Output of Transfer Function in Sys ID App not the same as workspace

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rtn
rtn 2022-6-23
回答： Rajiv Singh 2022-8-9
The output of a model is different in the App than in the command line:
From the app
y_sim2 = sim( tf4 , merged(:,[],:));
y2 = y_sim2.OutputData;
realy = merged.OutputData;
%%
figure()
plot(y2{2}, 'Color', 'c')
hold on
plot(realy{2}, 'Color', 'k')
I am wondering why this occurs with the same transfer function and the same input!

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回答（1 个）

Rajiv Singh
Rajiv Singh 2022-8-9
In addition to the input, you need to ensure that you are using the same initial conditions. See:
Estimate Initial Conditions for Simulating Identified Models - MATLAB & Simulink (mathworks.com)

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