Simulink scope giving out "noisy" output
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So I have a simulink model that gives output of error signal fed back to a PID controller. The problem is that its very "noisy" (as can be seen below); whereas it is supposed to be flat (as shown in the 2nd picture). I can see that the shape of the noisy response is overall similar to the correct one; its just the noisy oscillations that make them different. Does anyone know why? I have chosen a stiff ode solver but this problem keeps persisting.![aekx5ucub0131.png](https://www.mathworks.com/matlabcentral/answers/uploaded_files/221611/aekx5ucub0131.png)
![aekx5ucub0131.png](https://www.mathworks.com/matlabcentral/answers/uploaded_files/221611/aekx5ucub0131.png)
2 commentaires
Arvind Sathyanarayanan
le 31 Mai 2019
Ariel, attaching the model will help us answer the question better.
Are your reference and feedback signals noise free? Have you tried playing with your PID gains?
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