zero phase filter in simulink
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I am trying to run a zero phase low pass filter in Simulink in MATLAB however I can't find a zero phase filter block. The function filtfilt() works however when i use a self defined function block in Simulink with the same code that works in MATLAB it doesn't seem to work in Simulink. I have attached an image of the Simulink model and the code itself.
function y = test_lp(u)
Wn = 0.01*5;
[b,a] = butter( 3, Wn, 'low');
data=u(:,2);
y= filtfilt(b,a,u(:,2));
%y=filtfilt(b,a,u);
end
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回答(2 个)
Sameer Gadekar
2019-4-11
Any filter will introduce and has to introduce delay in the output else filter will become instable it wll become non causal.
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