Can any body helps me in sorting out my problem of writing the expression in LMI editor window of Robust Control tool box of Matlab?
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As per my requirement ,I have written following mat-lab expressions in LMI editor window of robust control tool box of mat-lab, so as to calculate the values of different matrices shown in these expressions according to the restriction imposed on them for optimizing my result. The expressions or different LMI's are as under:
R>0
S>0
Y1>0
Y1*Y4-Y2*Y3>0
Fy~=0
Zy~=0
Zy*Fy'==eye(2)-R*S&&Zy*Fy'~=0.
On running it through Mat-lab, the optimized value of Zy and Fy comes out to be equal to zero,even though I have specified in the expressions that Fy and Zy matrices should not be equal to zero , because in my problem I have to use the inversion form of the matrices Fy and Zy .Each of the above defined matrices in the expression are all symmetric matrices of structure [2 1]
I don't know where I am wrong? Kindly help me and direct my problem to the right person.
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