Why am I getting an error when using the RLOCUS function to find the root locus of my system when using the Control System Toolbox 5.1 (R12.1)?
35 views (last 30 days)
Show older comments
Why am I getting an error when using the RLOCUS function to find the root locus of my system when using the Control System Toolbox 5.1 (R12.1)?
Here is my system:
nume=[1 0 1];
dene=conv([1 0],[1 0 4]);
rlocus(nume,dene);
I get the following error upon running the above code
??? Error using ==> eig
NaN or Inf prevents convergence.
RLOCUS works fine with other systems.
Accepted Answer
MathWorks Support Team
on 27 Jun 2009
This is a bug in RLOCUS in the Control System Toolbox 5.1 (R12.1) that has been fixed in the Control System Toolbox 5.2 (R13).
As a workaround for R12.1, please explicitly specify the Gain value in the RLOCUS command.
nume=[1 0 1];
dene=conv([1 0],[1 0 4]);
sys = tf(nume,dene);
GainK=0;
rlocus(sys,GainK);
0 Comments
More Answers (0)
See Also
Categories
Find more on Classical Control Design 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!