Question
Hello everybody! Do you know if it's possible to change one of the matrices componing a genss (not only the tunable parameter) ? For example the following system: a = realp('a', 10); % The tunable parameter A = [ 0 1; 1 a]; B1 = [1; 0]; B2 = [1 2; 0 1]; C = [1 1]; D = 0; G = ss(A, B1, C, D); Now I want to change the B matrix (to cope with more inputs for example) but I don't want to create a new genss (maybe I can't access A, C and D matrices, which could be much more complicated). My question is: is it possible to change the B1 matrix by the B2 matrix in G ? It's seems it's not even possible to access the A, B, C and D matrices of G except for the current value (but A won't be a genmat). Does anybody have any idea ?
Expert Answer
Kshitij Singh
PhD Expert
Answered Aug 20, 2026
I don't know if you can change the size, but I think you could create some more tunable parameters to fill B, but make sure they are not free:
b = realp('b',[1; 0]);
b.Free = [0;0];
B1 = b;
That way you could change the value of b by hand, and it wouldn't be tuned by whatever you are using the system for.
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