I have a question about the input argument to the method tf2sos.
The documentation says it takes the coefficients as vectors of the transfer function
.
I suspect that what is actually meant is that it takes as vectors of the transfer function
.
I have tried the following code, but I can not make sense of it.
clear all;
close all;
ts = 1/10000;
z = tf(‘z’, ts);
b0 = 1;
b1 = 2;
b2 = 3;
a0 = 1;
a1 = -2;
a2 = 5;
H = tf([b2, b1, b0], [a2, a1, a0], ts);
Hi = (b0 + b1*z^-1 + b2*z^-2)/(a0 + a1*z^-1 + a2*z^-2);
[sos_H,g_H] = tf2sos(H.Numerator{1}, H.Denominator{1});
[sos_Hi,g_Hi] = tf2sos(Hi.Numerator{1}, Hi.Denominator{1});
K_H = g_H*(sos_H(1,1) + sos_H(1,2)*z^-1 + sos_H(1,3)*z^-2)/(sos_H(1,4) + sos_H(1,5)*z^-1 + sos_H(1,6)*z^-2);
K_Hi = g_Hi*(sos_Hi(1,1) + sos_Hi(1,2)*z^-1 + sos_Hi(1,3)*z^-2)/(sos_Hi(1,4) + sos_Hi(1,5)*z^-1 + sos_Hi(1,6)*z^-2);
figure()
hold on
step(H);
step(K_H, ‘–‘);
legend();
grid();
figure()
hold on;
step(Hi);
step(K_Hi, ‘–‘);
legend();
grid();
What am I doing wrong?I have a question about the input argument to the method tf2sos.
The documentation says it takes the coefficients as vectors of the transfer function
.
I suspect that what is actually meant is that it takes as vectors of the transfer function
.
I have tried the following code, but I can not make sense of it.
clear all;
close all;
ts = 1/10000;
z = tf(‘z’, ts);
b0 = 1;
b1 = 2;
b2 = 3;
a0 = 1;
a1 = -2;
a2 = 5;
H = tf([b2, b1, b0], [a2, a1, a0], ts);
Hi = (b0 + b1*z^-1 + b2*z^-2)/(a0 + a1*z^-1 + a2*z^-2);
[sos_H,g_H] = tf2sos(H.Numerator{1}, H.Denominator{1});
[sos_Hi,g_Hi] = tf2sos(Hi.Numerator{1}, Hi.Denominator{1});
K_H = g_H*(sos_H(1,1) + sos_H(1,2)*z^-1 + sos_H(1,3)*z^-2)/(sos_H(1,4) + sos_H(1,5)*z^-1 + sos_H(1,6)*z^-2);
K_Hi = g_Hi*(sos_Hi(1,1) + sos_Hi(1,2)*z^-1 + sos_Hi(1,3)*z^-2)/(sos_Hi(1,4) + sos_Hi(1,5)*z^-1 + sos_Hi(1,6)*z^-2);
figure()
hold on
step(H);
step(K_H, ‘–‘);
legend();
grid();
figure()
hold on;
step(Hi);
step(K_Hi, ‘–‘);
legend();
grid();
What am I doing wrong? I have a question about the input argument to the method tf2sos.
The documentation says it takes the coefficients as vectors of the transfer function
.
I suspect that what is actually meant is that it takes as vectors of the transfer function
.
I have tried the following code, but I can not make sense of it.
clear all;
close all;
ts = 1/10000;
z = tf(‘z’, ts);
b0 = 1;
b1 = 2;
b2 = 3;
a0 = 1;
a1 = -2;
a2 = 5;
H = tf([b2, b1, b0], [a2, a1, a0], ts);
Hi = (b0 + b1*z^-1 + b2*z^-2)/(a0 + a1*z^-1 + a2*z^-2);
[sos_H,g_H] = tf2sos(H.Numerator{1}, H.Denominator{1});
[sos_Hi,g_Hi] = tf2sos(Hi.Numerator{1}, Hi.Denominator{1});
K_H = g_H*(sos_H(1,1) + sos_H(1,2)*z^-1 + sos_H(1,3)*z^-2)/(sos_H(1,4) + sos_H(1,5)*z^-1 + sos_H(1,6)*z^-2);
K_Hi = g_Hi*(sos_Hi(1,1) + sos_Hi(1,2)*z^-1 + sos_Hi(1,3)*z^-2)/(sos_Hi(1,4) + sos_Hi(1,5)*z^-1 + sos_Hi(1,6)*z^-2);
figure()
hold on
step(H);
step(K_H, ‘–‘);
legend();
grid();
figure()
hold on;
step(Hi);
step(K_Hi, ‘–‘);
legend();
grid();
What am I doing wrong? tf2sos, tf, second order sections MATLAB Answers — New Questions

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