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Statespaceidentification with PID toolbox

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Fabian
Fabian 2013-12-19
关闭： MATLAB Answer Bot 2021-8-20
Hi,
im trying to identify a complicated statespacemodel with system identification toolbox. I have a lot of physical insight, so im using structured parameterization to fix some values of statespacematrices.
For example for fixing C matrix to identity Im using
A = eye(5); B = eye(5); C = eye(5); D = zeros(5,5);
m = idss(A,B,C,D,'Ts',60); m.Structure.c.Free = false;
Similarly Im doing this for the other matrices. All this works nice so far.
Another fact im trying to incorporate is that my A matrix is symetric, but i dont know how i can accomplish that? Is there any method to do so?
Thanks for help!
Kind rgds Fabian!

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