Hi everyone,
I am using fminsearch on simulink real-time system. It's called once in a while not peridoically but can say roughly every 1 s.
My real time sampling period is 1 ms. However, fminsearch takes about 2.5-3.5 ms causing system overload. That's not a problem for me because I don't need the optimizer result in the next 10 mseconds.
My problem is that there are some tasks that has to be executed every 1 ms. When overload occurs, this cannot be fulfilled for the next 3 iterations.
As a resolution, I was think of limiting the max number of function evaluations and max number of iterations to a value satisfying 1 ms execution period. Then, starting fminsearch from where it's left at the previous step. Currently, an optimization is completed in nearly 150 function evaluations.
However, I can't manage to change MaxFunEvals and MaxIter. By default, they are both set as '200*numberofvariables'. Matlab doesn't allow me to change MaxFunEvals or MaxIter to 50 (for example), It gives an error. So I tried '50*numberofvariables' but that doesn't limit the number of function evaluations to 50. What's the proper way of doing this?
