How to simplify transfer function?
373 views (last 30 days)
Show older comments
Hi guys
I have used the function s=tf('s') to ceate a transfer function, but I find that Matlab do not simplify the tf at all.
for example.
s=tf('s');
A=1/(1+s);B=A/(1+A);
the result is 1+s/(s^2+3*s+2)
What I want is 1/(2+s)
Anyone know that how to simplify the tf in Matlab?
Thank you!
0 Comments
Accepted Answer
Thomas
on 25 Apr 2012
Try
s=tf('s');
A=1/(1+s);B=A/(1+A);
minreal(B)
2 Comments
Tim
on 5 Feb 2015
Looks like a solution to my problem, however I need to find variables from a rewritten tf.
I have a tf G like below
lsys = ss(A B C D); % were all matrices are 3x3
G = tf(lsys);
from which I am intersted in rewriting G(2,2)
G(2,2)=
1.422e-05 s + 4.696e-06
-----------------------
s^2 + 21.76 s + 1.216
into
a * (b*s + 1)
-----------------
(c*s +1)*(d*s+1)
to yield constants a b c d
MatLab does not accept
minreal(G(2,2));
any suggestions?
More Answers (1)
See Also
Categories
Find more on Startup and Shutdown in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!