Control systems using MATLAB/SIMULINK

Actually, I designed my mathematical model using MATLAB/SIMULINK it is for some control purpose in my project. During feedback when using two "INTEGRATOR BLOCK" in my model i've error "at some time integrator output become infinity or NAN"

I tried by applying limits it causes the constant outputs (i.e., lower limit output from one integrator and upper limit output from another integrator)from integrator. Because of this i get constant error outputs form two integrator.

please help me to solve this problem.

Answer 1

[Arnaud Miege]

It sounds like your integrators are saturating. You need to figure out what's causing them to saturate and fix the root cause. Using Embedded MATLAB block is not going to help. Use scopes to look at the various signals around your feedback to try and figure out where the error is. Without looking at the model, it's impossible be more specific. Can you upload the model to a filesharing site?