@mehdi jafari Well to be more precisley, I'm trying to controll a multivariable system with 6 inputs, 6 outputs
therefor I'm introducing a decoupler, which I have to calculate
I'm using the method of Zalkind and Luyben, so a condition for my decoupler is that the decoupling matrix multiplied with my system must be a diagonal matrix.
to be able to solve this problem I have to do another assumption: that my decoupling matrix diagonal is 1, otherwise i'm under-determined
I did identify my system (it is in the attachment), so i was able to get my system of equations to calculate the parameters of my decoupling matrix (a[1,1].....a[6,6])
then I used the function solve but I'm not satisfied with the result.....
he is using s to the 70th order and the coefficient are about 10^100.
is there another function which is able to solve these equations??