derivation block changes time step - Simulink

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Darius 2023-9-8

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https://ww2.mathworks.cn/matlabcentral/answers/2018446-derivation-block-changes-time-step-simulink

编辑： Guillaume 2023-9-14

i am trying to derivate a speed profile with a fixed step size of 0.005 sec, but after the derivation the time step size increases to 1 second. I have set, in the Model settings, the timestep size to be 0.05 but without any success. does anybody know how to fix this?

the result I'm expecting is a discrete signal with the same step size as the original signal

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Guillaume 2023-9-14

编辑：Guillaume 2023-9-14

Hello,

Sorry I did not see the full screenshot at the first time. Depending on your model you can also sample time issue (atomic subsystem configured with a different sample time or many other specific cases).

But it can also be the 'Decimation' parameter of your Scope ?

Sam Chak 2023-9-14

Hi @Darius,

I believe you want to compute the discrete-time derivative of the speed profile. However, I cannot verify the alleged 1-second time step from your image. Could you clarify that?