Behavioural constraints in gamultiobj

Hi,

I am using gamultiobj to run a structural optimization routine.

I am trying to input some constraints that are relative to the objective function instead of the variables.

With this I mean that I want to rule out some of the solutions based on the value that corresponds to it by one of the objective functions. If it is above a defined threshold, that solution is not admissible.

But I don't know how to input a constraints of this kind in Matlab.

Any insights on this?

Thanks so much.

Ricardo

Answer 1

[Alan Weiss]

Unfortunately, gamultiobj does not accept nonlinear constraints. Any work-around would require some programming.

Perhaps for this case you could change the definition of the objective function in question so that when it is above your threshold, it returns a much larger value than the truth, so that it will not be included in any Pareto optimum.

Alan Weiss

MATLAB mathematical toolbox documentation

[Ricardo]

I have thought about that and have tried it. It does not work. In the end it generates a non dominated solution with that value, so no good.

Thanks anyway. I guess I will have to do it myself.

This is a clear chance for the multiobjective ga of matlab to be improved.