Self tuning controller can be used...

Dear Dohare

You said correctly, I can be used self tuning I think it's a part of adaptive methodology. these methods have some advantages and disadvantages. I also have many papers related to design self tuning controllers, You also can follow my papers.

There is not a better control. However, passive schemes avoid leakage of energy. Also, if you need robustness to disturbance effects sliding mode techniques could work, by example integral sliding modes schemes. There exist miscellaneous approaches that combine these two concepts. 

Dear Vazquez

Thank's for your answer. You said SMC can help me to have a robust controller but it has some challenges such as chattering or equivalent problem. Do you have a better choice?

I have more than 70 papers related to SMC methodology, you can follow my papers.

Dear Vazquez

You said correctly, SMC is a good choice to control, I'd like to know that is it the best one?????

If we select this one, I must to think, how we can modify this controller?

So if you said SMC is better Than CTC , Backstepping or the other type of controller you must to explain it.

Regards

There is no a best one, it depends of many parameters. Consider energy, signal control amplitude, actuators speed, admissible sampling rate, etc, etc, etc. You need to do many simulations and mathematical analysis. That works ;)

Flatness-based control (and its advance version : Exactfeedforward linearization). Definitively.

- V Hagenmeyer, E Delaleau (2010) Robustness Analysis with Respect to Exogenous Perturbations for Flatness-Based Exact Feedforward Linearization IEEE Trans. Automat. Control., vol. 55, pp. 727-731

- V Hagenmeyer, E Delaleau (2003) Robustness Analysis of Exact Feedforward Linearization based on differential flatness Automatice, vol. 39, pp. 1941-1946.

- V Hagenmeyer, E Delaleau (2003) Exact feedforward linearization based on differential flatness, International Journal of Control, vol. 76, pp. 537-556.

Article Robustness Analysis With Respect to Exogenous Perturbations ...

Thanks for references..

Best wishes

Sundar

Dear Prof 

Thanks for your idea and reference.

Regards

Farzin

I don't know the detail of your model. But so far as my knowledge is concerned, robust controller based on signal compensation is the most practical way to control an unknown plant. The idea of implementation is rather simple by regarding all model uncertainty and external disturbances as an overall signal, and  suppressing it by output error feedback. See publications by Prof. Zhong, Y.-S. from Google Scholar.   

Maybe you can have a look and even try Simple Adaptive Control (SAC) in my papers and their references, with specific applications to robots. Classical Control  designers have observed that adding simple adaptive algorithms add performance and robustness with uncertainty.