I have a simple Simulink model, looking like the following:
I want the sum (at the right) to be equal to zero, so I have the following equation:
Input*ss1 + Input*K*ss2 = 0
Input * (ss1 + K*ss2) = 0
ss1 + K*ss2 = 0
K = -inv(ss2)*ss1
Both ss1 and ss2 are linear state space with one input, and one input. However, when calculating K, I get a descriptor state space (a,b,c,d AND e), which I cannot (or do not know how to) enter in Simulink. When running the simulink model without the 'K.e', it does not add up to zero.
Can someone tell me how to calculate K, so I don't get the descriptor SS? Or how to use the descriptor SS in Simulink?