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
回答（2 个）
Sameer Gadekar
2019-4-11
0 个投票
Any filter will introduce and has to introduce delay in the output else filter will become instable it wll become non causal.
Rafael Cordero
2020-6-17
0 个投票
Im having the same problem. Did you ever figure out how to fix this?
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2019-1-24
2020-6-17
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