. From the second half ValidationData. Then run:
processModel=procest(EstimationData,'P3DZU');
then run:
compare(ValidationData,processModel);
shows following response with very good fit of 99,54 %.
Then following Sinulink structure is build:
Scope shows following picture:
So my question is, why doesn't the signals match ob Scope how they match in the figure after calling compare function()?

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回答（1 个）

Nikhilesh
Nikhilesh 2023-3-31
Hi Iaroslav,
The possible reason might be the simulation parameters, also try adjusting initial conditions of simulink model to match that of validation data.
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Iaroslav Gryshchuk
Iaroslav Gryshchuk 2023-3-31
编辑：Iaroslav Gryshchuk 2023-3-31
Hi, how do I adjust intitial conditions of simulink model to match that of validation data?
This is my validation data:
Which simulation parameter can help me? Here is th same scope output with simulation stopped at 50 seconds:
Here are my Configuration Parameters:

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