Dear Sikander Hans,

I suggest you to see links and attached files on topic.

https://www.sciencedirect.com/book/9780128148686/non-monotonic-approach-to-robust-h-infinity-control-of-multi-model-systems

Article New approaches to H INFINITY controller designs based on fuz...

Best regards

Most LMIs and H-infinity controllers require an iterative search to solve the controller problem. I am guessing that you would like to solve the problem within a hard deadline for some real-time application? If so you can use the normalized coprime factorization H-infinity approach of Glover and Macfarlane. The MATLAB solution does use iteration, but there is a non-iterative solution (suggested I think by Safanov). I have used it for a similar reason. If this is what you are looking for, let me know & I will post the references.

Dear Sikander Hans,

Have a good day.

I suggest you to see the following article.

Conference Paper Real-time neural backstepping control for a helicopter prototype

If you have any questions please let me know.

Best regards from Mexico.

Dr. Oscar J. Suarez

thank u so much James Whidborne sir

thank u so much Mohamed-Mourad Lafifi sir

thank u so much Oscar J. Suarez sir

I think that system identification by step change, then MATLAB simulation before implementation greatly reduced the mathematical difficulties in any control strategy

thank u so much Khalid M. Mousa sir