hi, I m trying to use NLOPT in a framework of aerodynamic shape optimization in which i have tested my gradient, In the problem i am trying to solve an optimized shape of a wing for minimum drag, i have 2 equality constraint lift and aspect ratio of wing, Well i have been using SLSQP solver with no success i add the lift coefficient to my main objective function and give a penalty, and then take this new formed objective function to use it in optimizer, then i create subroutines same as the tutorial problem to give functional value and its gradient. I also have a subroutine which calculates the value of aspect ratio and its gradient which i give a seperate constraint in the optimizer by nlopt_result nlopt_add_equality_constraint(nlopt_opt opt, nlopt_func h, void* h_data, double tol);
I have tested my gradient procedure very well n it matched with finite difference method. but still i am not able to get to optimized shape. Please help me i have been trying very very hard for it with no success. I am not using AUGLAG right now, but i would be glad if i get any help. Thank you. -- Milind Dhake Engineering Mechanics Unit Jawaharlal Nehru Centre for Advanced Scientific Research Bangalore
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