Incorrect Integrator Behaviour Simulink

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Muhammad Abdur Rahman
Muhammad Abdur Rahman 2022년 5월 28일
댓글: Muhammad Abdur Rahman 2022년 5월 28일
Consider the following simple block diagram:
I get the following output on the scope:
What is going on here? If the integrated function was shifted by some constant of integration C, that would be understandable. But why the change in amplitude?

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Paul
Paul 2022년 5월 28일
It looks like the input sine wave is
sin(2*pi/2*t) = sin(pi*t)
The output of the integrator should be
-1/pi*cos(pi*t) + C
Because the IC on the integrator is zero, C is then
-1/pi + C = 0 -> C = 1/pi.
So the integrator output should be
-1/pi*cos(pi*t) + 1/pi
which looks like result in the scope.
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Muhammad Abdur Rahman
Muhammad Abdur Rahman 2022년 5월 28일
Oh no! I made a mathematical oopsie. 😳

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