Creating transfer function with a variable gain "k"
89 views (last 30 days)
Show older comments
Let's say we have a variable gain "k" in series with H(s)=(s*0.5-1)/(s*(s+1)^2), how may I get the complete transfer function with the variable K in matlab out of this? I don't want to use simulink.
0 Comments
Answers (4)
Robert
on 1 Oct 2016
This problem was never really solved and now i have the same one. How do you handle this? You create a transfer function with tf function but it does not allow for adding gain?
Makes no sense to me
0 Comments
Yamac Tan
on 16 Apr 2020
Edited: Yamac Tan
on 16 Apr 2020
I have the same problem right now but I cannot find an exact solution. I have a closed loop negative feedback model with the static gain as "K" on the upper branch. I need to show "Input/Output = Transfer Function" with the variable "K". Still makes no sense.
2 Comments
Paul Kroemer
on 29 Oct 2020
I have the same Problem right now, so i wanted to ask if you found a solution for it? Thanks for your help.
Paulo Silva
on 30 May 2011
K=1:10
sys=K*H(s) %replace H(s) with your transfer function
sys(1) is your system with gain K=1 and so on until sys(10) -> K=10
you can also use functions like the step
step(sys) %this will plot your system response to a step for each gain K
5 Comments
Paulo Silva
on 30 May 2011
If you have the symbolic toolbox take a look at this
http://www.mathworks.com/matlabcentral/answers/6355-how-do-i-get-the-coefficients-of-this-symbolic-expression
Prajith S A
on 22 Aug 2022
s = tf('s'); % Assign variable s, as variable of the transfer function
sys = (s+1)/(sˆ2+2*s+1)
s = zpk('s');
sys = (s+1)/(sˆ2+2*s+1) % Returns transfer function in factored form
0 Comments
See Also
Categories
Find more on Stability Analysis in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!